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CAS No. : | 27469-61-0 | MDL No. : | MFCD00191212 |
Formula : | C17H18Cl2N2 | Boiling Point : | - |
Linear Structure Formula : | - | InChI Key : | PTLFMGDNZYQISN-UHFFFAOYSA-N |
M.W : | 321.24 | Pubchem ID : | 285510 |
Synonyms : |
|
Signal Word: | Danger | Class: | 8 |
Precautionary Statements: | P260-P261-P264-P270-P271-P280-P301+P312-P301+P330+P331-P302+P352-P303+P361+P353-P304+P340-P305+P351+P338-P310-P312-P321-P322-P330-P363-P405-P501 | UN#: | 1759 |
Hazard Statements: | H302-H312-H314-H332 | Packing Group: | Ⅱ |
GHS Pictogram: |
* All experimental methods are cited from the reference, please refer to the original source for details. We do not guarantee the accuracy of the content in the reference.
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
74% | In acetonitrile at 90℃; for 16h; | |
68% | In acetonitrile Reflux; | 1-(bis(4-chlorophenyl)methyl)piperazine (9y) General procedure: 4,4'-(Chloromethylene)bis(chlorobenzene) (3.0 g, 11.05 mmol) was dissolved in acetonitrile (100 ml) at room temperature. Piperazine (8.6 g, 100 mmol) was added, and the mixture was refluxed overnight. Acetonitrile was evaporated. The mixture was dissolved in ethyl acetate and washed three times with water to remove the excess piperazine. The organic phase was dried over sodium sulfate, filtered, and concentrated. The crude mixture was purified on silica gelusing a gradient of (7N NH3 in methanol) in dichloromethane to afford 2.4 g of 9 as an off-white solid (7.51 mmol, 68%). |
60% | In acetonitrile for 2h; Heating; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With triethylamine; toluene |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
91% | In tetrahydrofuran for 5.75h; Heating; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Yield given. Multistep reaction; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With potassium carbonate; potassium iodide In butan-1-ol for 8h; Heating; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
33% | In water for 12h; Heating; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
23% | With potassium carbonate In tetrahydrofuran for 18h; Heating; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
72% | With sodium carbonate In toluene for 1.5h; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
96% | With sodium hydroxide In methanol for 72h; Heating; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With sodium hydrogencarbonate In ethanol for 18h; Ambient temperature; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
In ethanol for 2h; Heating; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
In ethanol for 3h; Heating; Yield given; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
46% | With sodium hydrogencarbonate In N,N-dimethyl-formamide at 140℃; Heating; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
4.4'-Dichlor-benzhydrylchlorid, Piperazin; | ||
entspr. Chlorid, Piperazin; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 2 steps 1: ethanol / 2 h / Heating 2: BH3-SMe2 / tetrahydrofuran / 2 h / Heating |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 3 steps 1: ethanol / 2 h / Heating 2: BH3-SMe2 / tetrahydrofuran / 2 h / Heating 3: sodium cyanoborohydride / methanol; tetrahydrofuran / 5 h / 60 °C |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 3 steps 1: 98 percent / SOCl2 / cyclohexane / 24 h / Heating 2: 19 percent / K2CO3 / tetrahydrofuran / 14 h / Heating 3: 96 percent / 10percent aq. NaOH / methanol / 72 h / Heating | ||
Multi-step reaction with 2 steps 1: oxalyl dichloride; N,N-dimethyl-formamide / dichloromethane / 20 °C 2: acetonitrile / Reflux |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 2 steps 1: 19 percent / K2CO3 / tetrahydrofuran / 14 h / Heating 2: 96 percent / 10percent aq. NaOH / methanol / 72 h / Heating |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 4 steps 1: NaBH4 / methanol 2: 98 percent / SOCl2 / cyclohexane / 24 h / Heating 3: 19 percent / K2CO3 / tetrahydrofuran / 14 h / Heating 4: 96 percent / 10percent aq. NaOH / methanol / 72 h / Heating | ||
Multi-step reaction with 3 steps 1: sodium tetrahydroborate / tetrahydrofuran; methanol / 0.5 h / 0 °C 2: oxalyl dichloride; N,N-dimethyl-formamide / dichloromethane / 20 °C 3: acetonitrile / Reflux |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 2 steps 2: 1.) ethyl chlorocarbonate |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 2 steps 1: NaHCO3 / ethanol / 18 h / Ambient temperature 2: 22.3 percent / Et3N / dimethylformamide / 22 h / Ambient temperature |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 2 steps 1: 91 percent / anhydrous CuSO4 / tetrahydrofuran / 5.75 h / Heating 2: 84 percent / LiAlH4 / tetrahydrofuran / 7 h / Heating |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
1-(1-Chloro-2-hydroxy-3-propanyl)-4-[bis(4-chlorophenyl)methyl]piperazine 1-(1-Chloro-2-hydroxy-3-propanyl)-4-[bis(4-chlorophenyl)methyl]piperazine 4,4'-Dichlorobenzhydrylpiperazine (6.0 g, 18.7 mmol) was reacted as above with epichlorohydrin to give the title compound as an amber oil, 3.67 g (49.8%). 100 MHZ 1 H NMR (CDCl3) δ: 7.3 (s, 8H), 4.2 (s, 1H), 3.9 (m, 1H), 3.6 (d, 2H, J=10 Hz), 2.9 (m, 2H), 2.7-2.4 (m, 10H). | ||
1-(1-Chloro-2-hydroxy-3-propanyl)-4-[bis(4-chlorophenyl)methyl]piperazine 1-(1-Chloro-2-hydroxy-3-propanyl)-4-[bis(4-chlorophenyl)methyl]piperazine 4,4'-Dichlorobenzhydrylpiperazine ((6.0 g, 18.7 mmol) was reacted as above with epichlorohydrin to give the title compound as an amber oil, 3.67 g (49.8%). 100 MHz 1 H NMR (CDCl) δ: 7.3 (s, 8H), 4.2 (s, 1H), 3.9 (m, 1H), 3.6 (d, 2H, J=10 Hz), 2.9 (m, 2H), 2.7-2.4 (m, 10H). | ||
1-(1-Chloro-2-hydroxy-3-propanyl)-4-[bis(4-chlorophenyl)methyl]piperazine 1-(1-Chloro-2-hydroxy-3-propanyl)-4-[bis(4-chlorophenyl)methyl]piperazine 4,4'-Dichlorobenzhydrylpiperazine ((6.0 g, 18.7 mmol) was reacted as above with epichlorohydrin to give the title compound as an amber oil, 3.67 g (49.8%). 100 MHz 1 H NMR (CDCl3) δ: 7.3 (s, 8H), 4.2 (s, 1H), 3.9 (m, 1H), 3.6 (d, 2H, J=10 Hz), 2.9 (m, 2H), 2.7-2.4 (m, 10H). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With potassium iodide; potassium carbonate In water; N,N-dimethyl-formamide; toluene | 7 EXAMPLE 7 EXAMPLE 7 The mixture of 2.4 g of 4-(bis(4-chlorophenyl)methyl)piperazine, 2.0 g of 7-(4-chlorobutyryl)-2,3-dihydrothieno[3,2-f][1,4]thiazepin-5(4H)-one, 1.9 g of potassium carbonate and 1.2 g of potassium iodide in 15 ml of N,N-dimethylformamide and 15 ml of toluene was stirred at 60° C. for 5 hours. After the mixture was cooled in a water bath, water was added thereto. The precipitated crystals were filtered off and the filtrate was extracted with toluene. The organic layer was washed with saline solution, dried over magnesium sulfate and concentrated. The residue was purified by column chromatography on a silica gel and the resulting crystals were recrystallized from isopropyl alcohol-isopropyl ether to give 0.18 g of 7-(4-(4-(bis(4-chlorophenyl)methyl)piperazin-1-yl)butyryl)-2,3-dihydrothieno[3,2-f][1,4]thiazepin-5(4H)-one as white crystals, m.p. 185°-187° C. (decomposition). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
88.4% | In dichloromethane | 1-[Bis(4-chlorophenyl)methyl]piperazine 1-[Bis(4-chlorophenyl)methyl]piperazine To 4-chlorobenzhydrol (12.66 g, 50 mmol) in CH2 Cl2 (200 mL) under nitrogen, thionyl chloride (10 mL, 137 mmol) was added dropwise over 15 min. After 18 h and removal of the solvent in vacuo, the crude product was dissolved in CH2 Cl2 (100 mL) and washed with saturated NAHCO3 (3*), dried over Na2 SO4, and concentrated in vacuo to a thin, amber oil (12.53 g). Upon standing at room temperature for 1 h, crystallization occured to give pure product (12.5 g, 88.4%) as a white solid, mp 61°-64° C. DCI/MS (M+1) 235. 400 MHz 1 H NMR (CDCl3) δ: 7.35 (m, 8H), 6.05 (s, 1H). Anal. Calcd. for C13 H9 C13:C, 57.49; H, 3.34. Found: C, 57.69; H, 3.46. |
88.4% | In dichloromethane | 1-[Bis(4-chlorophenyl)methyl]piperazine 1-[Bis(4-chlorophenyl)methyl]piperazine To 4-chlorobenzhydrol (12.66 g, 50 mmol) in CH2 Cl2 (200 mL) under nitrogen, thionyl chloride (10 mL, 137 mmol) was added dropwise over 15 min. After 18 h and removal of the solvent in vacuo, the crude product was dissolved in CH2 Cl2 (100 mL) and washed with saturated NaHCO3 (3*), dried over Na2 SO4, and concentrated in vacuo to a thin, amber oil (12.53 g). Upon standing at room temperature for 1 h, crystallization occured to give pure product (12.5 g, 88.4%) as a white solid, mp 61°-64° C. DCI/MS (M+1) 235. 400 MHz 1 H NMR (CDCl3) δ: 7.35 (m, 8H), 6.05 (s, 1H). Anal. Calcd. for C13 H9 C13: C, 57.49; H, 3.34 Found: C, 57.69; H, 3.46. |
88.4% | In dichloromethane | 1-[Bis(4-chlorophenyl)methyl]piperazine 1-[Bis(4-chlorophenyl)methyl]piperazine To 4-chlorobenzhydrol (12.66 g, 50 mmol) in CH2 Cl2 (200 mL) under nitrogen, thionyl chloride (10 mL, 137 mmol) was added dropwise over 15 min. After 18 h and removal of the solvent in vacuo, the crude product was dissolved in CH2 Cl2 (100 mL) and washed with saturated NaHCO3 (3*), dried over Na, and concentrated in vacuo to a thin, amber oil (12.53 g). Upon standing at room temperature for 1 h, crystallization occured to give pure Product (12.5 g, 88.4%) as a white solid, mp 61°-64° C. DCI/MS (M+1) 235. 400 MHz 1 H NMR (CDCl3) δ: 7.35 (m, 8H), 6.05 (s, 1H). Anal. Calcd. for C13 H9 C13: C, 57.49; H, 3.34. Found: C, 57.69; H, 3.46. |
88.4% | In dichloromethane | 1-[Bis(4-chlorophenyl)methyl]piperazine 1-[Bis(4-chlorophenyl)methyl]piperazine To 4-chlorobenzhydrol (12.66 g, 50 mmol) in CH2 Cl2 (200 mL) under nitrogen, thionyl chloride (10 mL, 137 mmol) was added dropwise over 15 min. After 18 h and removal of the solvent in vacuo, the crude product was dissolved in CH2 Cl2 (100 mL) and washed with saturated NaHCO3 (3*), dried over Na2 SO4, and concentrated in vacuo to a thin, amber oil (12.53 g). Upon standing at room temperature for 1 h, crystallization occured to give pure product (12.5 g, 88.4%) as a white solid, mp 61°-64° C. DCI/MS (M+1) 235. 400 MHz 1 H NMR (CDCl3) δ: 7.35 (m, 8H), 6.05 (s, 1H). Anal. Calcd. for C13 H9 C13: C, 57.49; H, 3.34. Found: C, 57.69; H, 3.46. |
88.4% | In dichloromethane | 1-[Bis(4-chlorophenyl)methyl]piperazine 1-[Bis(4-chlorophenyl)methyl]piperazine To 4-chlorobenzhydrol (12.66 g, 50 mmol) in CH2 Cl2 (200 mL) under nitrogen, thionyl chloride (10 mL, 137 mmol) was added dropwise over 15 min. After 18 h and removal of the solvent in vacuo, the crude product was dissolved in CH2 Cl2 (100 mL) and washed with saturated NaHCO3 (3*), dried over Na2 SO4, and concentrated in vacuo to a thin, amber oil (12.53 g). Upon standing at room temperature for 1 h, crystallization occured to give pure product (12.5 g, 88.4%) as a white solid, mp 61°-64° C. DCI/MS (M+1) 235. 400 MHz 1 H NMR (CDCl3) δ: 7.35 (m, 8H), 6.05 (s, 1H). Anal. Calcd. for C13 H9 C13: C, 57.49; H, 3.34. Found: C, 57.69; H, 3.46. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
In water; N-ethyl-N,N-diisopropylamine | 5 [Preparation of N-Cyclopropyl-6-[4-[bis(4-chlorophenyl)methyl]-1-piperazinyl]hexanesulfonamide] Example 5 [Preparation of N-Cyclopropyl-6-[4-[bis(4-chlorophenyl)methyl]-1-piperazinyl]hexanesulfonamide] 1-[Bis(4-chlorophenyl)methyl]piperazine (10.00 g, 31.13 mmol) and N-cyclopropyl-6-chlorohexanesulfonamide (8.30 g, 34.63 mmol) were refluxed in N-ethyldiisopropylamine (50 ml) for 7 hours. The reaction mixture was concentrated in vacuo, and water was added thereto. The mixture was extracted with chloroform. The chloroform layer was washed with water, and dried over anhydrous magnesium sulfate. Subsequently, the solvent was removed by evaporation in vacuo. The resulting crude product was purified by column chromatography on silica gel with chloroform-methanol (20:1), to give N-cyclopropyl-6-[4-[bis(4-chlorophenyl)methyl]-1-piperazinyl]hexanesulfonamide (14.70 g) as an oil (yield based on 1-[bis(4-chlorophenyl)methyl]piperazine: 95.3%). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
92.2% | In water; N-ethyl-N,N-diisopropylamine | 33 [Preparation of N-(2-Hydroxyethyl)-6-[4-[bis(4-chlorophenyl)methyl]-1-Piperazinyl]hexanesulfonamide] Example 33 [Preparation of N-(2-Hydroxyethyl)-6-[4-[bis(4-chlorophenyl)methyl]-1-Piperazinyl]hexanesulfonamide] 1-[Bis(4-chlorophenyl)methyl]piperazine (642.5 mg, 2.00 mmol) and N-(2-hydroxyethyl)-6-chlorohexanesulfonamide (487.5 mg, 2.00 mmol) were refluxed in N-ethyldiisopropylamine (2 ml) for 6 hours. The reaction mixture was concentrated in vacuo, and water was added thereto. The mixture was extracted with chloroform. The chloroform layer was washed with water, and dried over anhydrous magnesium sulfate. Subsequently, the solvent was removed by evaporation in vacuo. The resulting crude product was purified by column chromatography on silica gel with chloroform-methanol (20:1), to give N-(2-hydroxyethyl)-6-[4-[bis(4-chlorophenyl)methyl]-1-piperazinyl]hexanesulfonamide (975.0 mg) as a pale brown oil (92.2%). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
97.5% | In water; N-ethyl-N,N-diisopropylamine | 34 [Ppreparation of N-(2-Hydroxyethyl)-5-[4-[bis(4-chlorophenyl)methyl]-1-piperazinyl]pentanesulfonamide] Example 34 [Ppreparation of N-(2-Hydroxyethyl)-5-[4-[bis(4-chlorophenyl)methyl]-1-piperazinyl]pentanesulfonamide] 1-[Bis(4-chlorophenyl)methyl]piperazine (642.5 mg, 2.00 mmol) and N-(2-hydroxyethyl)-5-chloropentanesulfonamide (459.5 mg, 2.00 mmol) were refluxed in N-ethyldiisopropylamine (2 ml) for 6 hours. The reaction mixture was concentrated in vacuo, and water was added thereto. The mixture was extracted with chloroform. The chloroform layer was washed with water, and dried over anhydrous magnesium sulfate. Subsequently, the solvent was removed by evaporation in vacuo. The resulting crude product was purified by column chromatography on silica gel with chloroform-methanol (20:1), to give N-(2-hydroxyethyl)-5-[4-[bis(4-chlorophenyl)methyl]-1-piperazinyl]pentanesulfonamide (1003.0 mg) as a pale brown oil (97.5%). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
90% | With dmap; triethylamine In 1,2-dichloro-ethane at 20℃; | 8 To a 0.075 M 1,2-dicholoroethane solution of l-(4,4'-dichlorobenzhydryl)piperazine (450 μL, 33.8 μmol), triethylamine (4 mg, 40.5 μmol), and DMAP (0.4 mg, 3.4 μmol) was added 300 μL of a 0.125 M solution of 2,5-diflourobenzoyl chloride (37.5 μmol) in 1,2- dichloroethane. The mixture was stirred overnight at room temperature then filtered on hydromatrix-filled filter pre-treated with 500 μL of 2 N NaOH solution. The hydromatrix was washed with 500 μL of dichloromethane and evaporated to dryness in the Genevac. Estimated yield from combichem plate: 14.0 mg (90%). 1H NMR (500 MHz, DMSO-d6) δ EPO 2.26 (s, br, 2H), 2.36 (s, br, 2H), 3.26 (s, br, 2H), 3.67 (s, br 2H), 4.48 (s, IH), 7.27-7.34 (m, 3H), 7.38 (d, J= 8.0 Hz, 4H), 7.44 (d, J= 8.0 Hz, 4H); +ES MS (M+l) 460.1. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
90% | With dmap; triethylamine In 1,2-dichloro-ethane at 20℃; | 4 To a 0.075 M 1,2-dicholoroethane solution of l-(4,4'-dichlorobenzhydryl)piperazine (450 μL, 33.8 μmol), triethylamine (1.2 eq, 4 mg, 40.5 μmol), and DMAP (10 mol%, 0.4 mg, 3.4 μmol) was added 300 μL of a 0.125 M solution of 4-fluorobenzoyl chloride (37.5 μmol) in 1,2-dichloroethane. The mixture was stirred overnight at room temperature, then filtered on hydromatrix-filled filter pre-treated with 500 μL of 2 N NaOH solution. The hydromatrix was washed with 500 μL of dichloromethane and evaporated to dryness in the Genevac. Estimated yield from combichem plates: 13.4 mg (90%). 1H NMR (500 MHz, DMSO-de) δ 2.20-2.40 (m, 4H), 3.30-3.50 (m, 4H), 4.46 (s, IH), 7.25 (dd, J= 8.5, 8.5 Hz5 2H), 7.38 (d, J= 8.0 Hz, 4H), 7.43-7.45 (m, 6H); +ES MS (M+l) 442.1. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
72% | With dmap; triethylamine In 1,2-dichloro-ethane at 20℃; | 12 To a 0.075 M 1,2-dicholoroethane solution of l-(4,4'-dichlorobenzhydtyl)piperazine (450 μL, 33.8 μmol), triethylamine (4 mg, 40.5 μmol), and DMAP (0.4 mg, 3.4 μmol) was added 300 μL of a 0.125 M solution of 3,5-bis(trifluoromethyl)benzoyl chloride (37.5 μmol) in 1 ,2-dichloroethane. The mixture was stirred overnight at room temperature, then filtered on hydromatrix-filled filter pre-treated with 500 μL of 2 N NaOH solution. The hydromatrix was washed with 500 μL of dichloromethane and evaporated to dryness in the Genevac. Estimated yield from combichem plate: 13.6 mg (72%). 1H NMR (SOO MHZ, DMSO-d6) 52.27 (s, 2H), 2.40 (s, br, 2H), 3.4 (s, br, 4H), 4.47 (s, IH), 7.39 (d, J= 8.0 Hz, 4H), 7.44 (d, 7= 8.0 Hz, 4H), 8.10 (s, 2H), 8.21 (s, IH); +ES MS (M+l) 560.1 |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
90% | With dmap; triethylamine In 1,2-dichloro-ethane at 20℃; | 5 To a 0.075 M 1,2-dicholoroethane solution of l-(4,4'-dichlorobenzhydryl)piperazine (450 μL, 33.8 μmol), triethylamine (1.2 eq, 4 mg, 40.5 μmol), and DMAP (10 mol%, 0.4 mg, 3.4 μmol) was added 300 μL of a 0.125 M solution of 3-fluorobenzoyl chloride (37.5 μmol) in 1,2-dichloroethane. The mixture was stirred overnight at room temperature, then filtered on hydromatrix-filled filter pre-treated with 500 μL of 2N NaOH solution. The hydromatrix was washed with 500 μL of dichloromethane and evaporated to dryness in the Genevac. Estimated yield from combichem plates: 13.5 mg (90%). 1H NMR (500 MHz, EPO DMSO-(I6) δ 2.20-2.40 (m, 4H), 3.30-3.50 (m, 4H), 4.46 (s, IH), 7.21 (dd, J= 7.5, 7.5 Hz, 2H), 7.25-7.30 (m, IH), 7.38 (d, J= 8.0 Hz, 4H), 7.32-7 '.47 (m, 6H); +ES MS (M+l) 442.1. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
90% | With dmap; triethylamine In 1,2-dichloro-ethane at 20℃; | 9 To a 0.075 M 1,2-dicholoroethane solution of l-(4,4'-dichlorobenzhydryl)piperazine (450 μL, 33.8 μmol), triethylamine (4 mg, 40.5 μmol), and DMAP (0.4 mg, 3.4 μmol) was added 300 μL of a 0.125 M solution of 2-fluorobenzoyl chloride (37.5 μmol) in 1,2- dichloroethane. The mixture was stirred overnight at room temperature, then filtered on hydromatrix-filled filter pre-treated with 500 μL of 2N NaOH solution. The hydromatrix was washed with 500 μL of dichloromethane and evaporated to dryness in the Genevac. Estimated yield from combichem plate: 13.5 mg (90%). 1H NMR (500 MHz, DMSOd5) δ 2.26 (s, br, 2H), 2.37 (s, br, 2H), 3.25 (s, br, 2H), 3.68 (s, br, 2H), 4.48 (s, IH), 7.25-7.29 (m, 2H), 7.36-7.39 (m, 5H), 7.43-7.49 (m, 5H); +ES MS (M+l) 442.1. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
81% | With dmap; triethylamine In 1,2-dichloro-ethane at 20℃; | 7 To a 0.075 M 1,2-dicholoroethane solution of l-(4,4'-dichlorobenzhydryl)piperazine (450 μL, 33.8 μmol), triethylamine (4 mg, 40.5 μmol), and DMAP (0.4 mg, 3.4 μmol) was added 300 μL of 0.125 M solution of a 3-trifluoromethylbenzoyl chloride (37.5 μmol) in 1,2-dichloroethane. The mixture was stirred overnight at room temperature, then filtered on hydromatrix-filled filter pre-treated with 500 μL of 2N NaOH solution. The hydromatrix was washed with 500 μL of dichloromethane and evaporated to dryness in the Genevac. Estimated yield from combichem plate: 13.5 mg (81%). 1H NMR (500 MHz, DMSOd6) δ 2.20-2.45 (m, 4H), 4.47 (s, IH), 7.38 (d, J= 8.0 Hz, 4H), 7.44 (d, J= 8.0 Hz, 4H), 7.65-7.71 (m, 3H), 7.81 (d, J= 5.0 Hz, IH); +ES MS (M+l) 492.1. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
85% | With dmap; triethylamine In 1,2-dichloro-ethane at 20℃; | 11 To a 0.075 M 1,2-dicholoroethane solution of l-(4,4'-dichIorobenzhydryl)piperazine (450 μL, 33.8 μmol), triethylamine (4 mg, 40.5 μmol), and DMAP (0.4 mg, 3.4 μmol) was added 300 μL of a 0.125 M solution of n-pentanoyl chloride (37.5 μmol) in 1,2- dichloroethane. The mixture was stirred overnight at room temperature, then filtered on hydromatrix-filled filter pre-treated with 500 μL of 2N NaOH solution. The hydromatrix was washed with 500 μL of dichloromethane and evaporated to dryness in the Genevac. Estimated yield from combichem plate: 11.6 mg (85%). 1H NMR (500 MHz, DMSO-d6) δ 0.86 (t, J= 5.0 Hz, 3H), 1.26 (m, 4H), 1.44 (t, J= 5.0 Hz, 2H), 2.25 (m, 6H), 3.46 (s, br, 2H), 4.43 (s, IH), 7.39 (d, J= 10.0 Hz, 4H), 7.44 (d, J= 10.0 Hz, 4H); +ES MS (M+l) 404.1. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
88% | With dmap; triethylamine In 1,2-dichloro-ethane at 20℃; | 10 To a 0.075 M 1,2-dicholoroethane solution of l-(4)4'-dichlorobenzhydryl)piperazine (450 μL, 33.8 μmol), triethylamine (1.2 eq, 4 mg, 40.5 μmol), and DMAP (10 mol%, 0.4 mg, 3.4 μmol) was added 300 μL of a 0.125 M solution of cyclobutanecarbonyl chloride (37.5 μmol) in 1,2-dichloroethane. The mixture was stirred overnight at room temperature, then EPO filtered on hydromatrix-filled filter pre-treated with 500 μL of 2N NaOH solution. The hydromatrix was washed with 500 μL of dichloromethane and evaporated to dryness in the Genevac. Estimated yield from combichem plate: 11.8 mg (88%). 1H NMR (SOO MHZ, DMSO-de) 50.87 (m, IH), 1.30 (m, IH), 1.46 (m, IH), 1.71 (m, IH), 1.85 (m, IH), 2.04 (d, J= 9.0 Hz, IH), 2.11 (m, IH), 2.23 (s, 4H), 3.30 (s, br, 2H), 3,45 (s, br, 2H), 4.41 (s, IH), 7.38 (d, /= 8.5 Hz, 4H), 7.43 (d, /= 8.5 Hz, 4H); +ES MS (M+l) 402.1. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
79% | With dmap; triethylamine In 1,2-dichloro-ethane at 20℃; | 3 To a 0.075 M 1,2-dicholoroethane solution of l-(4,4'-dichlorobenzhydryl)piperazine (450 μL, 33.8 μmol), triethylamine (1.2 eq, 4 mg, 40.5 μmol), and DMAP (10 mol%, 0.4 mg,3.4 μmol) was added 300 μL of a 0.125 M solution of 2-chloronicotinoyl chloride (37.5 μmol) in 1,2-dichloroethane. The mixture was stirred overnight at room temperature, then filtered on hydromatrix-filled filter pre-treated with 500 μL of 2 N NaOH solution. The hydromatrix was washed with 500 μL of dichloromethane and evaporated to dryness in the Genevac. Estimated yield from combichem plate: 12.3 mg (79%). 1H NMR (SOO MHZ, DMSO-dg) δ 2.27 (s, 2H), 2.3-2.45 m, 2H), 3.19 (s, 2H), 3.60-3.75 (m, 2H), 7.38 (d, J=8.5 Hz, 4H), 7.44 (d, J= 8.5 Hz, 4H), 7.50 (dd, J= 6.5, 6.5 Hz, IH), 7.86 (d, J= 7.0 Hz, IH), 8.45 (s, IH); +ES MS (M+l) 459.1. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
89% | Stage #1: [3-(diphenylmethyl)-2-oxo-2,3-dihydro-1H-imidazol-1-yl]acetic acid; 1-(4,4'-dichloro-benzhydryl)-piperazine With 1-ethyl-(3-(3-dimethylamino)propyl)-carbodiimide hydrochloride In N,N-dimethyl-formamide at 20℃; for 5h; Stage #2: With sodium hydrogencarbonate In dichloromethane; water | 2 -[Bis(4-chlorophenyl)methyl]piperazine (343 mg, 1.07 mmol) was added to a solution of [3-(diphenylmethyl)-2-oxo-2,3-dihydro-lH-imidazol-l-yl]acetic acid (300 mg, 0.97 mmol) EPO and EDC (205 mg, 1.07 mmol) in DMF (50 mL) at ambient temperature. The reaction mixture was stirred for 5 hours and the solvent was concentrated. The residue was recovered in DCM and washed with water, sat. NaHCCb solution, and brine. The solution was dried over anhydrous MgSO4, filtered and concentrated. The crude product was purified on silica gel by flash chromatography using 2.5% MeOH in DCM as eluent to provide the title compound as a white powder: 532 mg (89%). 1H NMR (400 MHz, CDCl3) δ 2.26 - 2.41 (m, 4H), 3.46 - 3.55 (m, 2H), 3.56 - 3.68 (m, 2H), 4.18 (s, IH), 4.45 (s, 2H), 6.09 (d, J= 3.1 Hz, IH), 6.35 (d, J= 3.1 Hz, IH), 6.54 - 6.62 (m, IH), 7.09 - 7.19 (m, 3H), 7.21 - 7.39 (m, 15H); +ES MS (M+l) 611.2. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With benzotriazol-1-ol; dicyclohexyl-carbodiimide In N,N-dimethyl-formamide at 20℃; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With benzotriazol-1-ol; dicyclohexyl-carbodiimide In N,N-dimethyl-formamide at 20℃; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With benzotriazol-1-ol; dicyclohexyl-carbodiimide In N,N-dimethyl-formamide at 20℃; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With triethylamine In dichloromethane at 20℃; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With triethylamine In dichloromethane at 20℃; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With triethylamine In dichloromethane at 20℃; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With triethylamine In dichloromethane at 20℃; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With benzotriazol-1-ol; dicyclohexyl-carbodiimide In N,N-dimethyl-formamide at 20℃; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With benzotriazol-1-ol; dicyclohexyl-carbodiimide In N,N-dimethyl-formamide at 20℃; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With triethylamine In dichloromethane at 20℃; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With triethylamine In dichloromethane at 20℃; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With triethylamine In dichloromethane at 20℃; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With triethylamine In dichloromethane at 20℃; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
44% | With triethylamine In dichloromethane at 20℃; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
70% | With triethylamine In dichloromethane at 20℃; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With triethylamine In dichloromethane at 20℃; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With triethylamine In dichloromethane at 20℃; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With triethylamine In dichloromethane at 20℃; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With triethylamine In dichloromethane at 20℃; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With benzotriazol-1-ol; dicyclohexyl-carbodiimide In N,N-dimethyl-formamide at 20℃; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With triethylamine In dichloromethane at 20℃; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With benzotriazol-1-ol; dicyclohexyl-carbodiimide In N,N-dimethyl-formamide at 20℃; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
43% | With triethylamine In dichloromethane at 20℃; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With benzotriazol-1-ol; dicyclohexyl-carbodiimide In N,N-dimethyl-formamide at 20℃; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With triethylamine In dichloromethane at 20℃; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With benzotriazol-1-ol; dicyclohexyl-carbodiimide In N,N-dimethyl-formamide at 20℃; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
62% | With benzotriazol-1-ol; dicyclohexyl-carbodiimide In N,N-dimethyl-formamide at 20℃; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
74% | With triethylamine In dichloromethane at 20℃; for 2h; | (4-(bis(4-chlorophenyl)methyl)piperazin-1-yl)(5-methyl-4-nitroisoxazol-3-yl)methanone (2y) General procedure: 5-methyl-4-nitroisoxazole-3-carbonyl chloride 5 (33 mg, 0.17 mmol) was dissolved in dichloromethane (1ml) at room temperature and 1-(bis(4-chlorophenyl)methyl)piperazine 9 (55 mg, 0.17 mmol) was added, along with one drop of triethylamine. After stirring for 2 hours, TLC shows complete conversion. The mixture was dissolved in dichloromethane and washed with a saturated aqueous solution of sodium bicarbonate (2 x 10 ml). The organic phase was dried over sodium sulfate, filtered, and concentrated. The crude mixture was purified on silica gel using a gradient of ethyl acetate in hexanes to afford the final product 2y (61 mg) as a white solid (0.128 mmol, 74%). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
62% | Stage #1: bis(trichloromethyl) carbonate; methyl d,l-2-hydroxy-3,3,3-trifluoropropionate With N-ethyl-N,N-diisopropylamine In dichloromethane for 2h; Stage #2: 1-(4,4'-dichloro-benzhydryl)-piperazine In dichloromethane for 2h; | 36 Example 36: l,l,l-trifluoro-3-methoxy-3-oxopropan-2-yl 4-(bis(4- chlorophenyl)methyl)piperazine-l-carboxylate (6h) To a stirring solution of triphosgene (65 mg, 0.22 mmol) in (( (5.0 mL) was added methyl-3,3,3-trifluoro-DL-lactate (116 mg, 0.73 mmol) followed by N,N- diisopropylethylamine (0.38 mL, 2.19 mmol). After 2 h, l-(bis(4- chlorophenyl)methyl)piperazine (160 mg, 0.50 mmol) was added as a solution in (( (2 mL) and stirred for another 2 h. The mixture was concentrated under reduced pressure and purified directly by S1O2 flash chromatography (25% EtOAc/hexanes) to provide the titled compound (156 mg, 62%): 'H NMR 500 MHz (CDC13) δ 7.31 (d, J= 8.47 Hz, 4H), 7.26 (d, J = 8.41 Hz, 4H), 5.43 (q, J= 7.03 Hz, 1H), 4.23 (s, 1H), 3.85 (s, 3H), 3.66 - 3.46 (m, 4H), 2.44 - 2.32 (m, 4H); HRMS m/z calc'd for [M+H]+ C22H21Cl2F3 204: 505.0903, found 505.0905. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 2 steps 1.1: N-ethyl-N,N-diisopropylamine / dichloromethane / 2 h 1.2: 2 h 2.1: sodium hydroxide; water / 1,4-dioxane / 20 °C |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 2 steps 1.1: N-ethyl-N,N-diisopropylamine / dichloromethane / 2 h 1.2: 2 h 2.1: tetrahydrofuran / 24 h / 20 °C |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With pyridine In dichloromethane at 0 - 20℃; for 5.33333h; Inert atmosphere; | 41.3 Step 3: Pre aration of 4-(bis(4-chlorophenyl)methyl)piperazine-l-carbonyl chloride Step 3: Pre aration of 4-(bis(4-chlorophenyl)methyl)piperazine-l-carbonyl chloride [00175] To a stirring solution of triphosgene (460 mg, 1.56 mmol, 0.5 equiv) in anhydrous (( (25 mL) at 0 °C under 2 was added pyridine (0.25 mL, 3.11 mmol, 1.0 equiv). After stirring for 5 min, l-(bis(4-chlorophenyl)methyl)piperazine (3.11 mmol, 1.0 equiv) was added in small portions over 15 min. The reaction mixture was stirred for 1 h and then allowed to warm to room temperature. After stirring for an additional 4 h, the reaction mixture was quenched with cold HC1 (10 mL, 1.0 N), and the product was extracted with CH2CI2 (3 x 20 mL). The combined organic layers were washed with saturated aHC03 (2 x 20 mL), dried over anhydrous Na2S04, and concentrated under reduced pressure. The crude 4- (bis(4-chlorophenyl)methyl)piperazine-l-carbonyl chloride was used without further purification. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 2 steps 1: pyridine / dichloromethane / 5.33 h / 0 - 20 °C / Inert atmosphere 2: 4-methyl-morpholine; dmap / dichloromethane / 20 °C |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 2 steps 1.1: tetrabutyl-ammonium chloride; potassium carbonate / water / 0.25 h / 20 °C 1.2: 2 h / 100 °C 2.1: sodium hydride / N,N-dimethyl-formamide; mineral oil / 0 - 20 °C 2.3: 0 - 20 °C |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Stage #1: 1-(4,4'-dichloro-benzhydryl)-piperazine With tetrabutyl-ammonium chloride; potassium carbonate In water at 20℃; for 0.25h; Stage #2: 2-(2-Chloroethoxy)ethanol In water; acetonitrile at 100℃; for 2h; Stage #3: trifluoroacetic acid In water; acetonitrile | 2-(2-(4-(bis(4-Chlorophenyl)methyl)piperazin- 1 -yl)ethoxy)ethanol . A solution of l-(bis(4-chlorophenyl)methyl)piperazine (100 mg, 0.31 1 mmol) in H20 (1.50 mL) was treated with K2C03 (86.0 mg, 0.623 mmol) and tetrabutylammonium chloride (87.0 mg, 0.31 1 mmol). The resulting mixture was stirred at room temperature for 15 min, then 2-(2-chloroethoxy)ethanol (38.8 mg, 0.31 1 mmol) in acetonitrile (1.50 mL) was added to the mixture. The resulting reaction mixture was heated to 100 °C for 2 h, after which LCMS analysis showed completion. The reaction mixture was diluted with EtOAc and washed with H20 and brine. The organic layer was separated, dried over MgS04, filtered and concentrated. Residue was purified by preparative HPLC to afford the title compound as the TFA salt. NMR (400 MHz, DMSO-d6) δ ppm 9.34 (s, 1H), 7.47 - 7.36 (m, 8H), 4.58 (s, 1H), 3.72 (t, J = 4.9 Hz, 2H), 3.55 - 3.49 (m, 4H), 3.49 - 3.42 (m, 4H), 3.13 (d, J = 1 1.5 Hz, 3H), 2.80 (d, J = 12.9 Hz, 2H), 2.27 (t, J = 12.2 Hz, 2H). LCMS RT (Method 1) = 4.716 min, m/z 410.4 [M+H+]. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Stage #1: 1-(4,4'-dichloro-benzhydryl)-piperazine With tetrabutyl-ammonium chloride; potassium carbonate In water at 20℃; for 0.25h; Stage #2: 2-(2-Chloroethoxy)ethanol In water; acetonitrile at 100℃; for 2h; Stage #3: trifluoroacetic acid In water; acetonitrile |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
50% | With O-(benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium tetrafluoroborate; N-ethyl-N,N-diisopropylamine In dichloromethane at 20℃; | 1-(4-(bis(4-chlorophenyl)methyl)piperazin-1-yl)but-3-en-1-one (71): TBTU (600 mg, 1.87mmol, 2.1 eq.), DIPEA (352 μL, 2.02 mmol, 1.3 eq.), and 1-(bis(4-chlorophenyl)methyl)piperazine(500 mg, 1.56 mmol, 1 eq.) were added to a solution of 3-butenoic acid (157 μL, 1.87 mmol, 1.2eq.) in dry DCM (10 mL). The reaction was stirred at rt overnight. The reaction was washed withwater and the organic layer was concentrated under reduced pressure. Purification by flashcolumn chromatography (0-100% EtOAc/hexanes gradient) afforded the title compound (303 mg,50% yield) as a white foam. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
81% | With O-(benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium tetrafluoroborate; N-ethyl-N,N-diisopropylamine In dichloromethane at 20℃; for 2h; | 1-(4-(bis(4-chlorophenyl)methyl)piperazin-1-yl)prop-2-yn-1-one (16): Propiolic acid (79 mg,1.12 mmol, 1.2 eq.) was dissolved in dry DCM (5 mL). TBTU (450 mg, 1.40 mmol, 1.5 eq.), DIPEA(244 μL, 1.40 mmol, 1.5 eq.), and 1-(bis(4-chlorophenyl)methyl)piperazine (300 mg, 0.93 mmol,1 eq.) were added and the reaction was stirred at rt for 2 h. The reaction was washed with waterand the organic layer was collected and concentrated under reduced pressure. Purification byflash column chromatography (30% EtOAc/hexanes) afforded the product (282 mg, 81% yield)as a white solid. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
82% | With O-(benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium tetrafluoroborate; N-ethyl-N,N-diisopropylamine In dichloromethane at 20℃; for 2h; | 1-(4-(bis(4-chlorophenyl)methyl)piperazin-1-yl)but-2-yn-1-one (18): Tetrolic acid (98 mg, 1.17mmol, 1.5 eq.) was dissolved in dry DCM (5 mL). TBTU (375 mg, 1.17 mmol, 1.5 eq.), DIPEA(112 μL, 1.17 mmol, 1.5 eq.), and 1-(bis(4-chlorophenyl)methyl)piperazine (250 mg, 0.78 mmol,1 eq.) were added and the reaction was stirred at rt for 2 h. The reaction was washed with waterand the organic layer was collected and concentrated under reduced pressure. Purification byflash column chromatography (30% EtOAc/hexanes) afforded the product (246 mg, 82% yield)as a white solid. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
74% | With dicyclohexyl-carbodiimide at 20℃; for 1h; | 1-(4-(bis(4-chlorophenyl)methyl)piperazin-1-yl)-3-(trimethylsilyl)prop-2-yn-1-one (17): Asolution of 1-(bis(4-chlorophenyl)methyl)piperazine (25 mg, 0.78 mmol, 1 eq.), 3-(trimethylsilyl)-propynoic acid (144 mg, 1.01 mmol, 1.3 eq.), and DCC (185 mg, 0.89 mmol, 1.15 eq.) were stirredat rt for 1 h. The reaction was filtered through Celite and purified by flash column chromatography(0-30% EtOAc/hexanes). The title compound (261 mg, 74% yield) was obtained as a white solid. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 2 steps 1: triethylamine / dichloromethane / 20 °C 2: sodium hydrogencarbonate / ethyl acetate / 72 h / 20 °C |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 2 steps 1: N-ethyl-N,N-diisopropylamine; O-(benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium tetrafluoroborate / dichloromethane / 20 °C 2: sodium hydrogencarbonate / ethyl acetate / 72 h / 20 °C |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
39% | With triethylamine In dichloromethane at 20℃; | 1-(4-(bis(4-chlorophenyl)methyl)piperazin-1-yl)-2-chloroethan-1-one (15): As describedpreviously,3,5 a solution of 1-(bis(4-chlorophenyl)methyl)piperazine (500 mg, 1.56 mmol, 1 eq.)and triethylamine (282 μL, 2.02 mmol, 1.3 eq.) in dry DCM (5 mL) was cooled in an ice bath.Chloroacetyl chloride (149 μL, 1.87 mmol, 1.2 eq.) was added dropwise and the reaction wasstirred overnight at rt. The mixture was concentrated under reduced pressure and purified by flashcolumn chromatography (0-100% EtOAc/hexanes gradient) to afford the title compound (241 mg,39% yield) as a white solid. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
50% | With triethylamine In dichloromethane at 20℃; | 1-(4-(bis(4-chlorophenyl)methyl)piperazin-1-yl)prop-2-en-1-one (19): A solution of 1-(bis(4-chlorophenyl)methyl)piperazine (160 mg, 0.50 mmol, 1 eq.) and triethylamine (130 μL, 0.75 mmol,1.5 eq.) in dry DCM (2 mL) was cooled in an ice bath. Acryloyl chloride (60 μL, 0.75 mmol, 1.5eq.) was added dropwise and the reaction was stirred overnight at rt. The mixture wasconcentrated under reduced pressure and purified by flash column chromatography (0-100%EtOAc/hexanes gradient) to afford the title compound (93 mg, 50% yield) as a white solid. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
63% | With O-(benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium tetrafluoroborate; N-ethyl-N,N-diisopropylamine In dichloromethane at 20℃; | (E)-1-(4-(bis(4-chlorophenyl)methyl)piperazin-1-yl)but-2-en-1-one (20): Crotonic acid (322 mg,3.74 mmol, 1 2 eq.) was dissolved in dry DCM (30 mL) and cooled in an ice bath. TBTU (1.2 g,3.74 mmol, 1.2 eq.), DIPEA (705 μL, 4.05 mmol, 1.3 eq.), and 1-(bis(4-chlorophenyl)methyl)piperazine (1.0 g, 3.11 mmol, 1 eq.) were added in succession. The mixturewas stirred overnight at rt, washed with water, and the organic layer was concentrated underreduced pressure. Purification by flash column chromatography (0-100% EtOAc/hexanesgradient) afforded the title compound (765 mg, 63% yield) as a white solid. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
54% | With triethylamine In dichloromethane at 20℃; | (E)-methyl 4-(4-(bis(4-chlorophenyl)methyl)piperazin-1-yl)-4-oxobut-2-enoate (21). To asuspension of mono methyl fumarate (20 mg, 0.153 mmol, 1.0 eq.) in DCM (800 μL) was addedoxalyl chloride (26 μL, 306 μmol, 2.0 eq.), followed by DMF (1 drop). The mixture was stirred at rtfor 2 h and then concentrated to give the acid chloride as a yellow solid that was used directly inthe next step. To a solution of 1-(bis(4-chlorophenyl)methyl)piperazine (46 mg, 0.143 mmol, 1.0eq.) in DCM (500 μL), was added triethylamine (30 μL, 0.214 mmol, 1.5 eq.), followed by a 0.5 Msolution of methyl fumaryl chloride (300 μL, 0.150 mmol, 1.05 eq.) in DCM. The mixture was stirred at rt overnight and concentrated. Purification by flash column chromatography on silica gel(0-50% EtOAc/hexanes) afforded the title compound (37 mg, 54% yield) as a yellow solid. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With triethylamine In dichloromethane at 20℃; Overall yield = 30 percent; Overall yield = 18 mg; | 2-(4-(bis(4-chlorophenyl)methyl)piperazine-1-carbonyl)but-2-enenitrile (22). To a solution of(E)-2-cyanobut-2-enoic acid (17 mg, 153 μmol, 1.0 eq.) in DCM (800 μL) was added oxalylchloride (26 μL, 306 μmol, 2.0 eq.) followed by DMF (1 drop). The mixture was stirred at rt for 2h and concentrated to give the acid chloride as a brown oil that was used directly in the next step.To a solution of 1-(bis(4-chlorophenyl)methyl)piperazine (46 mg, 143 μmol, 1.0 eq.) in DCM (500μL) was added triethylamine (30 μL, 214 μmol, 1.5 eq.), followed by a 0.5 M solution ofcyanobutenoyl chloride (300 μL, 150 μmol, 1.05 eq.) in DCM. The mixture was stirred at rtovernight and concentrated. Purification by flash column chromatography on silica gel (0-50%EtOAc/hexanes) afforded the title compound (18 mg, 30% yield) as a ~4:1 mix of alkene isomers. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
33% | With N-ethyl-N,N-diisopropylamine In dichloromethane at 20℃; | 1-(4-(bis(4-chlorophenyl)methyl)piperazin-1-yl)propane-1,2-dione (23): Sodium pyruvate (514mg, 4.67 mmol, 3 eq.) was suspended in dry DCM (5 mL) and oxalyl chloride (0.53 mL, 6.23 mmol,4 eq.) was added followed by 1 drop of DMF. The reaction was stirred overnight at rt, filtered, andconcentrated in vacuo. The residue was suspended in dry DCM (4 mL) and cooled in an ice bath.A solution of 1-(bis(4-chlorophenyl)methyl)piperazine (500 mg, 1.56 mmol, 1 eq.) and DIPEA(0.41 mL, 2.33 mmol, 1.5 eq.) in DCM (1 mL) was added slowly. The reaction was warmed to rtand stirred overnight. After washing the reaction with water, the organic layer was concentratedand dried over Na2SO4. Purification by flash column chromatography (0-25% EtOAc/hexanes)afforded the title compound (199 mg, 33% yield). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
98% | With O-(benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium tetrafluoroborate; N-ethyl-N,N-diisopropylamine In dichloromethane at 20℃; | General Procedure for ML210 analog synthesis (25-29) General procedure: The following ML210 analogs were prepared by stirring overnight a rt solution of 1-(bis(4-chlorophenyl)methyl)piperazine (30 mg, 0.09 mmol, 1 eq.), TBTU (45 mg, 0.14 mmol, 1.5 eq.),DIPEA (20 μL, 0.14 mmol, 1.5 eq.), and the indicated carboxylic acid (0.11 mmol, 1.2 eq.) in dryDCM (1 mL). The reaction was partitioned between DCM and water and the organic layer wasseparated and concentrated under reduced pressure. Purification by flash columnchromatography (0-100% EtOAc/hexanes gradient) afforded the desired compounds. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
99% | With O-(benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium tetrafluoroborate; N-ethyl-N,N-diisopropylamine In dichloromethane at 20℃; | General Procedure for ML210 analog synthesis (25-29) General procedure: The following ML210 analogs were prepared by stirring overnight a rt solution of 1-(bis(4-chlorophenyl)methyl)piperazine (30 mg, 0.09 mmol, 1 eq.), TBTU (45 mg, 0.14 mmol, 1.5 eq.),DIPEA (20 μL, 0.14 mmol, 1.5 eq.), and the indicated carboxylic acid (0.11 mmol, 1.2 eq.) in dryDCM (1 mL). The reaction was partitioned between DCM and water and the organic layer wasseparated and concentrated under reduced pressure. Purification by flash columnchromatography (0-100% EtOAc/hexanes gradient) afforded the desired compounds. |
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(R)-1-((4-Chlorophenyl)(phenyl)methyl)piperazine dihydrochloride
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[ 300543-56-0 ]
(R)-1-((4-Chlorophenyl)(phenyl)methyl)piperazine
Similarity: 1.00