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CAS No. : | 59507-44-7 |
Formula : | C12H16N2O2 |
M.W : | 220.27 |
SMILES Code : | O=[N+](C1=CC=C(C=C1)CN2CCCCC2)[O-] |
MDL No. : | MFCD01453278 |
InChI Key : | PAMJENUKCYUKLC-UHFFFAOYSA-N |
Pubchem ID : | 783541 |
GHS Pictogram: |
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Signal Word: | Warning |
Hazard Statements: | H302-H315-H319-H335 |
Precautionary Statements: | P261-P305+P351+P338 |
* 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 |
---|---|---|
100% | With platinum(IV) oxide; hydrogen; In ethanol; under 2585.81 Torr; for 16h; | General procedure: These amines were required for the syntheses of 4 and 20 respectively. To a solution of 4-nitrobenzylchloride (1 mmol) in anhydrous THF (3 mL) was added 1-methylpiperazine or piperidine (1 mmol) and triethylamine (1.5 mmol, 0.21 mL). The solution was heated at 70 C overnight. The reaction mixture was then extracted with dichloromethane and water. The organic fractions were combined, dried over anhydrous Na2SO4, and concentrated under reduced pressure. The residue was purified by column chromatography (hexane/EA 1:4) and characterized by 1H NMR (Supplementary Information). It was dissolved in 10 mL ethanol, PtO2 (0.01 g) was added under nitrogen. Hydrogenation was carried out on a Parr hydrogenator at 50 psi for 16 h. The catalyst was then removed by filtration and the filtrate was concentrated in vacuo to give the amine in quantitative yield. |
92% | With palladium on activated charcoal; hydrogen; In methanol; for 6h; | 11c (2.20 g, 10 mmol) was dissolved in a methanol solvent,Under nitrogen protection, 200 mg of Pd / C was added,And then through the H2 reaction,6h after the reaction is complete.Filter, collect the filtrate, concentrate,To give 1.75 g of a solid. Yield 92%. |
84% | NaB(OAc)3H (6.6 mmol, 1.4 g) was added to a mixture of 4-nitro-benzaldehydeCompound 4a (6.0 mmol, 0.9 g), piperidine Compound 5a (9.0 mmol, 0.9 mL) and glacialacetic acid (5 drops) in CH2C12 (50 mL) and the resulting suspension was stirred at r.t.overnight. The reaction mixture was made basic with a 2N NaOH solution and extracted withCH2C12. The organic layer was washed with brine, then separated and dried over Na2SO4. Thedrying agent was filtered and the solvent was removed in vacua. The product was purified byflash column chromatography (10:1 EtOAciMeOH) to yield l-(4-nitro-benzyl)-piperidineCompound 5b as a yellow oil (0.89 g, 67% yield). MS m/e 221 (M+H, 100%).; SnCl2.2H2O (10.0 mmol, 2.25 g) was added to a sqlution of Compound 5b (5.0 mmol,i ?'' ' .1.1 g) in EtOH (25 mL) at r.t. and a mild exotherm was observed. The resulting yellowsolution was stirred for 2 days then the solvent was removed in vacuo. The residue was madebasic with a 2N NaOH solution and the aqueous layer was extracted with CH2C12 (2 X 25 mL).The combined organic layers were dried over Na2SO4 then filtered and the solvent wasremoved in vacuo to provide 4-piperidin-l-ylrnethyl-phenylamine Compound 5c as an orange-yellow oil (0.8 g, 84% yield), which was used in the next step without further purification. MSm/e 191 (M+H, 100%).; A solution of 3-(3,4-dichloro-phenyl)-acryloyl chloride Compound 5d (0.21 mmol,0.05 g) in THF (1.0 mL) was added dropwise via syringe to a solution of Compound 5c (0.21mmol, 0.04 g) and Et3N (5.1 mmol, 0.7 mL) in THF (4 mL) at 0C. The resulting suspensionwas allowed to warm to r.t. overnight, then made basic with a 2N NaOH solution and extractedwith EtOAc (25 mL). The aqueous layer was extracted with EtOAc (2 X 10 mL). The organiclayers were washed with brine, dried over Na2SO4 and then filtered. The solvent was removedin vacuo to yield 3-(3,4-dichloro-phenyl)-N-(4-piperidin-l-ylmethyl-phenyl)-acrylamideCompound 5e as a yellow solid. The product was purified by preparative TLC (10:1EtOAc:MeOH; Rf 0.4) to yield a yellow oil which was converted to the hydrochloride salt bydissolving a solution of Compound 5e in CHjCU with a solution of HC1 in Et2O, followed byremoval of the solvent (0.05 g, 60%). MS m/e 389 (M+H, 100%).; lodomethane (0.5 mL) was added to a solution of Compound Se (0.06 mmol, 0.025 g)in acetone (1.0 mL) and acetonitrile (1.0 mL) at r.t. The resulting solution was allowed to standovernight, after which a yellow precipitate was observed. The solvent was removed in vacuaand the yellow solid was washed with Et2O (2 X 1 mL) to provide Compound 53 as a yellowsolid (0.03 g, 89%). MS m/e 530 (M, 100%). |
78% | With hydrogenchloride; tin; at 70℃; for 2h; | General procedure: To a solution of 1-(chloromethyl)-4-nitrobenzene 1 (2mmol, 1 equiv.) in toluene was added slowly the corresponding dialkylamine or tert-butylamine (10mmol, 5 equiv.). The mixture was stirred under reflux for 4-5h and monitored by TLC using solvent mixture Hex/AcOEt (7:3). The reaction mixture was then cooled to room temperature, the solvent and the unreacted alkyl (dialkyl)amine was evaporated under reduced pressure to give a yellow-white solid of 1-(alkyl (dialkyl)amine-methyl)-4-nitrobenzenes 2a-e (see 1H-NMR and 13C-NMR data in supplementary data from page 8 to page 23), which was pure enough to proceed with the oxidation step. These 1-(dialkylaminemethyl)-4-nitrobenzene 2a-e (2mmol, 1 equiv.) were treated with a solution of hydrochloric acid (20mmol) and tin powder (6mmol, 3 equiv.) under reflux for 2h. The reaction mixture was then cooled to room temperature and neutralized carefully with sodium hydroxide solution (aq. 10%) and extracted with dichloromethane (3×20mL). The organic lawyer was washed with distilled water, dried using anh. MgSO4, filtered and the solvent evaporated under reduced pressure to give the aniline product, which was purified by flash chromatography column using as eluent dichloromethane: methanol (9/1) to give a yellow-orange compound 3a-e. |
75% | With hydrogen;nickel; In methanol; at 20℃; under 2250.23 Torr; for 1.41667h; | [00922] 37.0 g of 4-(piperidin-1-yl-methyl)-nitrobenzene are dissolved in 300 ml of methanol, 8.0 g of Raney nickel are added and the mixture is hydrogenated for 85 minutes with 3 bars of hydrogen at room temperature. The catalyst is filtered off and the filtrate is evaporated down. [00923] Yield: 24.0 g (75% of theory), Rf value: 0.4 (silica gel, methylene chloride/methanol=9:1) C12H18N2. [00924] ESI mass spectrum: m/z=191 [M+H+]. |
75% | With hydrogen;nickel; In methanol; at 20℃; under 2250.23 Torr; for 1.41667h; | 37.0 g of 4-(piperidin-1-yl-methyl)-nitrobenzene are dissolved in 300 ml of methanol, 8.0 g of raney nickel are added and the mixture is hydrogenated for 1 hour 25 minutes with 3 bar hydrogen at ambient temperature.. The catalyst is filtered off and the filtrate is concentrated by evaporation. Yield: 24.0 g (75% of theory), Rf value: 0.4 (silica gel, methylene chloride/methanol=9:1) C12H18N2 ESI mass spectrum: m/z=191 [M+H+] |
59% | With 5%-palladium/activated carbon; hydrogen; In methanol; at 20℃; | General procedure: To a solution of 1-(bromomethyl)-4-nitrobenzene 4 (1.0 g, 4.6 mmol) in 15 mL acetonitrile, was added a solution of piperidine in 5 mL acetonitrile at room temperature. The mixture was refluxed for 2 h and the solvent was removed under vacuum to nearly dryness. The residue was acidified with 20mL 2mol/L hydrochloric acid and extracted with ethyl acetate (10mL×3). Concentrated ammonium hydroxide was added to aqueous solution up to clearly basic, and the product was extracted with ethyl acetate (20mL×3). The combined organic layer was washed with brine, dried over anhydrous Na2SO4, and removed solvent under reduced pressure to give 5a which was used in the following reaction without further purification. A mixture of 5a (1.0 mmol) in methanol (20 mL) and 5% palladium on carbon (20 mg) was stirred under hydrogen (balloon) for 6-10 h. The mixture was then filtered through celite and then concentrated to obtain crude product, which was purified by silica gel column chromatography eluting with petroleum, ethyl acetate and triethylamine (20:20:1) to afford 6a. |
With hydrogen;palladium 10% on activated carbon; In ethyl acetate; under 2585.81 Torr; for 2h; | 10% Pd/C (300 mg) was added to a solution of Compound Ij (5.0 g, 23 mmol) in EtOAc (50 mL). The mixture was hydrogenated at 50 psi for a period of 2 hrs and filtered through Celite. The filtrate was evaporated and the residue was dissolved in 10% NH4Cl and washed with ethyl ether. The aqueous layer was then adjusted to pH 10 with NaOH and extracted with EtOAc. The combined organic layers were dried over MgSO4, then filtered, EPO <DP n="91"/>evaporated in vacuo and isolated from hexanes to provide 4-piperidin-l-ylmethyl-phenylamine Compound Ik (3.5 g) as an off-white solid. MS 191 (MH+). | |
With hydrogen;Raney Ni; In tetrahydrofuran; at 20℃; under 760.051 Torr; for 12h; | Procedure W: Intermediate 28 (1-28) - 4-(Piperidin-l-ylmethyl)benzenamine.; [00145] To a solution of 0.22 g (1.0 mmol, 1.0 eq.) of l-(4-nitrobenzyl)piperidine (I- 27) in 20 mL of THF was added ~30 mg of Raney Nickel. The reaction mixture was stirred under at room temperature under 1 atm. of hydrogen for 12 h. The reaction mixture was through Celite and the solvent removed in vacuo to provide 4- (piperidin-1 -ylmethyl)benzenamine (1-28). |
Tags: 59507-44-7 synthesis path| 59507-44-7 SDS| 59507-44-7 COA| 59507-44-7 purity| 59507-44-7 application| 59507-44-7 NMR| 59507-44-7 COA| 59507-44-7 structure
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