Structure of 146533-41-7
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The BI-3802 was designed by Boehringer Ingelheim and could be obtained free of charge through the Boehringer Ingelheim open innovation portal opnMe.com, associated with its negative control.
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| CAS No. : | 146533-41-7 |
| Formula : | C10H5BrCl2N2 |
| M.W : | 303.97 |
| SMILES Code : | ClC1=C(C2=CC=C(Br)C=C2)C(Cl)=NC=N1 |
| MDL No. : | MFCD13151897 |
| InChI Key : | WEEFLZORZXLIJE-UHFFFAOYSA-N |
| Pubchem ID : | 19735262 |
| GHS Pictogram: |
|
| Signal Word: | Warning |
| Hazard Statements: | H302-H315-H319-H335 |
| Precautionary Statements: | P261-P305+P351+P338 |
| Num. heavy atoms | 15 |
| Num. arom. heavy atoms | 12 |
| Fraction Csp3 | 0.0 |
| Num. rotatable bonds | 1 |
| Num. H-bond acceptors | 2.0 |
| Num. H-bond donors | 0.0 |
| Molar Refractivity | 65.19 |
| TPSA ? Topological Polar Surface Area: Calculated from |
25.78 Ų |
| Log Po/w (iLOGP)? iLOGP: in-house physics-based method implemented from |
2.64 |
| Log Po/w (XLOGP3)? XLOGP3: Atomistic and knowledge-based method calculated by |
4.44 |
| Log Po/w (WLOGP)? WLOGP: Atomistic method implemented from |
4.21 |
| Log Po/w (MLOGP)? MLOGP: Topological method implemented from |
3.1 |
| Log Po/w (SILICOS-IT)? SILICOS-IT: Hybrid fragmental/topological method calculated by |
4.38 |
| Consensus Log Po/w? Consensus Log Po/w: Average of all five predictions |
3.75 |
| Log S (ESOL):? ESOL: Topological method implemented from |
-5.05 |
| Solubility | 0.00272 mg/ml ; 0.00000896 mol/l |
| Class? Solubility class: Log S scale |
Moderately soluble |
| Log S (Ali)? Ali: Topological method implemented from |
-4.7 |
| Solubility | 0.00607 mg/ml ; 0.00002 mol/l |
| Class? Solubility class: Log S scale |
Moderately soluble |
| Log S (SILICOS-IT)? SILICOS-IT: Fragmental method calculated by |
-6.24 |
| Solubility | 0.000175 mg/ml ; 0.000000574 mol/l |
| Class? Solubility class: Log S scale |
Poorly soluble |
| GI absorption? Gatrointestinal absorption: according to the white of the BOILED-Egg |
High |
| BBB permeant? BBB permeation: according to the yolk of the BOILED-Egg |
Yes |
| P-gp substrate? P-glycoprotein substrate: SVM model built on 1033 molecules (training set) |
No |
| CYP1A2 inhibitor? Cytochrome P450 1A2 inhibitor: SVM model built on 9145 molecules (training set) |
Yes |
| CYP2C19 inhibitor? Cytochrome P450 2C19 inhibitor: SVM model built on 9272 molecules (training set) |
Yes |
| CYP2C9 inhibitor? Cytochrome P450 2C9 inhibitor: SVM model built on 5940 molecules (training set) |
Yes |
| CYP2D6 inhibitor? Cytochrome P450 2D6 inhibitor: SVM model built on 3664 molecules (training set) |
No |
| CYP3A4 inhibitor? Cytochrome P450 3A4 inhibitor: SVM model built on 7518 molecules (training set) |
No |
| Log Kp (skin permeation)? Skin permeation: QSPR model implemented from |
-5.0 cm/s |
| Lipinski? Lipinski (Pfizer) filter: implemented from |
0.0 |
| Ghose? Ghose filter: implemented from |
None |
| Veber? Veber (GSK) filter: implemented from |
0.0 |
| Egan? Egan (Pharmacia) filter: implemented from |
0.0 |
| Muegge? Muegge (Bayer) filter: implemented from |
0.0 |
| Bioavailability Score? Abbott Bioavailability Score: Probability of F > 10% in rat |
0.55 |
| PAINS? Pan Assay Interference Structures: implemented from |
0.0 alert |
| Brenk? Structural Alert: implemented from |
0.0 alert: heavy_metal |
| Leadlikeness? Leadlikeness: implemented from |
No; 1 violation:MW<1.0 |
| Synthetic accessibility? Synthetic accessibility score: from 1 (very easy) to 10 (very difficult) |
1.96 |
* 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 |
|---|---|---|
| 86% | With trichlorophosphate; In water; N,N-dimethyl-aniline; toluene; at 30 - 100℃; for 5h; | 200 g of the intermediate 3 obtained in the third step was taken in a 3 L three-necked flask.Add 300g of toluene and 180g of N,N-dimethylaniline, mechanically stirred,230 g of phosphorus oxychloride was added dropwise at 30 C, and the temperature was raised to 55 C after the addition.After the solid is completely dissolved, the temperature is raised to 100 C, the reaction is carried out for 4 h, and then cooled to 25 C for use.450 g of water was mixed with 500 g of toluene, and cooled to 25 C with stirring.The above-mentioned alternate reaction solution was added, and the process control temperature was 30 C.Stir at 30 C for 1 h, then stand for stratification, and extract the aqueous phase with toluene several times.The toluene extract and the organic phase are combined, and the combined organic phases are decomposed under reduced pressure.Further, ethanol was added, and the mixture was stirred at 15 C for 1.5 hours, suction filtered, and dried.The product 5-(4-bromophenyl)-4,6-dichloropyrimidine 195.6 g, the yield was 86.0%,The liquid chromatographic test results of the obtained product are shown in Figure 2.HPLC purity is 99.93%,The test results came to the Waters 2489-1525 high performance liquid chromatograph produced by Waters. |
| 79% | With trichlorophosphate; at 90℃; | A stirred solution of 100 g 5-(4-bromophenyl)pyrimidine-4,6-diol (11, 0.374 mol) was added to 300 cm3 phosphorousoxy chloride. The reaction mass was heated to 90 Cand maintained until completion (monitored by HPLC).After completion of the reaction, the reaction mass wascooled to 10-15 C and quenched over water below 15 C.The obtained solid was filtered and washed with water until the pH of the filtrate became 6.5-7.0. The material was dried under reduced pressure at 65 C to obtain the crudesolid. The crude solid was further recrystallized in methanol and the obtained solid was filtered and dried toprovide 2. Yield: 90 g (79%); purity by HPLC: 99.7%;m.p.: 100-103 C. The spectral data of compound 2 werefound to agree with the reported data [8]. |
| With N,N-dimethyl-aniline; trichlorophosphate; at 130℃; for 2h; | To a suspension of 5- (4-BROMOPHENYL)-PYRIMIDINE-4, 6-DIOL (9.90 G) in POCI3 (130 ml) was carefully added N, N-dimethylaniline (13.5 ML). The mixture was heated to 130C for 2 h. The dark brown solution was evaporated and the residue was poured into ice/water. The suspension was diluted with 2 N HCI and water and stirred for 20 min. The precipitate was collected and washed with water. The solid material was dissolved in EA, washed with 1 N aq. HCI and brine. The organic phase was dried over MGS04 and evaporated. The material was further purified by column chromatography on silica gel eluting with hexane: EA 95: 5 to 1: 1 followed by CRYSTALLISATION from hexane/EA AT-20C to give 4, 6-DICHLORO-5- (4- bromophenyl)-pyrimidine (8.3 g) as pale YELLOW CRYSTALS.'H-NMR (D6-DMSO) : 7.39-7. 44 (m, 2H), 7.72-7. 76 (m, 2H), 8.94 (s, 1 H). |
| With N,N-dimethyl-aniline; trichlorophosphate; at 130℃; for 2h; | To a suspension of 5-(4-bromophenyl)-pyrimidine-4,6-diol (9.9O g) in POCl3 (13O mL) was carefully added JV,lambda/-dimethylaniline (13.5 mL). The mixture is heated to 1300C for 2 h. The dark brown solution is concentrated in vacuo and the residue was poured into ice/water. The suspension is diluted with 2 N HCl and water and stirred for 20 min. The precipitate that formed is collected and washed with water. The solid material is dissolved in EA, washed with 1 N aq. HCl and brine. The org. phase is dried over MgSO4 and evaporated. The material is further purified by column chromatography on silica gel eluting with Hex:EA 95:5 to 1 :1 followed by crystallisation from Hex/EA at -200C to give 4,6-dichloro-5-(4-bromophenyl)-pyrimidine as pale yellow crystals (8.3 g). 1H-NMR(D6-DMSO): delta 7.39-7.44 (m, 2H), 1.12-1.16 (m, 2H), 8.94 (s, IH). | |
| With N,N-dimethyl-aniline; trichlorophosphate; at 130℃; for 2h; | d) To a suspension of 5-(4-bromophenyl)-pyrimidine-4,6-diol (9.90 g) in POCI3 (130 ml_) is carefully added N, N-dimethylaniline (13.5 ml_). The mixture is heated to 1300C for 2 h. The dark brown solution is evaporated and the residue is poured into ice/water. The suspension is diluted with 2 N HCI and water and stirred for 20 min. The precipitate is collected and washed with water. The solid material is dissolved in EA, washed with 1 N aq. HCI and brine. The organic phase is dried over MgSO4 and evaporated. The material is further purified by column chromatography on silica gel eluting with hexane:EA 95:5 to 1 :1 followed by crystallisation from hexane/EA at -200C to give 4,6-dichloro-5-(4-bromophenyl)- pyrimidine (8.3 g) as pale yellow crystals. 1H-NMR(D6-DMSO): 7.39-7.44(m, 2H)1 7.72-7.76(m, 2H), 8.94(s, 1 H). | |
| To a suspension of 5-(4-bromophenyl)-pyrimidine-4,6-diol (9.90 g) in POCl3 (130 mL) was carefully added N,N-dimethylaniline (13.5 mL). The mixture is heated to 130 C. for 2 h. The dark brown solution is concentrated in vacuo and the residue was poured into ice/water. The suspension is diluted with 2 N HCl and water and stirred for 20 min. The precipitate that formed is collected and washed with water. The solid material is dissolved in EA, washed with 1 N aq. HCl and brine. The org. phase is dried over MgSO4 and evaporated. The material is further purified by column chromatography on silica gel eluting with Hex:EA 95:5 to 1:1 followed by crystallisation from Hex/EA at -20 C. to give 4,6-dichloro-5-(4-bromophenyl)-pyrimidine as pale yellow crystals (8.3 g).1H-NMR(D6-DMSO): delta 7.39-7.44 (m, 2H), 7.72-7.76 (m, 2H), 8.94 (s, 1H).LC-MS: tR=1.02 min. | ||
| 100 g | With triethylamine; trichlorophosphate; In acetonitrile; at 25 - 85℃; for 5h;Inert atmosphere; | Triethyl amine (130 mL) was added to a mixture of 5-(4-bromophenyl)-pyrimidine-4,6-diol (100 g), phosphoryl chloride (400 mL) and acetonitrile (600 mL) at 25-35C under nitrogen atmosphere for a period of 60 mins. The reaction mass was heated to 80-85C and stirred for 4 hrs. The reaction mass was distilled off under vacuum at below 75C followed by stripped off with acetonitrile. The reaction mass was cooled to 10-15C, water (500 mL) was added and stirred for 30 mins. Aqueous hydrochloric acid (2N, 500 ml) was added to the reaction mass at 10-15C and stirred for 30 mins. The solid obtained was filtered, washed with water and dried under vacuum at 40-45C for 6 hrs to get the title compound. Yield: 100 g; purity by HPLC: 99.0% |
| With N,N-dimethyl-aniline; trichlorophosphate; at 70℃; for 4h; | Add 5-(4-bromophenyl)-4,6-dihydroxypyrimidine to a washed, dry round bottom flask.70 parts of phosphorus oxychloride (new steam),Then, 1 part of N,N-dimethylaniline was added dropwise thereto.Slowly turn on the magnetic stirrer and stir at room temperature for 15 minutes.Warmed to 70 C in 1 h,The reaction was carried out at this temperature for 3 h.After the reaction was terminated, it was naturally cooled to 55 C, and excess phosphorus oxychloride was distilled off under reduced pressure.Add the remaining mixture to the ice water, the temperature is controlled below 10 C, the natural yellow solid will be precipitated, and the pH of the solution will be adjusted.To be weakly acidic, it was washed twice with ice water and then with dichloroethane three times. After drying the wet product, a pale yellow product can be obtained (5-(4-Bromophenyl)-4,6-dichloropyrimidine). |

| Yield | Reaction Conditions | Operation in experiment |
|---|---|---|
| In DMF (N,N-dimethyl-formamide); at 20℃; for 24h; | A solution of 4, 6-DICHLORO-5- (4-BROMOPHENYL)-PYRIMIDINE 1.79 mg) and 2- methoxyethanesulfamic acid amide potassium salt (4.54 g, Example 1) in DMF (25 ml) was stirred at rt for 24 h before bulk of the solvent was removed in vacuo. The residue was treated with 10% aq. citric acid. The suspension was filtered, and the mother liquor was extracted twice with EA. The organic phase was evaporated and combined with the solid material collected earlier. The crude product was purified by column chromatography on silica gel eluting with DCM containing 4% of methanol to give 2-METHOXYETHANESULFAMIC acid [6-CHLORO-5- (4-BROMOPHENYL)- pyrimidin-4-yl]-amide (640 mg) as a beige foam. LC-MS2 : TR = 4.46 min, [M+1] + = 422.93, [M-1]-= 420.82. |
| Yield | Reaction Conditions | Operation in experiment |
|---|---|---|
| With trichlorophosphate; | In analogy to Example 3, paragraph b), from 5-(p-bromophenyl)-4,6(1H,5H)-pyrimidinedione and POCl3, there was prepared 5-(p-bromophenyl)-4,6-dichloropyrimidine, melting point 99-100 C. (from hexane), and therefrom with p-chlorophenylsulfonamide, there was prepared N-[5-(p-bromophenyl)-6-chloro-4-pyrimidinyl]-p-chlorobenzenesulfonamide, melting point 266-268 C. (from CH3 CN). |
| Yield | Reaction Conditions | Operation in experiment |
|---|---|---|
| In dimethyl sulfoxide; at 20℃; for 18h; | f) A solution of <strong>[146533-41-7]4,6-dichloro-5-(4-bromophenyl)-pyrimidine</strong> (405 mg, 1.33 mmol) and 3-benzyloxypropylsulfamide potassium (752 mg, 2.66 mmol) in DMSO is stirred at rt under argon for 18 h. The clear solution is poured onto 10% aq. citric acid solution (50 mL) and extracted twice with EA (2x75 mL). The organic extracts are washed with water (50 mL) and the solvent is evaporated. The residue is purified by column chromatography on silica gel eluting with hexane/EA 3:2 to afford 1-benzyloxypropanesulfamic acid [6-chloro-5-(4-bromophenyl)-pyrimidin-4- yl]-amide (524 mg) as a colourless foam. LC-MS: tR = 1.05 min, [M+H]+ = 510.96; 1H NMR (CDCI3): delta 8.44 (s, 1H), 7.71-7.65 (m, 2H), 7.40-7.28 (m, 5H), 7.18-7.12 (m, 2H), 6.90 (s, 1H), 6.05 (t, J = 5.9 Hz, 1 H), 4.49 (s, 2H), 3.57 (t, J 0 5.9 Hz, 2H), 3.18 (q, J = 5.9 Hz, 2H), 1.88 (p, J = 5.9 Hz, 2H). |
| Yield | Reaction Conditions | Operation in experiment |
|---|---|---|
| In dimethyl sulfoxide; at 20℃; for 24h; | A solution of 5-(4-bromophenyl)-4,6-dichloro-pyrimidine (4.0O g, 13.2 mmol) and benzylsulfamide potassium salt (7.38 g, 32.9 mmol) in DMSO (30 mL) was stirred at rt for 24 h before being diluted with a 10% aq. citric acid solution (200 mL). The suspension that formed was filtered. The collected solid was washed well with water and dried under HV at 400C for 48 h to give the expected product as a white powder (6.15 g). 1H NMR (CDCl3): delta 4.23 (d, J = 5.9 Hz, 2H); 5.94 (t br., J = 6 Hz, IH); 7.05 (d, J = 8.2 Hz, 2H); 7.20-7.35 (m, 5H); 7.68 (d, J = 8.2 Hz, 2H); 8.61 (s, IH). LC-MS: tR = 1.02 min, [M+H]+ = 452.95. |
| Yield | Reaction Conditions | Operation in experiment |
|---|---|---|
| A solution of 5-(4-bromophenyl)-4,6-dichloro-pyrimidine (4.00 g, 13.2 mmol) and benzylsulfamide potassium salt (7.38 g, 32.9 mmol) in DMSO (30 mL) was stirred at it for 24 h before being diluted with a 10% aq. citric acid solution (200 mL). The suspension that formed was filtered. The collected solid was washed well with water and dried under HV at 40 C. for 48 h to give the expected product as a white powder (6.15 g).1H NMR (CDCl3): delta 4.23 (d, J=5.9 Hz, 2H); 5.94 (t br., J=6 Hz, 1H); 7.05 (d, J=8.2 Hz, 2H); 7.20-7.35 (m, 5H); 7.68 (d, J=8.2 Hz, 2H); 8.61 (s, 1H).LC-MS: tR=1.02 min, [M+H]+=452.95. |
| Yield | Reaction Conditions | Operation in experiment |
|---|---|---|
| 110 g | With sodium amide; In dimethyl sulfoxide; at 25 - 30℃; for 10h;Inert atmosphere; | To a solution of 5-(4-bromophenyl)-4,6-dichloro-pyrimidine (100 g) in dimethyl sulfoxide (700 ml), potassium(N-propylsulfamoyl)amide (145 g) was added at 25-30C under nitrogen atmosphere and stirred for 10 hrs. After reaction completion, pH of the reaction mass was adjusted to 2-3 using aqueous hydrochloric acid at 25-30C and stirred for 75 mins. The solid obtained was filtered, washed with water and suck dried under vacuum. Methanol (3500 ml) was added to the above compound and heated to reflux temperature then stirred for an hour at reflux. The reaction mass was distilled upto 450-550 mL remained in the flask. The reaction mass was cooled to 25-30C, stirred for 75 mins then further cooled to 0- 5C and stirred for 75 mins. The obtained solid was filtered, washed with methanol and dried under vacuum at 50-55C for 4 hrs to get the title compound. Yield: 110 g; Purity by HPLC: 99.10% |
| Yield | Reaction Conditions | Operation in experiment |
|---|---|---|
| 89% | A.ii. N-(5-(4-bromophenyl)-6-chloropyrimidin-4-yl)propane-1-sulfamide:tBuOK (16.0 g; 0.14 mol; 1 eq.) was added to the above prepared cold (5C) solution of Intermediate A.i in DMSO. The resulting suspension was heated to 20C and stirred for 30 mi <strong>[146533-41-7]5-(4-bromophenyl)-4,6-dichloropyrimidine</strong> (10.7 g; 0.035 mol; 0.25 eq.) was added portionwise and the mixture was heated to 50C for 1 h. Water was added. The pH of the solution was adjusted to 4-5 using 33% aq. HC1. The suspension was cooled to 0C and stirred for 30 mm. It was filtered off, rinsed with a solution of water and MeOH and dried under reduced pressure to yield the title compound as a white solid (12.6 g, 89% yield with respect to S -(4-bromophenyl)-4,6-dichloropyrimidine). | |
| 89% | A.ii. N- (5 -(4-bromopheny I) -6-chloropyrimidin-4-yl)propane- 1-sulfamide; tBuOK (16.0 g; 0.14 mol; 1 eq.) was added to the above prepared cold (5C) solution of Intermediate A.i in DMSO. The resulting suspension was heated to 20C and stirred for 30 min. <strong>[146533-41-7]5-(4-bromophenyl)-4,6-dichloropyrimidine</strong> (10.7 g; 0.035 mol; 0.25 eq.) was added portion wise and the mixture was heated to 50C for 1 h. Water was added. The pH of the solution was adjusted to 4-5 using 33% aq. HCl. The suspension was cooled to 0C and stirred for 30 min. It was filtered off, rinsed with a solution of water and MeOH and dried under reduced pressure to yield the title compound as a white solid (12.6 g, 89% yield with respect to <strong>[146533-41-7]5-(4-bromophenyl)-4,6-dichloropyrimidine</strong>). | |
| With lithium amide; In dimethyl sulfoxide; at 15 - 25℃; for 2h;Inert atmosphere; | To a solution of V-propylsulfamide (25.0 gm, 0.180 mol) in dimethylsulfoxide (250.0 ml) was added Lithium amide (7.6 gm, 0.33 mol) under nitrogen atmosphere at 15-25 C, followed by addition of 5-(4-bromophenyl)-4,6- dichloropyrimidine (50.0 gm, 0.164 mol). The reaction mass was stirred for 2 hr. at room temperature and the progress of reaction was monitored by HPLC. After reaction completion this reaction mass was drop wise added to the solution containing Lithium amide (7.6 gm, 0.33 mol) and ethylene glycol (250.0 ml) at 15-25 C under nitrogen atmosphere. After the addition reaction mixture was heated to 105 - 110C, maintained for 18-24 hours and the reaction progress was monitored by HPLC. After completion of reaction, resulting mass was cooled to 25-30 C and 5% w/v citric acid solution (1000.0 ml) was added to the reaction mass. The product was extracted twice with ethyl acetate (1000.0 ml x 2), further organic layer was washed twice with 10% w/v brine solution (500.0 ml x 2). Organic layer was concentrated at 55-60C under reduced pressure to produce A/-5-(4- bromophenyl)-6-(-2-hydroxyethoxy)-4-pyrimidinyl-//-propylsulfamide as a residue. The obtained residue was dissolved in methanol 65-70 C and maintained for 30 min. The resulting solution was gradually cooled to room temperature then cooled to 0-5C and maintained reaction mass at 0-5C for 60-90 min. Obtained solid was filtered, washed with methanol (50.0 ml), suck dried and dried at 55-60C to afford white solid of N-5-(4-bromophenyl)-6-(- 2hydroxyethoxy)-4-pyrimidinyl- N'-propylsulfamide. [Yield = 50.0 gm (70.48 %); Purity (HPLC) = 98.50 %]. (M + H)7z= 433.0. 1H NMR (CDCl3): delta 8.46-8.45 (s, 1 H), 7.65-7.62 (m, 2H), 7.25-7.17 (m, 2H), 6.91 (s, br, 1 H), 5.62-5.69 (t, 1 H), 4.48-4.46 (m, 2H), 3.84- 3.81 (m, 2H), 2.97-2.92 (q, 2H), 2.97-2.92 (t, 1 H), 1.16-1.52 (h, 2H), 0.94- 0.91 (t, 3H). 3C NMR (CDC ): delta 11.31 , 22.07, 44.74, 59.20, 68.32, 104.94, 121.42, 129.84, 131.55, 132.79, 155.91 , 156.38, 166.26. |
| Potassium tert-butoxide(90 gm, 0.802 mol) was added in to a reaction flask containing a solution of N-Propyl-sulfamide (N-Propyl-sulfamide (82 gm, 0.593 mol) in DMSO (250 ml)) and stirred the reaction mass at room temperature for 30 min to obtain potassium salt of N- propyl sulfamide. <strong>[146533-41-7]5-(4-bromophenyl)-4,6-dichloropyrimidine</strong> (100 gm, 0.329 mol) was added in to the reaction mass and stirred the contents for 5-6 hrs at 25-30C. DM water (500 ml) was added to the reaction mass a stirred solution. Further 10% citric acid solution (500 ml) was added slowly for an about 1 -2 hrs to obtain solid. The precipitated solid was filtered and washed with DM water (120 ml) and suck dried the material for 30 min. The product was dried under vacuum at 50-55 C for 10-12 hrs to obtain title product. Yield: 137 gm; Purity (By HPLC): 92.0% | ||
| With lithium amide; In dimethyl sulfoxide; at 20 - 25℃; for 2h; | To a stirred solution of 2.0 kg 5-(4-Bromophenyl)-4,6-dichloropyrimidine (2, 6.57 mol) in 20 dm3 DMSO,0.303 kg lithium amide (13.15 mol) and 1.0 kg N-propylsulfamide(3, 7.23 mol) were added at 20-25 C. The reaction mass was stirred at 20-25 C for 2-6 h (completionof the reaction was monitored by HPLC). |

[ 146533-41-7 ]
[ 146533-41-7 ]
[ 1246922-88-2 ]
| Yield | Reaction Conditions | Operation in experiment |
|---|---|---|
| 85% | With potassium tert-butylate; In toluene; at 10 - 25℃; for 1.5h; | <strong>[146533-41-7]5-(4-bromophenyl)-4,6-dichloropyrimidine</strong> (26.7 g; 88.0 mmol) and (0279) 2-((5-bromopyrimidin-2-yl)oxy)ethanol (20 g; 91.3 mmol; 1.04 eq.; prepared as described in Kokatla and Lakshman, Org. Lett. (2010), 12, 4478-4481) were suspended in toluene (266 mL). KOtBu (1 1.3 g, 101 mmol, 1.15 eq.) was added portionwise at 10-20C. The resulting mixture (white suspension to orange mixture) was stirred at 20-25C. After 1.5 h, 40% aq. citric acid (100 mL) was added until pH is around 2-3. The layers were separated. The org. phase was washed 3 times with water (100 mL) and concentrated to dryness to give crude title compound as an orange oil (46 g). MeOH (65 mL) was added and a yellow precipitate was formed. More MeOH (160 mL) was added and the resulting suspension was slurried under reflux for 30 min. It was cooled to 20-25C. It was filtered off, rinsed with MeOH and dried under vacuum to yield the title compound as a white powder (36.3 g; 85% yield). (0280) XH-NMR (CDC13) delta: 8.54 (s, 1H); 8.50 (s, 2H); 7.55-7.51 (m, 2H); 7.22-7.18 (m, 2H); 4.78-4.74 (m, 2H); 4.66-4.64 (m, 2H). (0281) [M+l]+ = 485 and 487. (0282) LC-MS (method 1): tR = 1.97 min; 96.5% a/a |
[ 146533-41-7 ]
[ 107-21-1 ]
[ 146533-41-7 ]
| Yield | Reaction Conditions | Operation in experiment |
|---|---|---|
| 74.78% | With ammonium hydroxide; In tetrahydrofuran; at 25 - 30℃; | To a stirred solution of <strong>[146533-41-7]5-(4-bromophenyl)-4,6-dichloropyrimidine</strong>(2, 50.0 g, 0.164 mol) in 250 cm3 THF, 500 cm3 ammonium hydroxide was added at 25-30 C and the resulting mass was maintained for 24-30 h (completion ofthe reaction was monitored by HPLC). After ensuring the completion of the reaction, the resulting reaction mass was extracted with dichloromethane (250 cm3 9 2). The dichloromethane layer was washed with 250 cm3 10% brine solution and concentrated under reduced pressure toobtain the residue. The residue was suspended in 100 cm3n-heptane and the resulting suspension was heated at 45-50 C for 30 min. The reaction mass was cooled to 25-30 C and maintained for 60 min. The obtained solid was filtered, washed with 25 cm3 n-heptane, suck dried, anddried at 40-45 C for 2 h to offer 12. Yield: 35.0 g(74.78%); purity by HPLC: 99.75%; m.p.: 198-200 C; 1HNMR (300 MHz, DMSO-d6): d = 8.22 (s, 1H), 7.70-7.67(d, J = 8.1 Hz, 2H), 7.28-7.25 (d, J = 8.1 Hz, 2H), 6.67(br s, NH2) ppm; 13C NMR (DMSO-d6): d = 162.73,157.05, 156.48, 132.18, 132.03, 122.00, 114.20 ppm; IR(KBr): m = 3467, 3293, 3166, 1651, 1569, 994 cm-1; MS(70 eV): m/z = 286 [M+]. |

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