Structure of 3034-57-9
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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. : | 3034-57-9 |
Formula : | C4H5BrN2S |
M.W : | 193.06 |
SMILES Code : | NC1=NC(=C(S1)Br)C |
MDL No. : | MFCD09260911 |
InChI Key : | XZYIDZIGJVUTKE-UHFFFAOYSA-N |
Pubchem ID : | 12954373 |
GHS Pictogram: |
![]() |
Signal Word: | Warning |
Hazard Statements: | H302-H319 |
Precautionary Statements: | P305+P351+P338 |
Num. heavy atoms | 8 |
Num. arom. heavy atoms | 5 |
Fraction Csp3 | 0.25 |
Num. rotatable bonds | 0 |
Num. H-bond acceptors | 1.0 |
Num. H-bond donors | 1.0 |
Molar Refractivity | 39.18 |
TPSA ? Topological Polar Surface Area: Calculated from |
67.15 Ų |
Log Po/w (iLOGP)? iLOGP: in-house physics-based method implemented from |
1.56 |
Log Po/w (XLOGP3)? XLOGP3: Atomistic and knowledge-based method calculated by |
2.03 |
Log Po/w (WLOGP)? WLOGP: Atomistic method implemented from |
1.8 |
Log Po/w (MLOGP)? MLOGP: Topological method implemented from |
0.67 |
Log Po/w (SILICOS-IT)? SILICOS-IT: Hybrid fragmental/topological method calculated by |
2.58 |
Consensus Log Po/w? Consensus Log Po/w: Average of all five predictions |
1.73 |
Log S (ESOL):? ESOL: Topological method implemented from |
-2.78 |
Solubility | 0.322 mg/ml ; 0.00167 mol/l |
Class? Solubility class: Log S scale |
Soluble |
Log S (Ali)? Ali: Topological method implemented from |
-3.07 |
Solubility | 0.165 mg/ml ; 0.000855 mol/l |
Class? Solubility class: Log S scale |
Soluble |
Log S (SILICOS-IT)? SILICOS-IT: Fragmental method calculated by |
-2.18 |
Solubility | 1.28 mg/ml ; 0.00664 mol/l |
Class? Solubility class: Log S scale |
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) |
No |
CYP2C19 inhibitor? Cytochrome P450 2C19 inhibitor: SVM model built on 9272 molecules (training set) |
No |
CYP2C9 inhibitor? Cytochrome P450 2C9 inhibitor: SVM model built on 5940 molecules (training set) |
No |
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 |
-6.04 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 |
2.0 |
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) |
2.43 |
* 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 |
---|---|---|
76% | With bromine; sodium hydrogencarbonate; In chloroform; water; | Step 1: Synthesis of 2-amino-5-bromo-4-methylthiazole A solution of bromine in chloroform, consisting of 66.7 ml (1.30 mol) of Br2 in 1000 ml of CHCl3, is added dropwise to a solution of 120 g (1.05 mol) of 2-amino-4-methylthiazole in 2300 ml of CHCl3, with stirring. A precipitate appears during the addition. Stirring is maintained for 48 h. The reaction medium is then filtered and the hydrobromide is washed with methylene chloride and then with pentane. The hydrobromide is dissolved in 2000 ml of water and then rendered basic by the addition of 850 ml of a 10percent aqueous solution of sodium bicarbonate. This solution is then extracted with methylene chloride. The organic phase is dried over sodium sulfate. A crystalline residue is obtained after removal of the solvent under vacuum. Brown crystals: m=155 g (crude yield: 76percent) M.p.KB =112°-113° C. 1 H NMR (delta ppm, DMSO) 2.05 (s, 3H, CH3); 7.15 (s, 2H, NH2). |
With bromine; In aq. sulfuric acid; | i) 5-Bromo-4-methyl-thiazol-2-ylamine 4-Methyl-thiazol-2-ylamine (4.00 g, 35.0 mmol) was dissolved in 17.5 mL of 20percent aq. sulfuric acid, cooled to 0° C., and treated drop wise with Br2 (1.97 mL, 1.1 eq.). After 10 Min. at 0° C. and 60 Min. at RT, the reaction mixture was carefully poured onto crashed ice/Na2CO3, twofold extracted with AcOEt, washed with water, dried over sodium sulfate, and evaporated to dryness. Thereby, 5.20 g of the title compound was isolated as light brown solid, sufficiently pure to be used for the next step. MS (ISP): 193.1, 195.1 [M+H]+. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With potassium carbonate; In N-methyl-acetamide; | 1. 2-Amino-4-methyl-5-[2-(4-phenylpiperidinyl)ethyl-thio]thiazole hydrochloride 9.65 g of <strong>[3034-57-9]2-amino-5-bromo-4-methylthiazole</strong>, 11.1 g of 2-(4-phenyl-1-piperidinyl)ethyl mercaptan and 20.7 g of potassium carbonate in 50 ml of dimethylformamide were stirred at 80° C. for 30 minutes. The mixture was poured into ice-water and extracted with methylene chloride, and the organic phase was washed with water, dried and concentrated. The residue was purified by chromatography (SiO2; CH2 Cl2, CH3 OH (0-20percent)). The hydrochloride was prepared by dissolving the free base in methanol and adding ethereal HCl. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
64% | dmap; In dichloromethane; at 20.0℃; for 20.0h; | Step 1: (5-Bromo-4-methyl-thiazol-2-yl)-carbamic acid tert-butyl ester To a solution of 6.46 g (33 mmol) of <strong>[3034-57-9]5-bromo-4-methyl-thiazol-2-ylamine</strong> (CAS [3034-57-9], Kaye and al., J. C. S. Perkin I, 2338 (1981) in 80 ml of dry dichloromethane were added 8.03 g (37 mmol) of di-tert-butyldicarbonate and 0.21 g (2.1 mmol) of 4-dimethylamino-pyridine (DMAP). The reaction was stirred for 20 h at room temperature. After standard workup and purification by flash chromatography (ethyl acetate/heptane 1:2), one obtains the title compound (6.45 g, 64percent) as a light brown solid, MS (ISP): m/e=236.9, 238.9 (M+H)+. |
With triethylamine; In dichloromethane; at 20.0℃; | A mixture of 50-1 (17.4 g, 90 mmol), Boc2O (25.7 g, 118 mmol) and Et3N (27.3 g, 270mmol) in 200 mL of DCM was stirred at room temperature overnight. The mixture was washedwith water and brine, dried with Na2SO4, filtered and concentrated to give 50-2 (23.2 g, 88percent) asa light yellow crystal. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
83% | In tetrahydrofuran; pyridine; at 20.0℃; for 3.0h; | 2-Amino-5-bromo-4-trifluoromethylthiazole (0.8 g) was dissolved in 3 ml_ of 1 :1 mixture of THF and pyridine. 2,6-difluorobenzoylchloride (0.6 g) was added at room temperature with stirring. The mixture was stirred for 3 hours at room temperature. The mixture was poured into ice water and acidified with aqueous hydrochloric acid then extracted with chloroform. The organic layer was dried over Na2SO4 and the solvent was removed under reduced pressure. Flash chromatography on silica gel gave the title compound as a white solid. Yield 83percent. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With sodium methylate; In dichloromethane; water; | i) 5-Methoxy-4-methyl-thiazol-2-ylamine 5-Bromo-4-methyl-thiazol-2-ylamine (0.5 g, 2.59 mmol) was dissolved in methanol abs. (10 mL). The solution was cooled with an ice-bath, then under stirring was added portionwise sodium methoxide (140 mg, 2.59 mmol) The black reaction mixture was stirred for 30 min. at rt then poured into a mixture of dichloromethane/water. The aqueous layer was extracted with two portions of dichloromethane. The combined, organic extracts were dried over magnesium sulfate, filtered and evaporated under reduced pressure to obtain the crude product which was used without further purification. MS (EI): m/e 144.1. | |
i) 5-Methoxy-4-methyl-thiazol-2-ylamine Sodium methoxide was freshly prepared by dissolving 0.408 g (17.7 mmol) of sodium metal in 25 mL of abs. MeOH. After cooling to 0° C., <strong>[3034-57-9]5-bromo-4-methyl-thiazol-2-ylamine</strong> (1.00 g, 5.18 mmol) was added and the cooling bath removed. After 15 Min., TLC indicated the absence of starting material. The reaction mixture was poured onto crashed ice/NH4Cl, twofold extracted with ethyl acetate, washed with water, dried over sodium sulfate, and evaporated to dryness. Flash chromatography (SiO2, hexane/ethyl acetate=1/1), yielded 0.441 g of the title compound as brown oil; it should be stored at -28° C. MS (ISP): 145.1 [M+H]+. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
i) 4-Methyl-5-methylsulfanyl-thiazol-2-ylamine 5-Bromo-4-methyl-thiazol-2-ylamine (1.35 g, 7 mmol,) was dissolved in methanol abs. (13.5mL) and sodium methanethiolate (0.6g, 7.7 mmol) 1.1 equiv.) was added portionwise at rt. After stirring overnight, the dark colored mixture was concentrated under reduced pressure and purified over a 50 g silica cartridge (NH2-modified) with ethyl acetate as eluent. The desired fractions were evaporated to give the title compound as a light yellow solid: 180 mg, MS (ISP): m/e 161.1 (M+H)+ |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With triethylamine; In acetonitrile; | ii) 2-[5-([(5-Bromo-4-methyl-1,3-thiazol-2-yl)carbamoyl]amino}sulfonyl)-3-methyl-2-thienyl]ethyl acetate Acetic acid 2-(3-methyl-5-sulfamoyl-thiophen-2-yl)-ethyl ester (0.120 g, 0.456 mmol) was dissolved in 4.5 mL of abs. acetonitrile and treated successively with phenyl chloroformate (0.057 g, 1.00 eq.) and triethylamine (0.159 mL, 2.5 eq.), and the mixture kept at ambient temperature for 1 h. 5-Bromo-4-methyl-thiazol-2-ylamine (0.088 g, 1.00 eq.), dissolved in a tiny amount of acetonitrile, was then added, and the mixture heated to 60° C. over night. Cooling, pouring onto crashed ice/NH4Cl, twofold extraction with ethyl acetate, washing with brine, drying over sodium sulfate, and evaporation of the solvents, followed by flash chromatography (SiO2, ethyl acetate/5percent MeOH), followed by crystallization from ethyl acetate/heptane, yielded finally 0.089 g of the title compound as light brown solid. MS (ISP): 479.8, 481.9 (M-H)-. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
63% | With potassium carbonate; In toluene; at 20.0℃; for 24.0h; | A mixture of <strong>[3034-57-9]5-bromo-4-methylthiazol-2-amine</strong> (7.72 g, 0.04 mol), 4-chlorobutyryl chloride (11.3 g, 0.08 mol), and potassium carbonate (5.5 g, 0.04 mol) in toluene (100 ml) was stirred at room temperature for 24 h. The toluene was then evaporated under reduced pressure. The residue was then quenched with water, stirred, and filtered. The solid obtained was washed, dried and recrystallized from chloroform to give the required product (7.5 g, 63percent yield), mp 112-4°C, m/e 297.6, 25percent (consistent with molecular formula C8H10BrClN2OS, calcd. 297.6). 1H NMR (DMSO-d6): delta 2.02-2.08 (m, 2H, J = 7.0 Hz, -CH2-CH 2-CH2-), 2.61-2.65 (m, 5H, CH 3- & -CH 2-CH2-CH2-), 3.69 (t, 2H, J= 7.0 Hz, -CH2-CH2-CH 2-), 12.42 (brs, 1H, NH).13C NMR: delta 14.7, 27.3, 32.0, 44.7, 62.9, 158.3, 159.1, 170.4. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
62% | With potassium carbonate; In N,N-dimethyl-formamide; for 14.0h;Reflux; | General procedure: A mixture of <strong>[3034-57-9]2-amino-5-bromo-4-methylthiazole</strong> (40, 1.91 g, 0.01 mole), the appropriate 2-thioxo-quinazoline analogues (9-23, 0.01 mole), anhydrous potassium carbonate (1.5 g, 0.01 mole) in DMF (10 ml) was heated under reflux for 14 hrs. Solvent was then removed under reduced pressure and continued as mentioned under compounds 25-39 (Table 1). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
54% | With potassium carbonate; In N,N-dimethyl-formamide; for 14.0h;Reflux; | General procedure: A mixture of <strong>[3034-57-9]2-amino-5-bromo-4-methylthiazole</strong> (40, 1.91 g, 0.01 mole), the appropriate 2-thioxo-quinazoline analogues (9-23, 0.01 mole), anhydrous potassium carbonate (1.5 g, 0.01 mole) in DMF (10 ml) was heated under reflux for 14 hrs. Solvent was then removed under reduced pressure and continued as mentioned under compounds 25-39 (Table 1). |
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