Structure of 74537-49-8
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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. : | 74537-49-8 |
Formula : | C8H7NOS2 |
M.W : | 197.28 |
SMILES Code : | OC1=CC=C2N=C(SC)SC2=C1 |
MDL No. : | MFCD14585416 |
InChI Key : | IAQHORMPRYVLJX-UHFFFAOYSA-N |
Pubchem ID : | 45077414 |
GHS Pictogram: |
![]() |
Signal Word: | Warning |
Hazard Statements: | H302-H315-H319 |
Precautionary Statements: | P261-P305+P351+P338 |
Num. heavy atoms | 12 |
Num. arom. heavy atoms | 9 |
Fraction Csp3 | 0.12 |
Num. rotatable bonds | 1 |
Num. H-bond acceptors | 2.0 |
Num. H-bond donors | 1.0 |
Molar Refractivity | 53.36 |
TPSA ? Topological Polar Surface Area: Calculated from |
86.66 Ų |
Log Po/w (iLOGP)? iLOGP: in-house physics-based method implemented from |
1.86 |
Log Po/w (XLOGP3)? XLOGP3: Atomistic and knowledge-based method calculated by |
2.79 |
Log Po/w (WLOGP)? WLOGP: Atomistic method implemented from |
2.72 |
Log Po/w (MLOGP)? MLOGP: Topological method implemented from |
1.45 |
Log Po/w (SILICOS-IT)? SILICOS-IT: Hybrid fragmental/topological method calculated by |
3.18 |
Consensus Log Po/w? Consensus Log Po/w: Average of all five predictions |
2.4 |
Log S (ESOL):? ESOL: Topological method implemented from |
-3.31 |
Solubility | 0.0967 mg/ml ; 0.00049 mol/l |
Class? Solubility class: Log S scale |
Soluble |
Log S (Ali)? Ali: Topological method implemented from |
-4.27 |
Solubility | 0.0107 mg/ml ; 0.0000542 mol/l |
Class? Solubility class: Log S scale |
Moderately soluble |
Log S (SILICOS-IT)? SILICOS-IT: Fragmental method calculated by |
-2.9 |
Solubility | 0.25 mg/ml ; 0.00127 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 |
No |
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) |
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 |
-5.52 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 |
1.0 |
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) |
2.3 |
* 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 |
---|---|---|
92% | With triethylamine; In dichloromethane; at -10 - 0℃; for 3.0h; | Step 2. Preparation of 2-Methylsulfanyl-benzothiazol-6-ol To the ice cooled solution of 2-mercapto-benzothiazol-6-ol from step 1 (3.80 g, 20.76 mmol, 1.0 eq) in DCM (40 mL, 0.5M) at 0 C., was added triethylamine (7.29 mL, 51.91 mmol, 2.5 eq) followed by iodomethane (1.93 mL, 31.14 mmol, 1.5 eq). The reaction was stirred from 0 C. to -10 C. for 3 hours. The solvent was removed in vacuo. Water (ca. 200 mL) was added and the aqueous layer was extracted with ethyl acetate (3*150 mL). The organic layer was dried over sodium sulfate, filtered, and evaporated in vacuo to yield 2-methylsulfanyl-benzothiazol-6-ol as light green powder (3.76 g, 92%). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
62% | With caesium carbonate; In N,N-dimethyl-formamide; at 20 - 70℃;Heating / reflux; | Step 3. Preparation of 4-(2-Methylsulfanyl-benzothiazol-6-yloxy)-pyridine-2-carboxylic acid methylamide To the solution of <strong>[74537-49-8]2-methylsulfanyl-benzothiazol-6-ol</strong> (3.76 g, 19.08 mmol, 1.0 eq) in DMF (25 mL), was added CsCO3 (15.54 g, 47.70 mmol, 2.5 eq) at room temperature. After stirring for a while, 4-chloro-pyridine-2-carboxylic acid methylamide (4.86 g, 28.62 mmol, 1.5 eq) was added to the mixture and the mixture was stirred at 70 C. under reflux condenser overnight. After cooling the reaction mixture in ice bath, water (100 mL) was added and the aqueous layer was extracted with ethyl acetate (3*150 mL). The organic layer was dried over sodium sulfate, filtered, and evaporated in vacuo. The crude product was purified using 20 g of ISCO Silica Gel column (0%-50%-80%-100% ethyl acetate-hexane mixture over 45 min 40 mL/min run) to yield 4-(2-methylsulfanyl-benzothiazol-6-yloxy)-pyridine-2-carboxylic acid methylamide (3.88 g, 62%) as a white solid. M+H=332.1 |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With caesium carbonate; In 1-methyl-pyrrolidin-2-one; at 55℃; | Step 1. Preparation of 6-(2-chloropyridin-4-yloxy)-2-(methylthio)benzo[d]thiazole To the mixture of 2-(methylthio)benzo[d]thiazol-6-ol (1 g, 5.08 mmol) and cesium carbonate (4.55 g, 14 mmol) in 15 ml of NMP was added 2-chloro-4-fluoropyridine (1.32 mg, 10 mmol). The reaction mixture was stirred at 55 C. for overnight. The reaction mixture was poured into 80 ml of aq. saturated NaHCO3 and extracted with ethyl acetate (2*150 ml). The combined organic layers were washed with aq. 0.1M NaHSO4 (60 ml), water (2*60 ml) and brine (60 ml), then dried over MgSO4, filtered and evaporated in vacuo to give 6-(2-chloropyridin-4-yloxy)-2-(methylthio)benzo[d]thiazole (1.72 g) as brown oil that carried on to next step without purification. ES/MS m/z 308.9 (MH+). | |
With caesium carbonate; In 1-methyl-pyrrolidin-2-one; at 55℃; | Step 1. Preparation of 6-(2-chloropyridin-4-yloxy)-2-(methylthio)benzo[d]thiazole To the mixture of 2-(methylthio)benzo[d]thiazol-6-ol (1 g, 5.08 mmol) and cesium carbonate (4.55 g, 14 mmol) in 15 ml of NMP was added 2-chloro-4-fluoropyridine (1.32 mg, 10 mmol). The reaction mixture was stirred at 55 C. for overnight. The reaction mixture was poured into 80 ml of aq. saturated NaHCO3 and extracted with ethyl acetate (2*150 ml). The combined organic layers were washed with aq. 0.1M NaHSO4 (60 ml), water (2*60 ml) and brine (60 ml), then dried over MgSO4, filtered and evaporated in vacuo to give 6-(2-chloropyridin-4-yloxy)-2-(methylthio)benzo[d]thiazole (1.72 g) as brown oil that carried on to next step without purification. ES/MS m/z 308.9 (MH+). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
62% | With caesium carbonate; In N,N-dimethyl-formamide; at 75℃; for 6.0h; | Step 1. Synthesis of tert-butyl 4-(2-(methylthio)benzo[d]thiazol-6-yloxy)picolinate To a solution of 2-(methylthio)benzo[d]thiazol-6-ol (5.0 g, 25.38 mmol, 1.0 eq) in 25 mL of N,N-dimethylformamide was added tert-butyl 4-chloropicolinate (8.13 g, 38.07 mmol, 1.5 eq) and cesium carbonate (20.67 g, 63.45 mmol, 2.5 eq). The reaction mixture was stirred at 75 C. for 6 hours. After the mixture was cooled to room temperature, the mixture was added 120 mL of water and aqueous phase extracted with ethyl acetate (3*150 mL), combined organic layers were dried over sodium sulfate. After filtration, the solid was purified by silica gel column eluted with ethyl acetate-hexane 0%-50% mixture to give 5.84 g of the titled compound as brown powder (62%). MH+=375. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
48% | With N-chloro-succinimide; In N-methyl-2-pyrrolidine; at 20℃; for 1.0h; | Step 1. Synthesis of 7-chloro-2-(methylthio)benzo[d]thiazol-6-ol To the solution of 2-(methylthio)benzo[d]thiazol-6-ol (500 mg, 2.53 mmol, 1.0 eq) in 10 mL of NMP was added N-chlorosuccinimide (507 mg, 3.80 mmol, 1.5 eq) at room temperature. The reaction mixture was stirred at room temperature for 1 hour thereafter the mixture was diluted with saturated sodium bicarbonate solution (ca. 100 mL) and aqueous layer extracted with DCM (ca. 150 mL*3). Combined organic layers were dried over sodium sulfate, filtered and condensed under reduced pressure. Purification on ISCO using gradient 0%-100% ethyl acetate-hexane gave 283.39 mg of product in 48% yields structure of which was confirmed by H+NMR. LC/MS (m/z) [232.0] (MH+) |
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