D-Lactic Acid → HCID 178462364, compound

Participants

Reaction Steps

To a mixture of 3-{trans-4-[(6-aminothieno[3,2-b]pyridin-7-yl)amino]cyclohexyl}propanenitrile (0.048 g, 0.16 mmol) and (R)-2-hydroxypropanoic acid (0.019 g, 0.21 mmol) in methylene chloride (0.96 mL) was added N,N-diisopropylethylamine (60 μL, 0.35 mmol) and N,N,N′,N′-tetramethyl-O-(7-azabenzotriazol-1-yl)uronium hexafluorophosphate (66 mg, 0.17 mmol). The resulting mixture was stirred at room temperature overnight. The mixture was washed with water. The organic layers were concentrated and purified on silica gel (eluting with 0 to 10% MeOH in dichloromethane) to give (2R)—N-(7-{[trans-4-(2-Cyanoethyl)cyclohexyl]amino}thieno[3,2-b]pyridin-6-yl)-2-hydroxypropanamide. LCMS calculated for C19H25N4O2S (M+H)+: m/z=373.2. Found: 373.0. A solution of the amide intermediate in acetic acid (0.3 mL) was stirred at 105° C. for 5 h. The solvent in the reaction mixture was removed in vacuo, diluted with MeOH and purified on RP-HPLC (XBridge C18 column, eluting with a gradient of acetonitrile/water containing 0.1% ammonium hydroxide, at flow rate of 30 mL/min) to give the desired product (6 mg, 10%). LCMS calculated for C19H23N4OS (M+H)+: m/z=355.2. Found: 355.1.

Provenance & Evidence