Potassium Carbonate → (S)-ethyl 2-tert-butoxy-2-(7-(4-chlorophenyl)-2-(2-chloropyridin-4-yl)-5-methylbenzo[d]thiazol-6-yl)acetate

Participants

Reaction Conditions

Reaction Steps

To a solution of (S)-ethyl 2-(2-bromo-7-(4-chlorophenyl)-5-methylbenzo[d]thiazol-6-yl)-2-tert-butoxyacetate (858 mg, 1.73 mmol) and 2-chloropyridine-4-boronic acid (327 mg, 2.08 mmol) in dioxane (14.6 mL) was added Pd(PPh3)4 (160 mg, 0.139 mmol) and 2N K2CO3 (3.6 mL, 7.28 mmol). The reaction was degassed for 5 minutes with N2 and then heated at 90° C. for 6 h. After cooling, the reaction mixture was diluted with EtOAc, extracted with H2O, brine, dried over Na2SO4, filtered, concentrated and purified by flash column chromatography (silica gel, 0 to 100% ethyl acetate/hexanes) to give the desired product. LCMS-ESI+ (m/z): [M+H]+ calcd for C27H27Cl2N2O3S: 529.1; found: 529.2.

Provenance & Evidence