反应详情

A solution of 5-bromo-2-methylamino-nicotinic acid ethyl ester (100 mg, 0.39 mmol), lithium chloride (98 mg, 2.32 mmol), copper(I)chloride (191 mg, 1.93 mmol), vinyl tributyl tin (151 mg, 0.46 mmol), and tetrakis(triphenylphosphine)palladium(0) (45 mg, 39 μmol) in methyl sulfoxide (3.1 mL) was stirred at 65° C., then after 4 h another portion of vinyl tributyl tin (141 mg, 0.46 mmol) was added, and stirring was continued for 18 h. After cooling, the reaction mixture was partitioned between sat. aq. ammonium chloride solution and diethyl ether, the organic layer was washed with water, dried (MgSO4), and evaporated. Chromatography (SiO2, heptane-ethyl acetate gradient) afforded the title compound (72 mg, 91%). Yellow liquid, MS (ISP): 207.1 (M+H)+.

1. temperatureAfter cooling
2. customthe reaction mixture was partitioned between sat. aq. ammonium chloride solution and diethyl ether
3. washthe organic layer was washed with water
4. dry with materialdried (MgSO4)
5. customevaporated