Phosphate → Methyl 2-(tri-n-butylstannyl)imidazo[5,1-b]thiazole-7-carboxylate

Participants

Reaction Conditions

Reaction Steps

A solution (5 ml) of 0.716 g of tri-n-butylstannyl chloride in THF was added to a solution (20 ml) of 0.364 g of methyl imidazo[5,1-b]thiazole-7-carboxylate in THF at −70° C. A 1.0 N lithiumbis(trimethylsilyl)amide/n-hexane solution (4.4 ml) was added dropwise thereto at −70° C. The mixture was stirred at −50° C. for 30 min. The reaction solution was added to an ice cold mixed solution composed of 50 ml of 0.2 N phosphate buffer (pH 7) and 50 ml of dichloromethane with stirring. The organic layer was separated, and then dried over anhydrous magnesium sulfate. The solvent was removed by distillation. The residue was subjected to separation and purification by flash column chromatography on silica gel (hexane:ethyl acetate=1:1) to give 0.395 g of the title compound.

Provenance & Evidence