反应详情

温度

50 °C

A mixture of ethyl [2-({7-[methyl(2-thienylsulfonyl)amino]-1H-indol-2-yl}carbonyl)hydrazino](oxo)acetate (0.43 g), Lawesson's reagent (0.42 g) and tetrahydrofuran (10 mL) was stirred at 50° C. overnight. The reaction mixture was concentrated, and the residue was subjected to silica gel column chromatography, and the title compound (0.29 g, yield 68%) was obtained as colorless crystals from a fraction eluted with ethyl acetate-hexane (2:3, volume ratio). The crystals were recrystallized from ethyl acetate-hexane. melting point 176-177° C.

1. concentrationThe reaction mixture was concentrated