ethyl 8-(iodomethyl)-6-methyl-2-(trifluoromethyl)-2H-chromene-3-carboxylate 、
sodium thiomethoxide 在
ice 作用下,
以
甲醇 为溶剂,
反应 4.0h,
以to give a yellow oil (0.16 g, 98%)的产率得到ethyl 6-methyl-8-[(methylthio)methyl]-2-(trifluoromethyl)-2H-chromene-3-carboxylate