(E)-ethyl 3-(2-(trifluoromethyl)imidazo[1,2-a]pyridin-7-yl)acrylate 、 1-(2-fluorobenzyl)tetrahydro-1H-thiophenium triflate 在
silica 、
乙酸乙酯 作用下,
以gave the title compound as a pale yellow oil (540 mg, 49%, 2:1 trans:cis)的产率得到(1R*,2R*,3R*)-Ethyl-2-phenyl-3-(2-(trifluoromethyl)imidazo[1,2-a]pyridin-7-yl)cyclopropanecarboxylate