[(1R,4S)-4-(trifluoromethylsulfonyloxymethyl)cyclobut-2-en-1-yl]methyl trifluoromethanesulfonate 生成 [triphenyl-[[(1R,4S)-4-[[triphenyl(trifluoromethylsulfonyloxy)-λ5-phosphanyl]methyl]cyclobut-2-en-1-yl]methyl]-λ5-phosphanyl] trifluoromethanesulfonate