tert-butyl 4-(1-hydroxy-2-(triphenyl-l5-phosphaneylidene)ethylidene)-2,2-dimethyl-3,5-dioxopyrrolidine-1-carboxylate 、 trimethoxonium tetrafluoroborate 以
二氯甲烷 为溶剂,
反应 24.0h,
以30%的产率得到N-tert-butoxycarbonyl-4-methoxy-5,5-dimethyl-3-[2-(triphenylphosphoranylidene)acetyl]-3-pyrrolin-2-one