Combination of Pd(OCOCF3)2 and (M,S,S)-iPr-SPRIX ligand promoted the intramolecular cyclization of 2-alkynoates very effectively to form α-methylene-γ-butyrolactones in good yields with up to 92% ee.
Pd(OCOCF 3)2和(M,S,S)-i Pr-
SPRIX
配体的结合非常有效地促进了2-炔酸酯的分子内环化反应,形成了产率高,产率高达92%ee的α-亚甲基-
γ-丁内酯。 。