Palladium complex of 2-(phosphinoaryl)pyridine 1b, which is an effective catalyst for asymmetric allylic alkylation (denoted as AAA) of acyclic alkenyl carboxylate, was also found to be a highly effective catalyst for AAA of cyclic alkenyl carboxylate: high enantioselectivities of 87% ee and 94% ee were achieved in the reactions of 2-cyclohexenyl and 2-cycloheptenyl pivalates, respectively.
研究发现,2-(膦酰基)
吡啶 1b 的
钯配合物是无环烯基
羧酸酯不对称烯丙基烷基化(简称 AAA)的有效催化剂,也是环烯基
羧酸酯 AAA 的高效催化剂:在 2-
环己烯基和 2-
环庚烯基新
戊酸酯的反应中,对映体选择性分别高达 87% ee 和 94%ee。