Palladium(II)-Catalyzed Aerobic Intermolecular Cyclization of Acrylic Acid with Alkenes to α-Methylene-γ-butyrolactones
作者:Koji Yonehara、Yasuyuki Miyoshi、Aki Tsukajima、Takeo Akatsuka、Makoto Saito
DOI:10.1002/adsc.201100006
日期:2011.5.9
this article is a palladium(II)/copper(II)‐ or palladium(II)‐catalyzed intermolecular cyclization of acrylic acid with alkenes to produce α‐methylene‐γ‐butyrolactone derivatives using molecular oxygen as an environmentally benign oxidant. In this system, the carboxylato, especially trifluoroacetato, or trimethylacetato ligand, plays a quite important role to afford a high catalytic activity by suppressing
本文中的方法是钯(II)/铜(II)-或钯(II)与烯烃的丙烯酸分子间环化反应,利用分子氧作为环境友好的氧化剂生产α-亚甲基-γ-丁内酯衍生物。在此系统中,羧基,尤其是三氟乙酰基或三甲基乙酰基配体,在抑制钯(0)黑色沉积方面发挥着非常重要的作用,以提供高催化活性。