Irradiation-Induced Palladium-Catalyzed Decarboxylative Heck Reaction of Aliphatic <i>N</i>-(Acyloxy)phthalimides at Room Temperature
作者:Guang-Zu Wang、Rui Shang、Yao Fu
DOI:10.1021/acs.orglett.8b00023
日期:2018.2.2
It is reported that Pd(PPh3)2Cl2 in combination with 4,5-bis(diphenylphosphino)-9,9-dimethylxanthene (Xantphos) under irradiation of blue LEDs efficiently catalyzes a decarboxylative Heck reaction of vinyl arenes and vinyl heteroarenes with aliphatic N-(acyloxy)phthalimides at room temperature. A broad scope of secondary, tertiary, and quaternary carboxylates, including α-amino acid derived esters
据报道,在蓝色LED的照射下,Pd(PPh 3)2 Cl 2与4,5-双(二苯基膦基)-9,9-二甲基x吨(Xantphos)的结合可有效催化乙烯基芳烃和乙烯基杂芳烃的脱羧Heck反应。室温下的脂族N-(酰氧基)邻苯二甲酰亚胺。包括α-氨基酸衍生的酯在内的各种仲,叔和季羧酸盐都可以用作具有高立体选择性的适合的底物。实验观察是通过辐照下钯配合物激发单电子转移以活化N的激发态反应性来解释的-(酰氧基)邻苯二甲酰亚胺,并抑制不希望的β-氢化物消除烷基钯中间体。