Synthetic Access to α-Oxoketene Aminals by the Nucleophilic Addition of Enol Silane-Derived Palladium(II) Enolates to Carbodiimides
作者:Subba Rao Polimera、Andivelu Ilangovan、Nicholas A. Meanwell、Murugaiah A. M. Subbaiah
DOI:10.1021/acs.joc.2c02107
日期:2022.11.4
Synthetically important α-oxoketene aminal intermediates can now be accessed from readily available and inexpensive carbodiimides as starting materials via the nucleophilic addition of palladium enolates derived from enol silane precursors. This operationally simple method features mild reaction conditions, including open air atmosphere, ligand-free metal catalysis, broad substrate scope, and multi-gram
现在可以通过亲核加成衍生自烯醇硅烷前体的钯烯醇化物,从现成且廉价的碳二亚胺作为起始材料,获得合成上重要的 α-氧代烯胺中间体。这种操作简单的方法具有温和的反应条件,包括露天气氛、无配体金属催化、广泛的底物范围和多克可扩展性。展示了利用 α-氧代烯胺的烯胺特性并涉及对亲电系统进行 C-亲核加成的选择合成应用,包括 α,β-不饱和酯、偶氮二羧酸酯、芳烷基卤化物和醛。