Nucleophilic Substitution at the Guanidine Carbon Center via Guanidine Cyclic Diimide Activation
作者:Taeyang An、Yan Lee
DOI:10.1021/acs.orglett.1c03473
日期:2021.12.3
of the guanidine carbon centers, nucleophilic reactions at these sites have been underdeveloped because of the resonance stabilization of the guanidine group. We propose a guanidine C–N bond substitution strategy entailing the formation of guanidine cyclic diimide (GCDI) structures, which effectively destabilize the resonance structure of the guanidine group. In the presence of acid additives, the guanidine
尽管胍碳中心具有缺电子性质,但由于胍基团的共振稳定性,这些位点的亲核反应尚未发展。我们提出了一种胍 C-N 键取代策略,该策略需要形成胍环二亚胺 (GCDI) 结构,从而有效地破坏胍基团的共振结构。在酸添加剂的存在下,GCDIs 的胍碳中心与各种胺和醇发生亲核取代反应。