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
One-pot synthesis of diverse<i>N</i>,<i>N</i>′-disubstituted guanidines from<i>N</i>-chlorophthalimide, isocyanides and amines<i>via N</i>-phthaloyl-guanidines
作者:András Demjén、Anikó Angyal、János Wölfling、László G. Puskás、Iván Kanizsai
DOI:10.1039/c7ob03109b
日期:——
A sequential one-pot approach towards N,N′-disubstituted guanidines from N-chlorophthalimide, isocyanides and amines is reported. This strategy provides straightforward and efficient access to diverse guanidines in yields up to 81% through previously unprecedented N-phthaloylguanidines. This protocol also features wide substrate scope and mild conditions.