Grignard / Reformatsky加成法和钛茂催化的umpolungα-氨基碳-碳键形成的组合应用为制备含氮杂季铵碳(AQC)的多功能吡咯烷酮/哌啶酮/ N -Boc-哌啶提供了灵活而通用的方案环状酰亚胺和类似物。基于这些多功能的单环基序,已经有效地构建了几个先进的带有AQC的杂环,如带有AQC的吲哚利兹定和1-azaspirocycles。
Construction of multifunctional heterocycles bearing aza-quaternary carbons by titanocene-catalyzed umpolung reactions
作者:Jiang-Tao Cheng、Xiao Zheng、Pei-Qiang Huang
DOI:10.1016/j.tet.2018.11.067
日期:2019.3
umpolung α-amino carbon-carbon bond formations provided a flexible and versatileprotocol for preparation of multifunctional pyrrolidinones/piperidinones/N-Boc-piperidines bearing aza-quaternary carbons (AQC) from cyclic imides and analogues. Based on these multifunctional single-ring motifs, several advanced AQC-bearing heterocycles, such as AQC-possessing indolizidines and 1-azaspirocycles, have been
Grignard / Reformatsky加成法和钛茂催化的umpolungα-氨基碳-碳键形成的组合应用为制备含氮杂季铵碳(AQC)的多功能吡咯烷酮/哌啶酮/ N -Boc-哌啶提供了灵活而通用的方案环状酰亚胺和类似物。基于这些多功能的单环基序,已经有效地构建了几个先进的带有AQC的杂环,如带有AQC的吲哚利兹定和1-azaspirocycles。
A Convenient Protocol for the Alkylidenation of Lactams
作者:Mark C. Elliott、Stuart V. Wordingham
DOI:10.1055/s-2006-926390
日期:——
A convenient two-step preparation of alkylidenepyrrolidines is reported.