Studies toward Gymnodimine: Development of a Single-Pot Hua Reaction for the Synthesis of Highly Hindered Cyclic Imines
作者:Yong Ahn、Gabriela I. Cardenas、Ju Yang、Daniel Romo
DOI:10.1021/ol0155081
日期:2001.3.1
variation of the Hua cyclic imine synthesis has been developed. The reaction involves generation of N-trimethylsilyl lactams in situ followed by alkyllithium addition leading directly to cyclic imines. Importantly, this reaction proceeds efficiently with highly hindered alpha,alpha-dialkyl lactams, provided 1,2-dimethoxyethane (DME) is used as solvent, leading to stable cyclic imines. Overall, this transformation
[结构:见文字]。在针对裸子草胺和相关海洋毒素的研究中,开发了Hua环亚胺合成的单锅法。该反应涉及原位产生N-三甲基甲硅烷基内酰胺,然后直接加入烷基锂,产生环状亚胺。重要的是,如果使用1,2-二甲氧基乙烷(DME)作为溶剂,则该反应可以在高度受阻的α,α-二烷基内酰胺中有效地进行,从而得到稳定的环状亚胺。总的来说,这种转变允许烷基碘与内酰胺的一锅耦合以产生环状亚胺。