快速访问杂环自行车:开发了一种新型的阳离子金(I)催化的串联异双环化和1,2-烷基迁移,可从简单的方法快速,高效且立体选择性地访问高度取代的呋喃[3,4- c ]氮杂环庚烷,在温和条件下容易获得的2-(1-炔基)-2-烯键-1-酮和α,β-不饱和亚胺(参见方案)。相反,当使用杂芳基亚胺时,仅形成直接的正式的[4 + 3]环加合物。
Insertion of Nitriles into Zirconocene 1-aza-1,3-diene Complexes: Chemoselective Synthesis of N-H and N-Substituted Pyrroles
作者:Shasha Yu、Meijun Xiong、Xin Xie、Yuanhong Liu
DOI:10.1002/anie.201407221
日期:2014.10.20
insertion of nitriles into zirconocene‐1‐aza‐1,3‐diene complexes provides an efficient, chemoselective, and controllable synthesis of N‐H and N‐substitutedpyrroles upon acidic aqueous work‐up. The outcome of the reaction (that is, the formation of N‐H or N‐substitutedpyrroles) results from the different cyclization patterns, which depend on the relative stability and reactivity of the enamine–imine