Iridium-Catalyzed Asymmetric Ring-Opening Reactions of Oxabenzonorbornadienes with Amine Nucleophiles
作者:Dingqiao Yang、Yuhua Long、Junfang Zhang、Heping Zeng、Sanyong Wang、Chunrong Li
DOI:10.1021/om100384q
日期:2010.8.23
We have explored a new iridium-catalyzed ring-openingreaction of oxabenzonorbornadienes with a variety of primary aromatic amine or N-substituted piperazine nucleophiles, affording the corresponding products in excellent yields (up to 99%) with moderate enantioselectivity (25−81% ee). The trans configuration of product 2d was confirmed by X-ray crystallography.
Iridium-catalyzed highly enantioselective ring opening reaction of oxabenzonorbornadienes with amines
作者:Yongyun Zhou、Zhiwu Lu、Baiqiu Han、Chaoyuan Zeng、Zhenhua Zhang、Baomin Fan
DOI:10.1016/j.tetasy.2015.10.017
日期:2015.12
The complex of [Ir(COD)Cl](2) and (R)-xylyl-phanephos was used as an effective catalyst for the asymmetric ring opening reaction of oxabenzonorbomadienes with various amines. Under the optimized reaction conditions, high enantioselectivities with moderate to good yields could be obtained from a wild scope of oxabenzonorbornadienes and amines. (C) 2015 Elsevier Ltd. All rights reserved.
Asymmetric ring opening reaction of oxabenzonorbornadienes with amines promoted by iridium/NMDPP complex
As an efficient catalyst, the [Ir(COD)CI](2)/NMDPP complex has been successfully applied to promote the asymmetric ring opening reaction of oxabenzonorbornadienes with various amines, which afforded the corresponding products in good yields (72-98%) with good enantioselectivities (80-90% ee). (C) 2014 Published by Elsevier Ltd.