Stereoselective Synthesis of <i>cis</i>‐1‐Aryl‐2‐benzoyl‐3,3‐dicyanocyclopropanes in the Presence of KF·2H<sub>2</sub>O
作者:Zhongjiao Ren、Weiguo Cao、Weiyu Ding、Yu Wang、Lilin Wang
DOI:10.1081/scc-200032500
日期:2004.1.1
Abstract KF · 2H2O was found to be a highly efficient base for synthesis of cis‐1,2‐cyclopropanes with arsonium salt and olefins. The advantages of the process are mild reaction condition, easy workup, excellent yields, and high stereoselectivity.
Abstract The highly stereoselective preparation of cis‐1‐aryl‐2‐benzoyl‐3,3‐dicyanocyclopropanes with arsonium salt and olefin in water is described. It is simple, efficient, and environmentally benign.
A new stereoselective approach for the synthesis of substituted 3-cyclopropylmethylene-1,3-dihydro-indol-2-one via the condensation reaction of cis-1-aryl-2-benzoyl-3,3-dicyanocyclopropanes with oxindole in water
作者:Dong Zhou、Haigang Yu、Ying Liu、Jie Chen、Hongmei Deng、Min Shao、Zhongjiao Ren、Weiguo Cao
DOI:10.1016/j.tetlet.2010.08.025
日期:2010.10
A new stereoselective approach for the synthesis of substituted 3-cyclopropylmethylene-1,3-dihydroindol-2-one via the condensation reaction of cis-1-aryl-2-benzoyl-3,3-dicyanocyclopropanes with oxindole in water was achieved. (C) 2010 Elsevier Ltd. All rights reserved.
Highly Stereoselective Cyclopropanation of Olefins Catalyzed by a Novel<i>C</i><sub>3</sub>-Symmetric Arsine
作者:Changqing Wang、Yanping Yi、Daoan Xiao、Rong Zhou、Hui Liang、Guangquan Mei
DOI:10.1080/00397911.2013.817018
日期:2014.2.16
A novel C-3-symmetric arsine was employed in the one-pot cyclopropanation of olefins with carbonyl-stabilized arsonium ylides formed in situ from phenacyl bromide in the presence of NaHCO3. This new arsine demonstrates good stereoselectivity and activity in the one-pot cyclopropanation of arylidenemalononitrile. [Supplementary materials are available for this article. Go to the publisher's online edition of Synthetic Communications (R) for the following free supplemental resource(s): Full experimental and spectral details.]
Novel Procedure for Highly Stereoselective Synthesis of Bicyclic Cyclopropane‐lactam with <i>cis</i>‐2‐Aryl‐1‐benzoyl‐3,3‐dicyanocyclopropane and 2‐Cyanomethyl‐1,3‐benzothiazole in Water