One-Pot Method for Stereoselective Cyclopropanation of Electron-Deficient Olefins with Methyl Bromoacetate and Phenacyl Bromide in the Presence of Triphenylarsine
作者:Zhongjiao Ren、Weiguo Cao、Weiyu Ding、Yu Wang
DOI:10.1055/s-2005-916035
日期:——
triphenylarsine-catalyzed one-pot procedure for the preparation of cis-cyclopropanes with acyclic electron-deficient olefins with carbonyl-stabilized arsonium ylides formed from methyl bromoacetate or phenacyl bromide in the presence of NaHCO 3 has been achieved. This method is simple, high-yielding and cis-selective. The success of this method depends on the choice of base solvent and temperature.
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 novel synthesis of cyclopropyl lactam and amide from<i>cis</i>-2-aryl-3-benzoyl-1,1-dicynocyclopropane with H<sub>2</sub>O<sub>2</sub>in the presence of NaHCO<sub>3</sub>
作者:Zhongjiao Ren、Jie Chen、Yeying Lu、Danyi Wu、Weiguo Cao
DOI:10.1002/jhet.5570440503
日期:2007.9
The process for preparation of cyclopropyllactam and amide from cis-2-aryl-3-benzoyl-1,1-dicynocyclopropane with H2O2 in the Presence of NaHCO3 is described. The highly stereoselective conversion of monocyano group to amide has been carried out in the present method.
描述了在NaHCO 3存在下由顺式-2-芳基-3-苯甲酰基-1,1-二壬基环丙烷与H 2 O 2制备环丙基内酰胺和酰胺的方法。在本方法中已经进行了单氰基向酰胺的高度立体选择性的转化。
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.]