An unusual (4+1), instead of a normal (4+2), cycloaddition has been developed between benzocyclobutenones and styrene-type alkenes via the Rh-catalyzed C−C activation, which provides a distinct one-carbon ring expansion approach to access multi-substituted 2-indanones.
Palladium-Catalyzed Access to Benzocyclobutenone-Derived Ketonitrones via C(sp<sup>2</sup>)–H Functionalization
作者:Jakub Brześkiewicz、Rafał Loska
DOI:10.1021/acs.orglett.2c01317
日期:2022.6.10
The palladium-catalyzedC(sp2)–H functionalization of bromoaryl aldonitrones leading to benzocyclobutenone-derived ketonitrones is described. This method allows for the preparation of a wide range of strained, four-membered ketonitrones with broad functional group tolerance. Downstream transformations of the formed products were readily demonstrated, illustrating the synthetic utility of the obtained
Copper-catalyzed domino coupling reaction: an efficient method to synthesize oxindoles
作者:Jen-Chieh Hsieh、An-Yi Cheng、Jun-Hao Fu、Ting-Wei Kang
DOI:10.1039/c2ob26110c
日期:——
An efficient and novel procedure for a copper catalyzed domino coupling reaction has been developed, which afforded various oxindoles in good to excellent yields with tolerance of various substituents. In addition, this method could be applied to synthesize horsfiline and coerulescine in few steps with high total yields.
Efficient copper-catalyzed intramolecular N-arylation for the synthesis of oxindoles
作者:Yu-Huei Jhan、Ting-Wei Kang、Jen-Chieh Hsieh
DOI:10.1016/j.tetlet.2012.12.082
日期:2013.2
An efficient copper-catalyzed intramolecular N-arylation was performed by using substituted 2-(2-bromoaryl)acetamide with small amount of Cu2O and benzene-1,2-diamine as catalytic system under aerobic conditions, which provided good to excellent yields of oxindoles with tolerance of a wide variety of substrates. (C) 2012 Elsevier Ltd. All rights reserved.