A General Protocol toward Oxindoles Bearing C3‐Allylic Quaternary Stereocenter via Domino Reaction: A Concise Synthesis of Heterocycle‐Fused Indoline Alkaloids
efficiently catalytic method toward the synthesis of indolin-2-ones featuring an allylic derived C3-quaternary stereocenter via an intramolecular Heck cyclization/Suzuki coupling of N-substituted-N-(2-bromophenyl)acrylamides and organoboron reagents was successfully developed by using a 1,3-bis(2,6-diisopropylphenyl)acenaphthoimidazol-2-ylidene (AnIPr)-ligated oxazoline palladacycle. It enabled a very broad
Ni-Catalyzed Enantioselective Reductive Diarylation of Activated Alkenes by Domino Cyclization/Cross-Coupling
作者:Kuai Wang、Zhengtian Ding、Zhijun Zhou、Wangqing Kong
DOI:10.1021/jacs.8b08190
日期:2018.10.3
A Ni-catalyzed enantioselective reductive diarylation of activated alkenes by domino cyclizative/ cross-coupling of two aryl bromides is developed. This reaction proceeds under very mild conditions and shows broad substrate scope, without requiring the use of preformed organometallic reagents. Moreover, this approach provides direct access to various bis-heterocycles bearing all-carbon quaternary centers in synthetically useful yields (up to 81%) with excellent enantioselectivity (>30 examples, 90-99% ee).
Copper(I)-Catalyzed Aryl or Vinyl Addition to Electron-Deficient Alkenes Cascaded by Cationic Cyclization
作者:Bing Zhou、Wei Hou、Yaxi Yang、Huijin Feng、Yuanchao Li
DOI:10.1021/ol500033w
日期:2014.3.7
An exoselective copper-catalyzed arylation and vinylation-carbocyclization of electron-deficient alkenes was developed to provide rapid and efficient access to a variety of functionalized 3,3-disubstituted oxindoles. With this method, a highly efficient and concise formal synthesis of (+/-)-physostigmine and (+/-)-physovenine has been completed.
Copper-Catalyzed Diarylation of Activated Alkenes with Diaryliodonium Salts
Cu(OTf)(2)-catalyzed diarylation of activated alkenes by using diaryliodonium(III) salts has been developed. With this method, arylated oxindoles can be easily accessed in good yields. Insights into the mechanism of copper-catalyzed arylations are discussed, and the findings are expected to help increase the level of understanding of catalytic arylations with diaryliodonium salts.
Synthesis of 3,3-Disubstituted Oxindoles by Visible-Light-Mediated Radical Reactions of Aryl Diazonium Salts with N-Arylacrylamides
作者:Weijun Fu、Fengjuan Xu、Yuqin Fu、Mei Zhu、Jiaqi Yu、Chen Xu、Dapeng Zou
DOI:10.1021/jo401894b
日期:2013.12.6
A mild and efficient visible-light-mediated diarylation of N-arylacrylamides with aryl diazonium salts under mild conditions has been developed. This method provides convenient access to a variety of useful 3,3-disubstituted oxindoles by constructing two C-C bonds in one step.