A Photocatalyzed Synthesis of Naphthalenes by Using Aniline as a Traceless Directing Group in [4 + 2] Annulation of Amino-benzocyclobutenes with Alkynes
作者:Qile Wang、Nan Zheng
DOI:10.1021/acscatal.7b00716
日期:2017.6.2
We report a visible-light-promoted synthesis of substituted naphthalenes via [4 + 2] annulation of amino-benzocyclobutenes with alkynes. Amino-benzocyclobutenes, which are conveniently synthesized by [2 + 2] cycloaddition of arynes with ketenes followed by reductive amination, undergo regioselective opening of the cyclobutenyl ring to reveal a presumably distonic radical cation upon photooxidation
An Efficient Synthesis of Polysubstituted Naphthalene Derivatives by Gold-Catalyzed Cyclization of 1-Arylalka-2,3-dienyl Acetates
作者:Wangqing Kong、Chunling Fu、Shengming Ma
DOI:10.1002/ejoc.201001112
日期:2010.12
An efficient synthetic strategy to generate differently polysubstituted naphthalenes and iodonaphthalenes through a gold-catalyzed cyclization reaction of 1-arylalka-2,3-dienyl acetates was described. Due to the substituent loading capability of both the aromatic ring and the allene moiety, different substituents may be introduced to the different locations of the naphthalenes. A possible mechanism
Palladacycles showed their high efficiency in the kinetic resolution of 1-hydroxy-2-aryl-1,2-dihydronaphthalenes via dehydration, providing optically active products in high yields and high ee with an S factor up to 26. The superiority of a benzylic-substituted palladacycle in asymmetric induction was also demonstrated.