Extending Pummerer Reaction Chemistry. Application to the Oxidative Cyclization of Tryptophan Derivatives
作者:Ken S. Feldman、Andrew G. Karatjas
DOI:10.1021/ol048974+
日期:2004.8.1
The diastereoselective oxidative cyclization of a beta-oxygenated tryptophanderivative is reported. This process, which utilizes a new variant of the Pummerer reaction, may have application in TMC-95A synthesis.
Photoinduced Intramolecular Cyclization of <i>o</i>-Ethenylaryl Isocyanides with Organic Disulfides Mediated by Diphenyl Ditelluride
作者:Takenori Mitamura、Kimiyo Iwata、Akiya Ogawa
DOI:10.1021/jo200299d
日期:2011.5.20
Photoinduced reaction of o-ethenylaryl isocyanides with organic disulfides in the presence of diphenyl ditellurides affords the corresponding bisthiolated indole derivatives via a radical cyclization process. The cyclization can proceed at room temperature upon visible-light irradiation and exhibits good tolerance to functional groups. Several organic disulfides also can be employed for this cyclization, and the corresponding bisthiolated indole derivatives are obtained selectively. In addition, the photoinduced reaction of o-ethenylaryl isocyanides with bis(2-aminophenyl) disulfide affords tetracyclic compounds in one portion.