Extending Pummerer Reaction Chemistry. Development of a Strategy for the Regio- and Stereoselective Oxidative Cyclization of 3-(ω-Nucleophile)-Tethered Indoles
作者:Ken S. Feldman、Daniela Boneva Vidulova、Andrew G. Karatjas
DOI:10.1021/jo050896w
日期:2005.8.1
substrate, for steering nucleophilic addition to C(3) of the indole. Extension of this transformation from carboxylate nucleophiles to carbon analogues such as allylsilane, silyl enol ether, and silyl ketene iminal bearing substrates led to the formation of spirocyclic oxindole derivatives in good yields with complete regioselectivity for C(3) cyclization and with good diastereoselectivity where relevant.
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.