Extending Pummerer reaction chemistry. Application to the oxidative cyclization of tryptophan derivatives. Journal   Organic letters. Citation   Org Lett. 6(17):2849-52 Publication date   2004 Aug 19 Authors   Feldman KS Karatjas AG Grant agencies   National Institute of General Medical Sciences Grants   NIGMS GM35727 Abstract   The diastereoselective oxidative cyclization of a beta-oxygenated tryptophan derivative is reported. This process, which utilizes a new variant of the Pummerer reaction, may have application in TMC-95A synthesis.