Anodic oxidation studies of oxygenated biphenyls. Convenient synthetic routes to certain functionalized biphenyls
作者:Richard E DeSchepper、John S Swenton
DOI:10.1016/s0040-4039(00)94963-3
日期:1985.1
The anodic oxidation of oxygenated biphenyls produces phenyl-substituted -quinol ether ketals in good-to-excellent yield. These compounds are useful substrates for preparation of more highly functionazized biphenyls.
Bio-intermediates for use in the chemical synthesis of polyketides
申请人:——
公开号:US20040018598A1
公开(公告)日:2004-01-29
The present invention relates to compounds made by a subset of modules from one or more polyketide synthase (“PKS”) genes that are used as starting material in the chemical synthesis of novel molecules, particularly naturally occurring polyketides or derivatives thereof. The biologically derived intermediates (“bio-intermediates”) generally represent particularly difficult compounds to synthesize using traditional chemical approaches due to one or more stereocenters. In one aspect of the invention, an intermediate in the synthesis of epothilone is provided that feeds into the synthetic protocol of Danishefsky and co-workers. In another aspect of the invention, intermediates in the synthesis of discodermolide are provided that feed into the synthetic protocol of Smith and co-workers. By taking advantage of the inherent stereochemical specificity of biological processes, the syntheses of key intermediates and thus the overall syntheses of compounds like epothilone and discodermolide are greatly simplified.