Allylation of Erythromycin Derivatives: Introduction of Allyl Substituents into Highly Hindered Alcohols
作者:Eric J. Stoner、Matthew J. Peterson、Michael S. Allen、John A. DeMattei、Anthony R. Haight、M. Robert Leanna、Subhash R. Patel、Daniel J. Plata、Ramiya H. Premchandran、Michael Rasmussen
DOI:10.1021/jo034883z
日期:2003.11.1
Functionalized erythromycin 9-oxime derivatives are 6-O-allylated under mild conditions using substituted allyl tert-butyl carbonates under palladium(0) catalysis. This allylation works well where traditional ether-forming protocols function poorly. Allyl tert-butyl carbonates provide higher yields in this reaction than lesser substituted carbonates such as ethyl or isopropyl. Aryl-substituted allyl carbonates or carbamates may be employed as well and, when used, produce trans-olefinic products.