The Use of Nafion®-H To Promote Epoxide Cyclizations
作者:Stephen K. Taylor、Michael G. Dickinson、Scott A. May、Dacia A. Pickering、Paul C. Sadek
DOI:10.1055/s-1998-4495
日期:1998.8
A study of epoxyolefin cyclizations catalyzed by bismuth trifluoromethanesulfonate and other metal triflates
作者:Joshua R. Lacey、Peter W. Anzalone、Christopher M. Duncan、Matthew J. Hackert、Ram S. Mohan
DOI:10.1016/j.tetlet.2005.10.013
日期:2005.12
Epoxyolefin cyclizations have attracted considerable interest due to their importance in biosynthetic pathways. Bismuth trifluoromethanesulfonate as well as several other metal triflates are shown to be highly effective (0.1 mol %) catalysts for the cyclization of geraniolene oxide. The product composition is found to be more dependent on solvent and substrate concentration than on the nature of the metal triflate. Cyclization products are favored in CH2Cl2 and under high dilution conditions. Ether solvents favored acyclic products. (c) 2005 Elsevier Ltd. All rights reserved.
Highly stereoselective Friedel-Crafts alkylations via epoxide transannular reactions
作者:Stephen K. Taylor、Gay L. Lilley、Kevin J. Lilley、Patricia A. McCoy
DOI:10.1021/jo00326a021
日期:1981.6
Demonstration of a Common Concerted Mechanistic Pathway for the Acid-Catalyzed Cyclization of 5,6-Unsaturated Oxiranes in Chemical and Enzymatic Systems