Ring-Closing Metathesis with Vicinal Dibromoalkenes as Protected Alkynes: A Synthetic Approach to Macrocyclic Enynes
作者:Sedef Karabiyikoglu、Robert G. Iafe、Craig A. Merlic
DOI:10.1021/acs.orglett.5b02595
日期:2015.11.6
A newstrategy to access macrocyclic enynes was developed. To block undesired ene–yne cyclization pathways, alkynes were protected via bromination and the resultant acyclic vic-(E)-dibromotrienes participated in selective ene–ene ring closing metathesis reactions. Zinc-promoted deprotection of (E)-dibromodienes provided macrocyclic enynes in high yields.