Regioselectivity in the Formation of Small- and Medium-Sized Cyclic Ethers by Diene-Ene Ring-Closing Metathesis
作者:Sudipta Basu、Herbert Waldmann
DOI:10.1021/jo052367y
日期:2006.5.1
In the formation of medium-sized ethers by diene-ene ring-closing metathesis, the formation of cyclic allyl ethers with a smaller ring size and of pentadienyl ethers with a larger ring size compete with each other. In the competition between six- and eight-membered and seven- and nine-membered ring formation, the smaller rings are formed exclusively, whereas in the competition between the five- and
在通过二烯-烯闭环复分解形成中等尺寸的醚中,具有较小环尺寸的环状烯丙基醚和具有较大环尺寸的戊二烯基醚的形成相互竞争。在六元和八元环与七元和九元环形成的竞争中,较小的环仅形成,而在五元和七元环之间的竞争中,两种产物的形成量相当。