Intramolecular cyclization reactions of carbonyl derivatives of hydroxysulfones
作者:Chunyang Jin、Hollie K. Jacobs、Francisco Cervantes-Lee、Aravamudan S. Gopalan
DOI:10.1016/s0040-4020(02)00338-1
日期:2002.5
prepared from the corresponding hydroxysulfones by phase-transferalkylation reactions. The sulfonyl carbanions of 2a–e are readily generated upon treatment with LHMDS in THF at −78°C and undergo intramolecular acylation reactions to give a variety of functionalized cyclic ethers 4a–e in good yields. The intramolecular aldol-type reaction of the sulfonyl carbanion of 6a is useful for the preparation of six-membered