Regioselectivity in the claisen rearrangement of -allylic alcohols: Electronic and steric effects of C-4 substituents
作者:Kathlyn A. Parker、James G. Farmar
DOI:10.1016/s0040-4039(00)89215-1
日期:1985.1
Enol ethers of 1,4-dien-3-ols in which one allylic double bond is substituted with a methoxyl or alkyl group at C-4 undergo Claisen rearrangement in which the unsubstituted olefin participates preferentially. Rearrangement to the substituted olefin has been shown to be retarded by both electronic and steric effects.
其中一个烯丙基双键在C-4处被甲氧基或烷基取代的1,4-二烯-3-醇的烯醇醚发生克莱森重排,未取代的烯烃优先参与其中。已显示出电子和空间位阻都阻碍了对取代烯烃的重排。