Allylboration of some ketones and aldehydes with 2-allyl-1,2-oxaborolane. Isolation of their intermediate adducts and synthesis of homoallylic alcohols
作者:Weike Zhou、Shaofang Liang、Su Yu、Weiming Luo
DOI:10.1016/0022-328x(93)83165-r
日期:1993.6
reactive allylborane. This cyclic borinate ester II is a BCCO-type organoborane and can be used as a novel allylborating reagent. As is usual with allylboranes, II can also add smoothly to various ketones or aldehydes, and when followed by deboronation with diethanolamine gives the corresponding homoallylic alcohols IV. The adducts III, formed via a six-centre cyclic mechanism and allylic rearrangement, have