The omega-alkynals yielded macrocyclic (S)-allylic alcohols in a one-pot reaction sequence involving alkyne monohydroboration, boron to zinc transmetalation, and ((+)-DAIB)-catalyzed enantioselective intramolecular ring closure to the aldehyde function. A general study of this macrocyclization methodology is presented with respect to ligand type, size, and nature of the formed rings.
ω-
炔烃在一锅反应序列中生成大环(S)-烯丙基醇,涉及
炔烃单氢
硼化,
硼到
锌的
金属转移和((+)-
DAIB)催化的对醛官能团的对映选择性分子内闭环。有关
配体类型,大小和形成环的性质,对这种大环化方法进行了一般研究。