Catalytic Asymmetric Synthesis of Macrocyclic (<i>E</i>)-Allylic Alcohols from ω-Alkynals via Intramolecular 1-Alkenylzinc/Aldehyde Additions
作者:Wolfgang Oppolzer、Rumen N. Radinov、Emad El-Sayed
DOI:10.1021/jo000463n
日期:2001.7.1
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。