Metalated Nitriles: Chelation-Controlled Cyclizations to <i>cis</i> and <i>trans</i> Hydrindanes and Decalins
作者:Fraser F. Fleming、Viet Anh Vu、Brian C. Shook、Moshfiqur Rahman、Omar W. Steward
DOI:10.1021/jo062270r
日期:2007.2.1
stereocontrol in alkylations of metalated nitriles. Doubly deprotonating a series of cyclic β-hydroxynitriles triggers cyclizations that implicate metalated nitrile intermediates having configurations imposed by chelation with an adjacent, chiral lithium alkoxide. Identifying chelation as a general stereocontrol element explains several previously anomalous alkylations of metalated nitriles and provides