HOFFMANN R. W.; WEIDMANN U., J. ORGANOMETAL. CHEM., 1980, 195, NO 2, 137-146
作者:HOFFMANN R. W.、 WEIDMANN U.
DOI:——
日期:——
Zur “cis-präferenz” bei der addition von butenyl-metallverbindung an ketone und aldehyde
作者:Reinhard W. Hoffman、Ulrich Weidmann
DOI:10.1016/s0022-328x(00)89998-2
日期:1980.8
Esters of 1-butenyl-3-boronic acid add to aldehydes forming 2-butenyl-1-carbinols, the E/Z-ratio of which varies between 31 and 12 depending on the steric requirements of the ester component. The steric bulk of the groups coordinating the metal ion is discussed as a potential cause of the “cis-preference” observed on addition of butenylmetal derivatives to ketones.