Origin of Diastereocontrol in the Oxy-Michael Reactions of δ-Lactol Anions: A Computational and Experimental Study
作者:Robert D. Richardson、Felix A. Hernandez-Juan、John W. Ward、Darren J. Dixon
DOI:10.1002/chem.200801368
日期:2008.10.29
energy refinements. The resulting proposed model for the origins of stereocontrol in this reaction has been tested by experiment. The reactions lead to a high cis diastereoselectivity across the THP ring due to the preference for both the alkoxide and the 6-substituent to sit equatorial in the alkylation transition structure. In the oxy-Michael addition of these lactolates to beta-substituted nitroolefins