Diastereoselective Additions of Chiral Vinylzinc Reagents to α-Chiral Aldehydes
作者:James A. Marshall、Patrick Eidam
DOI:10.1021/ol0363568
日期:2004.2.1
[reaction: see text] Additions of vinylic zinc bromide reagents to alpha-chiral aldehydes (R(1) = CH(2)OTBS, R(2) = Me; R(1) = Me, R(2) = OTBS) in the presence of lithiated (+)- or (-)-N-methylephedrine proceed with predominant reagent control to afford anti or syn adducts stereoselectively, except when the aldehydes possess an alkoxy substituent at the alpha- or beta-positions (R(1) = Me, R(2) = OBn;