Chiral Homoenolate Equivalents, V. Hydroxylakylation of Lithiated 3‐[(
<i>S</i>
)‐2‐(Methoxymethyl)pyrrolidino]‐1,3‐diphenylpropene – An Asymmetric Homoaldol Reaction
作者:Hubertus Ahlbrecht、Andreas Kramer
DOI:10.1002/cber.19961291004
日期:1996.10
hydroxyalkylation of lithiated 3-[(S)-2-(methoxymethyl)-pyrrolidino]-1,3-diphenylpropene (2) with aldehydes is completely regioselective giving homoaldol adducts in good yields. The simple diastereoselectivity is low with typical ratios ranging between 1:1 and 1:3 with the syn isomer predominating. The induced diastereoselectivity is much higher and is strongly solvent-dependent. The reaction predominantly