Nett asymmetric conjugate addition of a recyclable acetic ester enolate equivalent
作者:Timothy W. Wallace、Ian Wardell、Ke-Dong Li、S. Richard Challand
DOI:10.1039/c39910001707
日期:——
Heterodiene cycloadditions of 3-formyl chromone to ketene acetals derived from C2-symmetric 1,2-diarylethane-1,2-diols are diastereoselective; methanolysis of the cycloadducts derived from (S,S)-hydrobenzoin releases optically enriched methyl 3,4-dihydro-4-oxo-2H-1-benzopyran-2-ylacetate and the optically pure 1,2-diol.