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.
3- 甲酰基铬酮与来自 C2 对称的 1,2-二叔丁烷-1,2-二醇的酮乙醛的异二烯环加成反应具有非对映选择性;来自 (S,S)-hydrobenzoin 的环加成产物的甲醇分解释放出光学富集的 3,4-二氢-4-氧代-2H-1-苯并吡喃-2-基乙酸甲酯和光学纯的 1,2-二醇。