Asymmetric oxidation of silyl enol ethers using chiral dioxiranes derived from α-fluoro cyclohexanones
作者:A. Solladié-Cavallo、P. Lupattelli、L. Jierry、P. Bovicelli、F. Angeli、R. Antonioletti、A. Klein
DOI:10.1016/s0040-4039(03)01388-1
日期:2003.8
Asymmetric oxidation of silyl enolethers derived from tetralone, 2-methyl-tetralone, propiophenone and deoxybenzoin using chiral dioxiranes generated in situ from oxone and new chiral α-fluorinated cyclohexanones or fructose-derived ketone have been studied. It was observed that tetrasubstituted silyl enolethers are poor substrates, that substitution at C8 of the fluoro-ketones has a significant effect
研究了使用原位生成的手性二恶英酮和新的手性α-氟代环己酮或果糖衍生的酮,对四氢萘酮,2-甲基-四氢萘酮,苯乙酮和脱氧安息香衍生的甲硅烷基烯醇醚进行不对称氧化。观察到四取代的甲硅烷基烯醇醚是差的底物,氟代酮在C8处的取代对所获得的对映选择性具有显着影响,并且果糖衍生的酮提供了更高的对映选择性。可以使用提议用于烯烃环氧化的螺环模型合理化获得的主要羟基酮的绝对构型。