Stereochemical Studies. XXV. The Absolute Configuration and Optical Purity of (+)-4-Methyl-4-phenyl-2-cyclohexenone
作者:GENJI OTANI、SHUNICHI YAMADA
DOI:10.1248/cpb.21.2119
日期:——
(+)-4-Methyl-4-phenyl-2-cyclohexenone ((+)-I), obtained by asymmetric synthesis, was chemically correlated to (S)-(+)-2-methyl-2-phenylbutanoic acid, whose absolute configuration is known. It was shown that (+)-4-methyl-4-phenyl-2-cyclohexenone ((+)-I) has (R) configuration. In determining the configuration, the optical ratation of optically pure (+)-4-methyl-4-phenyl-2-cyclohexenone ((+)-I) was estimated to be +130°in ethanol at D ray.
(通过不对称合成获得了(+)-4-甲基-4-苯基-2-环己烯酮((+)-I),并将其与已知绝对构型的(S)-(+)-2-甲基-2-苯基丁酸进行了化学关联。结果表明,(+)-4-甲基-4-苯基-2-环己烯酮((+)-I)具有 (R) 构型。在确定构型时,估计光学纯的(+)-4-甲基-4-苯基-2-环己烯酮((+)-I)在乙醇中 D 射线处的光学比值为 +130°。