produced from the corresponding sulfide via the same catalystic system although less efficiently. (S)-(+)α-Methoxyphenylacetic acid was used as a chiral NMR shift reagent to determine the optical purity and absolute configuration of these quasisymmetrical dialkyl sulfoxides. (S)-S-Benzyl-8-mercaptooctanoic acid methyl ester S-oxide was obtained by Δ 9 -desaturase-mediated sulfoxidation in 40-50% isolated
我们已经表明酿酒酵母的 Δ 9 -去饱和酶可以充当区域和对映选择性充氧剂。氧合的立体
化学与去饱和过程中的除氢相匹配。因此,通过将相应的
硫化物与酿酒酵母 A
TCC 12341 温育获得的 9-
硫硬脂酸甲酯 S-氧化物(>96% ee)显示具有 R 构型。(R)-10-
硫硬脂酸甲酯 S-氧化物 (91% ee) 由相应的
硫化物通过相同的催化剂体系制备,尽管效率较低。(S)-(+)α-
甲氧基苯乙酸用作手性 NMR 位移试剂,以确定这些准对称二烷基亚砜的光学纯度和绝对构型。