(+)-Neomenthanethiol (1b) with (c = 1.85, CHCl3), is prepared from (-)-menthol (2a) in three steps in 42% overall yield. 1H- and 31P-NMR studies showed that the diastereomeric and optical purity of the product obtained is at least 95%. Methylation of (+)-1b leads to (+)-methyl neomenthyl sulfide (11) which undergoes oxidation to the corresponding sulfoxide (+)-13 (a mixture of diastereomers in a 69:31 ratio) and sulfone (+)-12.
(+)-新薄荷醇硫醇 (1b) 是由
(-)-薄荷醇 (2a) 经过三步反应制备而成,整体产率为42% (c = 1.85,
CHCl3)。1H-和 31P-NMR研究表明,所获得产品的立体异构体及光学纯度至少为95%。(+)-1b的甲基化反应生成(+)-甲基
新薄荷基
硫化物 (11),该产物随后被氧化为相应的亚砜 (+)-13(立体异构体的混合物,比例为69:31)和砜 (+)-12。