Short and Practical Syntheses of (S)-(+)-3-(p-Tolylsulfinyl)furan-2(5H)-one and (S)-(+)-3-(p-Tolylsulfinyl)-5,6-dihydropyran-2-one
作者:Francisco Yuste、José García Ruano、David Cruz Cruz、Angélica Hernández Linares、M. Martín
DOI:10.1055/s-0028-1088008
日期:2009.4
(S)-(+)-3-(p-Tolylsulfinyl)furan-2(5H)-one and (S)-(+)-3-(p-tolylsulfinyl)-5,6-dihydropyran-2-one can be synthesized by a new and significantly improved method consisting of Knoevenagel condensation of benzyl (R)-(+)-(p-tolylsulfinyl)acetate with the tert-butyldimethylsilyl derivatives of 2-hydroxyacetaldehyde or 3-hydroxypropanal, followed by subsequent reactions of the resulting mixtures with hydrogen
(S)-(+)-3-(对甲苯磺酰基)呋喃-2(5 H)-和(S)-(+)-3-(对甲苯磺酰基)-5,6-二氢吡喃-2-一可以通过新的且显着改进的方法合成,该方法包括将苄基(R)-(+)-(对甲苯磺酸亚砜基)乙酸酯与2-羟基乙醛或3-羟基丙醛的叔丁基二甲基甲硅烷基衍生物进行Knoevenagel缩合,然后进行下列反应在碳载钯和氯化醚醚存在下,将所得混合物与氢气混合。 不对称合成-手性助剂-亚砜-α,β-不饱和内酯-丁烯内酯