Asymmetric Synthesis of β-Hydroxyketones, Precursors of Chiral 1,3-Diols, from β, δ-Diketosulfoxides.
摘要:
(R) beta, delta-diketosulfoxides were reduced with DIBAL to (S2R(S)) delta-keto beta-hydroxysulfoxides (de > 98%) which can be easily transformed into syn or anti chiral 1,3-diols by known procedures.
Synthesis of optically active β,γ-diketo- p-tolylsulfoxides.
摘要:
chiral beta,gamma-diketo-p-tolysulfoxides were prepared in high yields by three different methods: 1,3-diketone dianions on menthyl (-)(S) p-tolysulfinate, methyl (+)(R) p-tolysulfoxide anion on beta-ketoester and finally (+)(R) p-tolysulfinyl 2-propanone dianion on carboxylic ester.