We have succeeded in developing direct syntheses of trans β-azidohydrins and trans 1,2-diol derivatives from olefins catalyzed by dichlorotin oxide. The regioselectivity of these reactions with tri-substituted olefins is high (10:1 in the synthesis of 1,2-diol derivatives) to excellent (>99:1 in the synthesis of azidohydrins). It has been found that these reactions do not proceed via epoxides.
Selective manganese-mediated transformations using the combination:
作者:István E Markó、Paul R. Richardson、Mark Bailey、Anita R. Maguire、Niall Coughlan
DOI:10.1016/s0040-4039(97)00309-2
日期:1997.3
A novel manganese reagent, generated from KMnO4 and Me3SiCl, in the presence of a quaternaryammonium salt, is shown to smoothly dichlorinate alkenes, open epoxides and chemoselectively oxidise sulfides to sulfoxides.
Chromyl chloride oxidations of olefins. Possible role of organometallic intermediates in the oxidations of olefins by oxo transition metal species
作者:K. Barry Sharpless、Alan Y. Teranishi、Jan E. Backvall
DOI:10.1021/ja00451a043
日期:1977.4
Direct Chlorohydrin and Acetoxy Alcohol Synthesis from Olefins Promoted by a Lewis Acid, Bis(trimethylsilyl) Peroxide and (CH<sub>3</sub>)<sub>3</sub>SiX