Selective transition-metal-free vicinal cis-dihydroxylation of saturated hydrocarbons
作者:Luis Bering、Andrey P. Antonchick
DOI:10.1039/c6sc03055f
日期:——
A transition-metal-free cis-dihydroxylation of saturated hydrocarbons under ambient reaction conditions has been developed. The described approach allows a direct and selective synthesis of vicinal diols. The new reaction thereby proceeds via radical iodination and a sequence of oxidation steps. A broad scope of one-pot dual C(sp3)–H bond functionalization for the selective synthesis of vicinal syn-diols
Schaer, Helvetica Chimica Acta, 1958, vol. 41, p. 619,623
作者:Schaer
DOI:——
日期:——
Deracemization of (±)-2,3-disubstituted oxiranes via biocatalytic hydrolysis using bacterial epoxide hydrolases: kinetics of an enantioconvergent process
作者:Wolfgang Kroutil、Martin Mischitz、Kurt Faber
DOI:10.1039/a704812b
日期:——
Asymmetric biocatalytichydrolysis of (±)-2,3-disubstituted oxiranes leading to the formation of vicinal diols in up to 97% ee at 100% conversion was accomplished by using the epoxide hydrolase activity of various bacterial strains. The mechanism of this deracemization was elucidated by 18OH2-labelling experiments using a partially purified epoxide hydrolase from Nocardia EH1. The reaction was shown
Regiodivergent Reactions through Catalytic Enantioselective Silylation of Chiral Diols. Synthesis of Sapinofuranone A
作者:Jason M. Rodrigo、Yu Zhao、Amir H. Hoveyda、Marc L. Snapper
DOI:10.1021/ol2010819
日期:2011.8.5
catalyst, a regiodivergent silylation of chiral diols in cases where there is not a significant steric and electronic difference between the regioisotopic hydroxyl groups has been developed. This transformation allows for the conversion of racemic diols into regioisomeric, enantiomerically enriched, monosilylated products. The utility of this process is highlighted in the efficient enantioselective preparation
通过使用基于氨基酸的咪唑催化剂,在区域同位素羟基之间没有显着空间和电子差异的情况下,已经开发了手性二醇的区域发散硅烷化。这种转化允许将外消旋二醇转化为区域异构的、富含对映异构体的单甲硅烷基化产物。该方法的效用在有用的合成中间体和天然产物皂基呋喃酮 A 的有效对映选择性制备中得到了强调。