.alpha.-Hydroxy ketones in high enantiomeric purity from asymmetric dihydroxylation of enol ethers
摘要:
Highly enantioselective construction of alpha-hydroxy ketones by the osmium-catalyzed asymmetric dihydroxylation of the corresponding enol ethers has been achieved.
.alpha.-Hydroxy ketones in high enantiomeric purity from asymmetric dihydroxylation of enol ethers
作者:Tomiki Hashiyama、Kouhei Morikawa、K. Barry Sharpless
DOI:10.1021/jo00045a011
日期:1992.9
Highly enantioselective construction of alpha-hydroxy ketones by the osmium-catalyzed asymmetric dihydroxylation of the corresponding enol ethers has been achieved.
An Expedient Method for the Umpolung Coupling of Enols with Heteronucleophiles**
strategy mediated by a hypervalentiodine(III) reagent for the functionalization of enol derivatives with different heteronucleophiles including carboxylic acids, thiols, alcohols, primary and secondary amines, azides and carbamates generated from CO2. Relevant examples for the derivatization of natural products and pharmaceutical compounds are also presented. The mechanism of the reaction was investigated
一个有用的策略:在此,我们报告了一种由高价碘 (III) 试剂介导的 umpolung 策略,用于用不同的异核亲核试剂(包括羧酸、硫醇、醇、伯胺和仲胺、叠氮化物和由 CO 2产生的氨基甲酸酯)对烯醇衍生物进行官能化。还介绍了天然产物和药物化合物衍生化的相关示例。通过DFT计算和实验研究研究了反应机理。