Stereoselective synthesis of 4-substituted-cyclic sulfamidate-5-carboxylates by asymmetric transfer hydrogenation accompanied by dynamic kinetic resolution and applications to concise stereoselective syntheses of (−)-epi-cytoxazone and the taxotere side-chain
Ruthenium-Catalyzed Tandem Olefin Metathesis−Oxidations
摘要:
The utility of Grubbs' 2nd generation metathesis catalyst has been expanded by the development of two tandem olefin metathesis/oxidation protocols. These ruthenium-catalyzed processes provide cis-diols or r-hydroxy ketones from simple olefinic starting materials.
The RuO<sub>4</sub>-Catalyzed Ketohydroxylation. Part 1. Development, Scope, and Limitation
作者:Bernd Plietker
DOI:10.1021/jo048822s
日期:2004.11.1
procedure allows the recovery of the ruthenium catalyst by precipitation while simplifying the overall product purification. The second part of the paper focuses on exploration of scope and limitation. A variety of substituted olefins are oxidized to α-hydroxy ketones in good to excellent regioselectivities and yield. Cyclic substrates proved to be problematic to oxidize; however, a careful analysis
RuO<sub>4</sub>-Catalyzed Ketohydroxylation of Olefins
作者:Bernd Plietker
DOI:10.1021/jo034864p
日期:2003.9.1
A new mild method for the oxidation of a variety of olefins to alpha-hydroxy ketones is described. Using the concept of a nucleophilic reoxidant, different olefins were ketohydroxylated with high regioselectivity in good to excellent yields.
Stereoselective synthesis of 4-substituted-cyclic sulfamidate-5-carboxylates by asymmetric transfer hydrogenation accompanied by dynamic kinetic resolution and applications to concise stereoselective syntheses of (−)-epi-cytoxazone and the taxotere side-chain
作者:Jin-ah Kim、Yeon Ji Seo、Soyeong Kang、Juae Han、Hyeon-Kyu Lee
DOI:10.1039/c4cc06395c
日期:——
DKR driven, asymmetric transfer hydrogenations of cyclic sulfamidate imine-5-carboxylates were developed.
DKR驱动的不对称转移氢化反应已经成功开发,用于环状磺胺酸酯亚胺-5-羧酸酯。
Ruthenium-Catalyzed Tandem Olefin Metathesis−Oxidations
作者:Andrew A. Scholte、Mi Hyun An、Marc L. Snapper
DOI:10.1021/ol061837n
日期:2006.10.1
The utility of Grubbs' 2nd generation metathesis catalyst has been expanded by the development of two tandem olefin metathesis/oxidation protocols. These ruthenium-catalyzed processes provide cis-diols or r-hydroxy ketones from simple olefinic starting materials.