Verfahren zur stereoselektiven Reduktion von 4-Aryl-4-oxobutansäure-derivaten
申请人:BAYER AG
公开号:EP1369410A1
公开(公告)日:2003-12-10
Die vorliegende Erfindung betrifft ein Verfahren zur Herstellung stereoisomerenangereicherter 4-Aryl-4-hydroxybutansäurederivate durch Reduktion von 4-Aryl-4-ketobutansäurederivaten in Gegenwart von Ruthenium enthaltenden Katalysatoren, von mindestens einem Amin, und von Ameisensäure, Formiaten oder Mischungen davon.
Magnesium-Promoted Reductive Carboxylation of Aryl Vinyl Ketones: Synthesis of γ-Keto Carboxylic Acids
作者:Suhua Zheng、Tianyuan Zhang、Hirofumi Maekawa
DOI:10.1021/acs.joc.2c00557
日期:2022.6.3
Direct reductive carboxylation of easily prepared aryl vinylketones under the atmosphere of carbon dioxide led to the selective formation of γ-keto carboxylic acids in 38–86% yields. The reaction is characterized by the carbon–carbon bond formation of carbon dioxide at the β-position of enone, with the use of magnesium turnings that can be easily handled as the reducing agent and the eco-friendly
The Stereoselective Synthesis of 2-Alkyl .gamma.-Keto Acid and Heterocyclic Ketomethylene Peptide Isostere Core Units Using Chiral Alkylation by 2-Triflyloxy Esters
作者:Robert V. Hoffman、Hwa-Ok Kim
DOI:10.1021/jo00121a031
日期:1995.8
A simple and general protocol for the enantioselective preparation of gamma-keto acids and heterocyclic gamma-keto acids which have an alkyl group at C-2 is reported. The alkyl group is introduced by chiral alkylation using a scalemic 2-triflyloxy ester. The alkylation takes place with inversion of configuration and is compatible with a variety of alkyl groups. This methodology is thus well-suited for the preparation of a wide variety of ketomethylene peptide isosteres.
The Synthesis of 5-Methyl-4,7-thionaphthenequinone and Related Compounds