Process for production of optically active 3-methyladipic acid
申请人:NIPPON OIL CO. LTD.
公开号:EP0481711A2
公开(公告)日:1992-04-22
A process for the production of an optically active 3-methyladipic acid represented by the formula (I):
wherein the symol * represents an asymmetric carbon atom, comprising the steps of culturing a microorganism belonging to the genus Candida and capable of producing the optically active 3-methyladipic acid in a medium containing squalene, to produce an optically active 3-methyladipic acid; and recovering the optically active 3-methyladipic acid from the cultured product.
Ruthenium-Catalyzed Oxidative Cleavage of Olefins to Aldehydes
作者:Dan Yang、Chi Zhang
DOI:10.1021/jo010122p
日期:2001.7.1
Three oxidation protocols have been developed to cleave olefins to carbonyl compounds with ruthenium trichloride as catalyst (3.5 mol %). These methods convert olefins that are not fully substituted to aldehydes rather than carboxylic acids. While aryl olefins were cleaved to aromatic aldehydes in excellent yields by using the system of RuCl3-Oxone-NaHCO3 in CH3CN-H2O (1.5: 1), aliphatic olefins were converted into alkyl aldehydes with RuCl3-NaIO4 in 1,2-dichloroethane-H2O (1:1) in good to excellent yields. It is noteworthy that terminal aliphatic olefins were cleaved to the corresponding aldehydes in excellent yields by using RuCl3-NaIO4 in CH3CN-H2O (6:1).
Homoenolic radical derived from propionic acid: A versatile reagent for the radical version of the Michael reaction
作者:Francisco Foubelo、Francisco Lloret、Miguel Yus
DOI:10.1016/s0040-4020(01)88320-4
日期:1992.1
The homoenolic radical, derived from 3-iodopropionic acid (1) by reaction with in situ generated tributyltin hydride, undergoes dean carbon-carbon forming reaction with electrophilic olefins (2) yielding functionalized acids (3).