Bioconversion of aromatic compounds by Escherichia coli that expresses cytochrome P450 CYP153A13a gene isolated from an alkane-assimilating marine bacterium Alcanivorax borkumensis
摘要:
The cytochrome P450 CYP153 family has been isolated from alkane-assimilating bacteria. CYP153 has been shown to mediate terminal hydroxylations of linear alkanes or alkyl aromatics. We here performed the biotransformation of various aromatic compounds by Escherichia coli cells that expressed the CYP153A13a (P450balk) gene, which was isolated from an alkane-degading marine bacterium Alcanivorax borkumensis. Aromatic compounds including a short alkyl moiety or methyl ether moiety, and phenolic compounds were converted to their respective hydroxylated products, whose structures were determined by HRMS and NMR analyses. The present study revealed that the catalytic function of CYP153A13a is multifunctional, i.e., it can hydroxylate not only the terminal of short alkyl groups that attached to aromatic rings but also the p-position of phenolic compounds substituted with a halogen or the acetyl group. CYP153A13a was also shown to demethylate methylether-including aromatic compounds. (C) 2010 Elsevier B.V. All rights reserved.
realized. Remarkably, by using a different copper precursor, the aldehydes obtained can be further hydrogenated to give the corresponding alcohols under the same conditions, formally named as hydroxymethylation of alkenes. Under pressure of syngas, various aldehydes and alcohols can be produced from alkenes with copper as the only catalyst, in excellent regioselectivity. Additionally, an all-carbon quaternary
Synthesis of Alcohols via a Rhodium-Catalyzed Hydroformylation- Reduction Sequence using Tertiary Bidentate Amine Ligands
作者:Lawrence L. W. Cheung、Giuseppe Vasapollo、Howard Alper
DOI:10.1002/adsc.201200053
日期:2012.7.9
The synthesis of alcoholsfrom aromatic olefins is described using a rhodium‐catalyzed hydroformylation–reduction sequence with the assistance of a tertiary diamine ligand. The alcohols are produced in excellent branched to linear ratios and in good to excellent isolated yields. In all cases no aldehyde product, fromhydroformylation, or alkyl product, fromolefinreduction, was detected.
Practical synthesis of pharmaceutically relevant molecules enriched in sp<sup>3</sup> character
作者:Peter S. Campbell、Craig Jamieson、Iain Simpson、Allan J. B. Watson
DOI:10.1039/c7cc08670a
日期:——
A highly efficient and general procedure for the preparation of medicinally relevant compounds with enhanced 3D character is reported.
报道了一种高效且通用的程序,用于制备具有增强的三维特性的具有药用价值的化合物。
Reductive Opening of Oxetanes Catalyzed by Frustrated Lewis Pairs: Unexpected Aryl Migration via Neighboring Group Participation
作者:Luning Tang、Yu Zang、Wengang Guo、Zhengyu Han、Hai Huang、Jianwei Sun
DOI:10.1021/acs.orglett.2c01088
日期:2022.5.6
B(C6F5)3 was found to catalyze an unusual double reduction of oxetanes by hydrosilane with aryl migration via neighboring group participation. Control experiments suggested that the phenonium ion serves as the key intermediate. Minor modification of this protocol also led to simple hydrosilylative opening of oxetanes.
发现B(C 6 F 5 ) 3催化氢硅烷对氧杂环丁烷的异常双重还原,其中芳基迁移通过相邻基团参与。对照实验表明铼离子是关键的中间体。该协议的微小修改也导致了氧杂环丁烷的简单氢化开环。
[EN] HETEROCYCLIC COMPOUNDS FOR THE TREATMENT OF CNS AND CARDIOVASCULAR DISORDERS<br/>[FR] COMPOSES HETEROCYCLIQUES POUR LE TRAITEMENT DES TROUBLES DU SYSTEME NERVEUX CENTRAL ET DES TROUBLES CARDIOVASCULAIRES
申请人:THE UPJOHN COMPANY
公开号:WO1995018118A1
公开(公告)日:1995-07-06
(EN) Novel aromatic bicyclic amines of formula (I) are useful in treating central nervous system disorders and cardiac arrhythmias and cardiac fibrillation.(FR) L'invention concerne de nouvelles amines bicycliques aromatiques de formule (I) destinées à être utilisées pour le traitement des troubles du système nerveux central, des arythmies cardiaques et de la fibrillation cardiaque.