[EN] MYOGLOBIN-BASED CATALYSTS FOR CARBENE TRANSFER REACTIONS<br/>[FR] CATALYSEURS À BASE DE MYOGLOBINE POUR RÉACTIONS DE TRANSFERT DE CARBÈNE
申请人:UNIV ROCHESTER
公开号:WO2016086015A1
公开(公告)日:2016-06-02
Methods are provided for carrying out carbene transfer transformations such as olefin cyclopropanation reactions, carbene heteroatom-H insertion reactions (heteroatom = N, S, Si), sigmatropic rearrangement reactions, and aldehyde olefination reactions with high efficiency and selectivity by using a novel class of myoglobin-based biocatalysts. These methods are useful for the synthesis of a variety of organic compounds which contain one or more new carbon-carbon or carbon-heteroatom (N, S, or Si) bond. The methods can be applied for conducting these transformations in vitro (i.e., using the biocatalyst in isolated form) and in vivo (i.e., using the biocatalyst in a whole cell system).
Intermolecular carbene S–H insertion catalysed by engineered myoglobin-based catalysts
作者:Vikas Tyagi、Rachel B. Bonn、Rudi Fasan
DOI:10.1039/c5sc00080g
日期:——
The first example of a biocatalytic strategy for the synthesis of thioethers via an intermolecular carbene S–H insertion reaction is reported. Engineered variants of sperm whale myoglobin were found to efficiently catalyze this C–S bond forming transformation across a diverse set of aryl and alkyl mercaptan substrates and α-diazoester carbene donors, providing high conversions (60–99%) and high numbers
Indolobenzoquinoline derivatives, their preparation and their use as anti-arrhythmic drugs
申请人:Sankyo Company Limited
公开号:EP0415776A2
公开(公告)日:1991-03-06
Optically active compounds of formula (I):
in which R1 is hydrogen or alkyl; Xb and Yb are hydrogen or hydroxy; and Z is -NRaRb in which Ra and Rb are hydrogen, alkyl or hydroxyalkyl, or a cyclic amino group;
and pharmaceutically acceptable salts thereof have enhanced anti-arrhythmic activity and may be prepared by a stereospecific synthesis process.
Biomass derived β-cyclodextrin-SO<sub>3</sub>H as a solid acid catalyst for esterification of carboxylic acids with alcohols
作者:Raju S. Thombal、Amol R. Jadhav、Vrushali H. Jadhav
DOI:10.1039/c4ra16699j
日期:——
A novel b-cyclodextrin-SO3H carbon based solid acid catalyst was prepared and proved highly efficient in solvent free esterification of carboxylic acids with alcohols. The catalyst was easily recovered and reused without any impact on the yields.
Alkadiene derivatives, and pharmaceutical compositions containing them
申请人:Rhone-Poulenc Sante
公开号:US04971979A1
公开(公告)日:1990-11-20
Substituted alkadienes of formula: ##STR1## in which R.sub.1 is hydroxy or acetoxy, R.sub.2 is hydrogen, carboxy, alkoxycarbonyl, phenyl or benzoyl, and R.sub.3 is alkylthio or alkoxy and R.sub.4 is naphthoyl or optionally substituted benzoyl, or R.sub.3 is alkoxycarbonyl, cycloalkyloxycarbonyl or cyano and R.sub.4 is alkyl, naphthyl, optionally substituted phenyl, alkylthio, naphthylmethanethio, optionally substituted benzylthio, optionally substituted phenylthio, naphthylthio, phenethylthio or allylthio, or R.sub.3 and R.sub.4 form, with the carbon atom to which they are attached, a ring-system of formula: ##STR2## in which R.sub.5 is hydrogen or alkoxy and X is methylene or S inhibit 5-lipoxygenase and are useful, for example, as anti-inflammatories.