Selective one-pot alkylation or allylation of ketones in the presence of α,β-unsaturated ketones (enones) were accomplished by using our in situ protection methodology. Enones selectively react with a combination of PPh3 and silyl triflates in the presence of ketones to produce phosphonium silyl enol ethers, which act as protective groups for the enones during the alkylation or allylation of ketones
[EN] BIOTECHNOLOGICAL PRODUCTION OF DIOLS<br/>[FR] PRODUCTION BIOTECHNOLOGIQUE DE DIOLS
申请人:SYMRISE AG
公开号:WO2021004614A1
公开(公告)日:2021-01-14
The present invention relates to a method for the stereo selective production of a trans-diol or a cis-diol or a hydroxyketone comprising the step(s) (i) conversion of a trans-diol or a cis-diol to a hydroxyketone and/or (ii) conversion of a hydroxyketoneto a cis-diol or a trans-diol, catalyzed by an enzyme, which is encoded by a nucleic acid sequence of SEQ ID NO: or wherein the enzyme comprises an amino acid sequence of SEQ ID NO: 2.The present invention also relates to the use of an enzyme encoded by a nucleic acid sequence of SEQ ID NO: 1 or wherein the enzyme comprises an amino acid sequence of SEQ ID NO: 2 for the conversion of a trans-diol to a cis-diol or for the conversion of a trans-diol or a cis-diol to a hydroxyketone and/or the conversion of a hydroxyketone to a trans-diol or a cis-diol.
本发明涉及一种立体选择性制备顺式-二醇或反式-二醇或羟基酮的方法,包括以下步骤:(i)将顺式-二醇或反式-二醇转化为羟基酮和/或(ii)将羟基酮转化为反式-二醇或顺式-二醇,由编码SEQ ID NO:的核酸序列所编码的酶催化,或者酶包含SEQ ID NO: 2的氨基酸序列。本发明还涉及使用由SEQ ID NO: 1的核酸序列编码的酶或酶包含SEQ ID NO: 2的氨基酸序列,用于将反式-二醇转化为顺式-二醇或将顺式-二醇或反式-二醇转化为羟基酮和/或将羟基酮转化为反式-二醇或顺式-二醇的方法。
Amino acid and protein specificity of protein fatty acylation in
<i>Caenorhabditis elegans</i>
作者:Bingsen Zhang、Yan Yu、Bennett W. Fox、Yinong Liu、Venkatesh P. Thirumalaikumar、Aleksandra Skirycz、Hening Lin、Frank C. Schroeder
DOI:10.1073/pnas.2307515121
日期:2024.1.30
Proceedings of the National Academy of Sciences, Volume 121, Issue 5, January 2024.
《美国国家科学院院刊》,第 121 卷,第 5 期,2024 年 1 月。
Procédé pour la préparation d'hydroxy-cétones
申请人:FIRMENICH SA
公开号:EP0071708A1
公开(公告)日:1983-02-16
Les hydroxy-cétones de formule
possédant une double liaison dans l'une des positions indiquées par les pointillés, sont préparées à partir d'un carbinol diallylique de formule
par traitement de celui-ci avec une base forte dans un solvant inerte.
Comme base forte, le tert-butylate de potassium est utilisé de préférence.
Les hydroxy-cétones (la, b) sont utiles en tant qu'intermédiaires pour la préparation d'oxyde de rose.
A stream of raw phenol, outcoming from the process of production of phenol and acetone from cumene, via cumene hydroperoxide, is purified by means of a combination of treatments of distillation and on silico-aluminates treated with acid.