酸热脂环酸鲨烯角鲨烯环化酶已发展成为适合工业规模生产(-)-Ambrox的生物催化剂。一轮随机诱变导致鉴定了三个变体,其(E,E)-同型芳樟醇转化性能比野生型酶提高了约1.5到10倍。总的来说,鉴定出八个不同的氨基酸突变。该酶的活性位点只有一个突变。这三个变体中的每一个仅在酸热脂环酸杆菌角鲨烯Hopene环化酶多肽链的631个氨基酸上仅包含两个或三个突变。导致改善的变异(E,E)-均胺酚转化率得到了确认。对反应条件的研究导致选择了一种变体,通过该变体,针对工艺相关条件优化了反应参数。提出了一种全细胞生物转化过程,其中产生改良的角鲨烯Hopene环化酶变体的大肠杆菌细胞可在≤72小时内转化125 g / L(E,E)-异壬烯醇。通过为工业规模的生物催化角鲨烯Hopene环化酶环化反应建立通用基础,开发出的香精成分(-)-Ambrox作为Ambrofix®的开发方法扩展了生物催化工具箱。
[EN] A SOLID FORM OF (-)-AMBROX FORMED BY A BIOVERVERSION OF HOMOFARNESOL IN THE PRESENCE OF A BIOCATALYST [FR] FORME SOLIDE DE (-)-AMBROX FORMÉE PAR UNE BIOVERVERSION D'HOMOFARNÉSOL EN PRÉSENCE D'UN BIOCATALYSEUR
PROCESS FOR THE PREPARATION OF 4-METHYLPENT-3-EN-1-OL DERIVATIVES
申请人:FIRMENICH SA
公开号:US20150353463A1
公开(公告)日:2015-12-10
The present invention concerns a process for the preparation with high selectivity of a compound of formula (I) by isomerization at room temperature of compound of formula (II) in the presence of a complex of formula [Ru(dienyl)
2
H]X.
[EN] PREPARATION OF HOMOALLYLIC COMPOUNDS BY REACTION OF CYCLOPROPYLVINYL PRECURSORS WITH BRONSTEDT ACIDS<br/>[FR] PRÉPARATION DE COMPOSÉS HOMOALLYLIQUES PAR RÉACTION DE PRÉCURSEURS CYCLOPROPYLVINYLIQUES AVEC DES ACIDES DE BRÖNSTED
申请人:GIVAUDAN SA
公开号:WO2015059293A1
公开(公告)日:2015-04-30
A method of forming homoallylic compounds 2 from cyclopropylvinyl precursors 1 in the presence of a Bronsted acid HQ.
在Bronsted酸HQ的存在下,从环丙基乙烯前体1形成同型烯丙基化合物2的方法。
Unusual Farnesyl Pyrophosphate Synthetase Reaction of an Artificial Substrate with Ni<sup>2+</sup>
Farnesylpyrophosphate (FPP) synthetase catalyzed the condensation of geranyl pyrophosphate (GPP) with 4-methyl-4-pentenyl pyro phosphate in the presence of Ni2+ to give an unexpected product, homofarnesyl pyrophosphate having an exomethylene group, together with Z-homofarnesyl pyrophosphate.
[EN] PROCESS OF MAKING ORGANIC COMPOUNDS<br/>[FR] PROCÉDÉ DE FABRICATION DE COMPOSÉS ORGANIQUES
申请人:GIVAUDAN SA
公开号:WO2022136232A1
公开(公告)日:2022-06-30
There is provided a method for preparing homofarnesol (1), the method comprising the steps of: a) providing farnesyl chloride (2); b) reacting farnesyl chloride (2) to homofarnesate (3) by alkoxycarbonylation; and c) reacting homofarnesate (3) to homofarnesol (1), wherein the configuration of the double bonds in the compounds 1, 2 and 3 is preserved.