Synthesis of <i>Z</i>- or <i>E</i>-Trisubstituted Allylic Alcohols and Ethers by Kinetically Controlled Cross-Metathesis with a Ru Catechothiolate Complex
作者:Chaofan Xu、Zhenxing Liu、Sebastian Torker、Xiao Shen、Dongmin Xu、Amir H. Hoveyda
DOI:10.1021/jacs.7b10010
日期:2017.11.8
kinetically controlled cross-metathesis reactions that generate Z- or E-trisubstituted alkenes are disclosed. Transformations are catalyzed by ≤6.0 mol % of a Ru catechothiolate complex and afford trisubstituted allylic alcohols and ethers in up to 81% yield and >98% stereoisomeric purity. The method has considerable scope, as olefins containing an alcohol, an aldehyde, an epoxide, a carboxylic acid, or an
Longestin (KS‐505a), a specific inhibitor of phosphodiesterase, is a meroterpenoid that consists of a unique octacyclic terpene skeleton with branched methyl groups at unusual positions (C1 and C12). Biochemical analysis of Lon23, a methyltransferase involved in the biosynthesis of longestin, demonstrated that it methylates homoisopentenyl diphosphate (homo‐IPP) to afford (3Z)‐3‐methylIPP. This compound
High Versatility of IPP and DMAPP Methyltransferases Enables Synthesis of C
<sub>6</sub>
, C
<sub>7</sub>
and C
<sub>8</sub>
Terpenoid Building Blocks
作者:Laura Drummond、Parab J. Haque、Binbin Gu、Julia S. Jung、Hendrik Schewe、Jeroen S. Dickschat、Markus Buchhaupt
DOI:10.1002/cbic.202200091
日期:2022.7.19
Nearly all known terpenes are built from the two C5 precursors DMAPP and IPP. This work characterizes several bacterial DMAPP and IPPmethyltransferases that convert these buildingblocks in C6, C7 and C8 prenyl pyrophosphates with selectivity on deprotonation sites and stereoselectivity.
几乎所有已知的萜烯都是由两种 C5 前体 DMAPP 和 IPP 构建而成。这项工作表征了几种细菌 DMAPP 和 IPP 甲基转移酶,这些酶可将这些结构单元转化为 C 6 、C 7和 C 8异戊二烯基焦磷酸,具有去质子化位点选择性和立体选择性。
Substrate-Directed Enantioselective Aziridination of Alkenyl Alcohols Controlled by a Chiral Cation
作者:Alexander Fanourakis、Nicholas J. Hodson、Arthur R. Lit、Robert J. Phipps
DOI:10.1021/jacs.3c00693
日期:——
Alkeneaziridination is a highly versatile transformation for the construction of chiral nitrogen-containing compounds. Inspired by the success of analogous substrate-directed epoxidations, we report an enantioselective aziridination of alkenyl alcohols, which enables asymmetric nitrene transfer to alkenes with varied substitution patterns, including those not covered by the current protocols. We believe
METHOD FOR THE PRODUCTION OF ISOPRENOIDS BY HETEROLOGOUS EXPRESSION OF A PROTEIN IN A MICROORGANISM
申请人:DECHEMA -Forschungsinstitut
公开号:EP3425051A1
公开(公告)日:2019-01-09
The present disclosure relates to a method for the production of isoprenoids by heterologous expression of a protein in a microorganism.
The present disclosure relates to an alkyl transferase capable of catalyzing one or more alkylation(s) of isopentenyl-pyrophosphate.
The present disclosure also relates to an alkyl transferase capable of catalyzing the one or more methylation(s) of isopentenyl-pyrophosphate and optionally the one or more isomerization(s) of isopentenyl-pyrophosphate or alkylated isopentenyl-pyrophosphate.
The methyltransferase was obtained from Streptomyces monomycini.