Provided is a method of producing a conjugated diene, including a step of dehydrating a γ,δ-unsaturated alcohol in the presence of a solid acid catalyst having a Hammett acidity function (H
0
) of −12.2 or less.
On the Regioselectivity of the Intramolecular [2 + 2]-Photocycloaddition of Alk-3-enyl Tetronates
作者:Roland Weixler、Jörg P. Hehn、Thorsten Bach
DOI:10.1021/jo201066d
日期:2011.8.5
The simple diastereoselectivity and the regioselectivity of the [2 + 2]-photocycloaddition of alk-3-enyl tetronates were studied, depending on the nature of the substituent R in the α-position. Fourteen tetronates were synthesized and their intramolecular photocycloaddition reactions performed. If R was an alkoxycarbonyl group and if the olefin, which underwent the intramolecular addition, was sterically
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.