A non-natural biosynthesis pathway toward 2-methylisoborneol
作者:Binbin Gu、Jeroen S. Dickschat
DOI:10.1039/d2cc00636g
日期:——
The biosynthesis of 2-methylisoborneol was reconstituted by elongation of dimethylallyl diphosphate (DMAPP) with (S)- and (R)-2-methylisopentenyl diphosphate (2-Me-IPP) using farnesyl diphosphate synthase (FPPS), followed by terpene cyclisation. The stereochemicalcourse of the FPPS reaction was studied in detail using stereoselectively deuterated 2-Me-IPP isotopomers.
2-甲基异冰片的生物合成通过使用法尼基二磷酸合酶 (FPPS) 用 ( S )- 和 ( R )-2-甲基异戊烯基二磷酸 (2-Me-IPP)延伸二甲基烯丙基二磷酸 (DMAPP) 进行重组,然后进行萜烯环化。使用立体选择性氘代 2-Me-IPP 同位素对 FPPS 反应的立体化学过程进行了详细研究。
The development and use of a general route to brassinolide, its biosynthetic precursors, metabolites and analogues
作者:A. L. Hurski、Yu. V. Ermolovich、V. N. Zhabinskii、V. A. Khripach
DOI:10.1039/c4ob02197e
日期:——
A new method for the construction of steroid sidechains through the addition of lithium salts of dithianes to a C-22 aldehyde was developed. An efficient one-pot procedure for the preparation of a suitable C-22 aldehyde from commercial epibrassinolide in three steps in 86% isolated yield was described. Enantioselective hydroxymethylation of isovaleraldehyde and Kulinkovich cyclopropanation of silylated
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。
Formal Synthesis of Leucascandrolide A
作者:David R. Williams、Scott V. Plummer、Samarjit Patnaik
DOI:10.1002/anie.200351817
日期:2003.8.25
Studies for the enantiocontrolled preparation of substituted tetrahydropyrans: applications for the synthesis of leucascandrolide A macrolactone
作者:David R. Williams、Scott V. Plummer、Samarjit Patnaik
DOI:10.1016/j.tet.2011.05.020
日期:2011.7
Strategies for the stereocontrolled preparations of 2,6-cis- and 2,6-trans-substituted tetrahydropyrans have been devised. These studies have explored methodology for asymmetric induction in S-E' reactions using chiral 1,3,2-diazaborolidine controllers. Reactions with aldehydes at -78 degrees C yield nonracemic 1,5-diols for chemoselective internal backside displacements. This concept is developed as a flexible and reliable strategy in studies toward leucascandrolide A macrolactone 2 via the sequential applications of S-E' reactions leading to the C-1-C-9 aldehyde 14, and the bis-tetrahydropyran 59, respectively. (C) 2011 Elsevier Ltd. All rights reserved.