Synthesis of (±)-Puraquinonic Acid: An Inducer of Cell Differentiation
摘要:
Puraquinonic acid (1) was synthesized from 2,5-dimethoxybenzoic acid by way of isochroman 2 and the indanone derivative 3, a Nazarov cyclization being used to construct the five-membered ring.
Divergent Enantioselective Synthesis of (Nor)illudalane Sesquiterpenes via Pd<sup>0</sup>-Catalyzed Asymmetric C(sp<sup>3</sup>)–H Activation
作者:Romain Melot、Marcus V. Craveiro、Thomas Bürgi、Olivier Baudoin
DOI:10.1021/acs.orglett.8b04086
日期:2019.2.1
divergent enantioselectivesynthesis of (nor)illudalane sesquiterpenes was designed by using a Pd0-catalyzed asymmetric C(sp3)–H arylation as a key step to control the isolated, highly symmetric quaternary stereocenter of the target molecules. A matched combination of chiral substrate and catalyst proved optimal to reach good levels of stereoselectivity. This approach enabled the synthesis of three
Total Synthesis of (Nor)illudalane Sesquiterpenes Based on a C(sp<sup>3</sup>)–H Activation Strategy
作者:Romain Melot、Marcus V. Craveiro、Olivier Baudoin
DOI:10.1021/acs.joc.9b01669
日期:2019.10.18
Three (nor)illudalane sesquiterpenes were synthesized from a common intermediate in racemic and enantioenriched forms using Pd0-catalyzed C(sp3)-H arylation as a key step. The configuration of the isolated, highly symmetric quaternary stereocenter of the target molecules was controlled through a matched combination of chiral substrate and catalyst. Moreover, the recently developed Ir-catalyzed C-H
使用Pd0催化的C(sp3)-H芳基化为关键步骤,从外消旋和对映体富集形式的一种常见中间体合成了三(正)伊拉达拉烷倍半萜。通过手性底物和催化剂的匹配组合来控制靶分子的分离的,高度对称的四元立体中心的构型。此外,采用最近开发的Ir催化的CH硼化/ Cu催化的甲基化方法将甲基安装在苯环上。这种策略允许高效合成外消旋和(S)构型的嘌呤奎尼酸,地喹醌和russujaponol F.
A synthesis of puraquinonic acid
作者:Soleiman Hisaindee、Derrick L.J Clive
DOI:10.1016/s0040-4039(01)00144-7
日期:2001.3
2-Methyl-1,4-benzenediol (10) was acylated with alpha -chloroisobutyroyl chloride and converted by treatment with AlCl3 into the indanone derivative 12, which was elaborated into the substituted indane acid 24. Oxidation then afforded racemic puraquinonic acid. (C) 2001 Elsevier Science Ltd. All rights reserved.