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.
[EN] RAPID CONSTRUCTION OF TETRALIN, CHROMANE, AND INDANE MOTIFS VIA CYCLATIVE C-H/C-H COUPLING<br/>[FR] CONSTRUCTION RAPIDE DE MOTIFS DE TÉTRALINE, DE CHROMANE ET D'INDANE PAR COUPLAGE C-H/C-H PAR CYCLISATION
申请人:SCRIPPS RESEARCH INST
公开号:WO2022103752A1
公开(公告)日:2022-05-19
Disclosed herein is a process for achieving a palladium-catalyzed cyclative C(sp3)-H/C(sp2)-H coupling reaction using a native free carboxylic acid as a directing group, an amino acid ligand, and oxidant. The process is useful for synthesizing a range of biologically important scaffolds, including tetralins, chromanes, and indanes.
Rapid Construction of Tetralin, Chromane, and Indane Motifs via Cyclative C–H/C–H Coupling: Four-Step Total Synthesis of (±)-Russujaponol F
作者:Zhe Zhuang、Alastair N. Herron、Shuang Liu、Jin-Quan Yu
DOI:10.1021/jacs.0c12484
日期:2021.1.20
important scaffolds, including tetralins, chromanes, and indanes, can be easily prepared by this protocol. Finally, the synthetic application of this methodology is demonstrated by the concise totalsynthesis of (±)-russujaponol F in a four-step sequence starting from readily available phenylacetic acid and pivalic acid through sequential functionalizations of four C-H bonds.
实际的 CH/CH 偶联反应的开发仍然是一项具有挑战性但具有吸引力的合成冒险,因为它避免了对两个偶联伙伴进行预功能化以生成 CC 键的需要。在此,我们报告了由基于环戊烷的单-N-保护的 β-氨基酸配体实现的游离脂肪酸的环化 C(sp3)-H/C(sp2)-H 偶联反应。该反应使用廉价的过碳酸钠 (Na2CO3·1.5H2O2) 作为唯一的氧化剂,并生成水作为唯一的副产物。该协议可以很容易地制备一系列生物学上重要的支架,包括四氢萘、色烷和茚满。最后,