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,
Pd/Cu-Catalyzed Cascade C(sp<sup>3</sup>)–H Arylation and Intramolecular C–N Coupling: A One-Pot Synthesis of 3,4-2<i>H</i>-Quinolinone Skeletons
作者:Han-Zhi Xiao、Wen-Shu Wang、Yu-Song Sun、Hao Luo、Bo-Wen Li、Xiao-Dong Wang、Wei-Li Lin、Fei-Xian Luo
DOI:10.1021/acs.orglett.9b00214
日期:2019.3.15
In this letter, we successfully explored a cascade Pd/Cu-catalyzed intermolecular C(sp3)–H arylation of amides and intramolecular C–N coupling reaction. This method provides a one-pot strategy to synthesize 3,4-2H-quinolinone with good regioselectivity of C–H arylation and C–N coupling from C–I and C–X bonds from readily available starting materials.
Auxiliary-Directed C(sp<sup>3</sup>
)−H Arylation by Synergistic Photoredox and Palladium Catalysis
作者:Milena L. Czyz、David W. Lupton、Anastasios Polyzos
DOI:10.1002/chem.201704045
日期:2017.10.17
Herein we describe the auxiliary‐directedarylation of unactivated C(sp3)−H bonds with aryldiazonium salts, which proceeds under synergistic photoredox and palladium catalysis. The site‐selective arylation of aliphatic amides with α‐quaternary centres is achieved with high selectivity for β‐methyl C(sp3)−H bonds. This operationally simple method is compatible with carbocyclic amides, a range of aryldiazonium
[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.
(−CH2CF3) group into the organic compounds by activating the distal C(sp3)–H bond is a challenging but crucial task in organic chemistry. This transformation imparts unique physicochemical properties to the compounds, such as enhanced lipophilicity, metabolic stability, and altered electronic characteristics. In this study, we unveil a new palladium-catalyzed method to directly introduce the trifluoroethyl