Metal-Free C–O Bond Functionalization: Catalytic Intramolecular and Intermolecular Benzylation of Arenes
作者:Luis Bering、Kirujan Jeyakumar、Andrey P. Antonchick
DOI:10.1021/acs.orglett.8b01495
日期:2018.7.6
conditions enabled a catalytic and metal-free Friedel–Craftsalkylation reaction with benzylic alcohols, producing water as the stoichiometric byproduct. A comprehensive scope (>50 examples) for both approaches and application in drug synthesis were demonstrated. Mechanistic studies suggest a Lewis acid-based mechanism for the metal-free Friedel–Crafts reaction.
Abstract In addition to the known isoflavonoids formononetin and (±)-mucronulatol, the vine wood of Dalbergiaecastophyllum (L.) Taub. contains ( R )-8-demethylduartin. The assigned structure (II) has been confirmed by synthesis. Its absolute stereochemistry is deduced from examination of the CD spectrum of its acetate.
摘要 除了已知的异黄酮类黄酮素和 (±)-mucronulatol,黄檀 (L.) Taub 的藤木。含有 ( R )-8-demethylduartin。指定的结构 (II) 已通过合成确认。它的绝对立体化学是从其醋酸盐的 CD 光谱的检查中推导出来的。
Synthesis of homoerythrinadienone by phenolic oxidative coupling
作者:T. Kametani、K. Fukumoto
DOI:10.1039/j39680002156
日期:——
Oxidation of N-(3-hydroxy-4-methoxyphenethyl)-3-(3-hydroxy-4-methoxyphenyl)propylamine (VII) with potassium ferricyanide gave homoerythrinadienone. Our tentatively proposed structure (VIII)6,7,9,10-tetrahydro-12-hydroxy-2,13-dimethoxy-14bH-dibenzo[h,j]quinolizin-3(5H)-one} should be revised to (IX)6,8,9,10-tetrahydro-12-hydroxy-2,13-dimethoxy-14bH-indolo[7a,1-a][2]benzazepin-3(5H)-one}. Phenolic
PROCESS FOR PREPARING GEM-DIFLUORINATED C-GLYCOSIDE COMPOUNDS
申请人:Advanomics Corp.
公开号:EP3530663A1
公开(公告)日:2019-08-28
The present invention concerns the synthesis of a class of gem-difluorinated C-glycoside compounds derived from podophyllotoxin which may be used, but not exclusively, in oncology for the treatment of cancer.
Rh nanoparticles with NiO x surface decoration for selective hydrogenolysis of C O bond over arene hydrogenation
作者:Jiaguang Zhang、Mahmoud Ibrahim、Vincent Collière、Hiroyuki Asakura、Tsunehiro Tanaka、Kentaro Teramura、Karine Philippot、Ning Yan
DOI:10.1016/j.molcata.2016.01.014
日期:2016.10
Surface decoration strategy is applied to design NP catalyst for the selective hydrogenolysis of C-O bond without hydrogenating benzene ring, which is critical in lignin conversion under hydrogen treatment. The synthesized NiOx/Rh NPs are featured with-Rh core whose surface is partially blocked by NiOx which segregated the surface terrace zones into smaller segments, preventing the coordination and hydrogenation of benzene rings. Moreover, the NiOx shows, no electronic modification to the Rh core, thereby the blockage effect of NiOx only inhibits the hydrogenation of benzene ring but not affect the hydrogenolysis activity-of Rh core. (C) 2016 Elsevier B.V. All rights reserved.