A straightforward indole synthesis via annulation of C-nitrosoaromatics with conjugated terminal alkynones was realised achieving a simple, highly regioselective, atom- and step economical access to 3-aroylindoles in moderate to good yields. Further functionalizations of indole scaffolds were investigated and an easy way to JWH-018, a synthetic cannabinoid, was achieved.
CuI-Catalyzed Synthesis of Functionalized Terminal Allenes from 1-Alkynes
作者:Hongwen Luo、Shengming Ma
DOI:10.1002/ejoc.201201696
日期:2013.5
equiv.), a facile and efficient protocol for the gram-scale synthesis of functionalizedterminalallenes by using CuI (7.5–10 mol-%), paraformaldehyde (1.6 equiv.), and diisopropylamine (1.4 equiv.) has been developed. This method accommodates different functional groups such as hydroxy or carbonyl, and it also performed well in the synthesis of allenylamides and 2,3-butadien-1-ol.
4-and 5-alkynyloxindoles and 4-and 5-alkenyloxindoles
申请人:Hoffmann-La Roche Inc.
公开号:US06313310B1
公开(公告)日:2001-11-06
Disclosed are 4- and 5-alkynyloxindoles as well as 4- and 5-alkenyloxindoles that inhibit or modulate protein kinases, in particular JNK protein kinases. The compounds of the invention and their pharmaceutically acceptable salts, and prodrugs of said compounds, are useful as anti-inflammatory agents, particularly useful in the treatment of rheumatoid arthritis. Also disclosed are pharmaceutical compositions containing the foregoing compounds, methods for the treatment and/or control of inflammation, particularly in the treatment or control of rheumatoid arthritis using these compounds, as well as intermediates useful in the preparation of compounds of the invention.
A sustainable access to ynones through laccase/TEMPO-catalyzed metal- and halogen-free aerobic oxidation of propargylic alcohols in aqueous medium
作者:Alana B.V. Silva、Emmanuel D. Silva、Alcindo A. dos Santos、Jefferson L. Princival
DOI:10.1016/j.catcom.2020.105946
日期:2020.4
Tuning laccase/TEMPO-catalyzed aerobic oxidation of secondary propargylic alcohols in aqueous media was accomplished in order to efficiently synthesize ynones. This study led to the formulation of an effective and sustainable catalytic method for the preparation of mono- and bis-substituted ynones compared with traditional oxidative methods.
Subtle Electronic Effects in Metal-Free Rearrangement of Allenic Alcohols
作者:Venkata R. Sabbasani、Phani Mamidipalli、Huijie Lu、Yuanzhi Xia、Daesung Lee
DOI:10.1021/ol400331r
日期:2013.4.5
and stereoselective rearrangement of allenic alcohols to (E,E)-1,3-dien-2-yl triflates and chlorides was developed under metal-free conditions. Subtle electronic effects of the alkyl and aryl substituents on the carbon bearing the hydroxyl group has a profound impact on the reaction rate and efficiency such that vinyl triflates were obtained from electron-deficient substrates and trimethylsilyl triflate