Radical-Mediated Strategies for the Functionalization of Alkenes with Diazo Compounds
作者:Yong-Liang Su、Geng-Xin Liu、Jun-Wen Liu、Linh Tram、Huang Qiu、Michael P. Doyle
DOI:10.1021/jacs.0c05183
日期:2020.8.12
reported. Here we report a novel reaction of diazo compounds utilizing a radical-mediated addition strategy to achieve difunctionalization of diverse alkenes. Diazo compounds are transformed to carbon radicals with a photocatalyst or an iron catalyst through PCET processes. The carbon radical selectively adds to diverse alkenes delivering new carbon radical species, then forms products through hydroalkylation
Uncovering the On-Pathway Reaction Intermediates for Metal-Free Atom Transfer Radical Addition to Olefins through Photogenerated Phenalenyl Radical Anion
作者:Paramita Datta、Debojyoti Roy、Divya Jain、Shiv Kumar、Swagata Sil、Anup Bhunia、Jyotishman Dasgupta、Swadhin K. Mandal
DOI:10.1021/acscatal.3c05688
日期:2024.3.1
powerful approach for atom transfer radicaladdition (ATRA) while generating the desired intermediates that are otherwise difficult to access with traditional methods. However, photoredox ATRA with organic photosensitizers is rare, giving an opportunity for metal-free routes to complex organic synthesis. Here, we demonstrate exquisite control of product selectivity for addition reactions of in situ generated
[EN] NAPHTHALENE AMIDES HAVING LEUKOTRIENE-ANTAGONISTIC ACTION<br/>[FR] AMIDES DE NAPHTALENE A ACTION ANTAGONISTE DES LEUCOTRIENES
申请人:LABORATORIOS MENARINI S.A.
公开号:WO1996004267A1
公开(公告)日:1996-02-15
(EN) Naphthalene amides of formula (I) wherein the substituent containing A is bound to the 6- or 7- position of the 2-naphthol system; the substituent containing B is bound to the benzene ring at any free position; R1 is hydrogen or methyl; R2 is hydrogen, fluorine, chlorine or -OCH3, which is bound to the naphthalene system at any positions except the 2- and the one occupied by the other substituent; R3 is hydrogen, fluorine, chlorine or bromine; A- is -CO-NR4- or -NR4-CO- group, wherein R4 is hydrogen or methyl; B is a 5-tetrazolyl or -COOR5 group, wherein R5 is hydrogen, a (C1-C4)-alkyl or a phenylalkyl group of less than 10 carbon atoms; m is 0 or 1; n and p are integers from 0 to 6, with the proviso that n + p is less or equal to 6; as well as the solvates and pharmaceutically acceptable salts thereof, have leukotriene antagonistic action.(FR) On décrit des amides de naphtalène de formule (I) où le substituant contenant A est lié à la position 6- ou 7- du système 2-naphtol, le substituant contenant B est lié au cycle benzène en toute position libre; R1 représente hydrogène ou méthyle; R2 représente hydrogène, fluor, chlore ou -OCH3, qui est lié au système naphtalène en toute position, sauf la 2- et celle occupée par l'autre substituant; R3 représente hydrogène, fluor, chlore ou brome; A- représente un groupe -CO-NR4- ou -NR4-CO- où R4 représente hydrogène ou méthyle; -B représente un groupe 5-tétrazolyle ou -COOR5 ou R5 représente hydrogène, un groupe (C1-4)-alkyle ou phényalkyle doté de moins de 10 atomes de carbone; m vaut 0 ou 1; n et p représentent des nombres entiers de 0 à 6, à condition que n + p soit inférieur ou égal à 6. On décrit aussi leur solvates et leurs sels pharmacologiquement acceptables, qui présentent, tout comme ces amides, une action antagoniste des leucotriènes.
NAPHTHALENE AMIDES HAVING LEUKOTRIENE-ANTAGONISTIC ACTION