Photoredox Mediated Nickel Catalyzed Cross-Coupling of Thiols With Aryl and Heteroaryl Iodides via Thiyl Radicals
作者:Martins S. Oderinde、Mathieu Frenette、Daniel W. Robbins、Brian Aquila、Jeffrey W. Johannes
DOI:10.1021/jacs.5b11244
日期:2016.2.17
Ni-catalyzed cross-couplings of aryl, benzyl, and alkyl thiols with aryl and heteroaryl iodides were accomplished in the presence of an Ir-photoredox catalyst. Highly chemoselective C-Scross-coupling was achieved versus competitive C-O and C-Ncross-couplings. This C-Scross-coupling method exhibits remarkable functional group tolerance, and the reactions can be carried out in the presence of molecular
An ortho-mercaptoaniline derivative having the general formula
wherein X is (H,H) or O; n is 1 or 2; and
R1 is (C1-C6)alkyl or phenyl-(C1-C6)alkylene, optionally substituted at phenyl with a (C1-C6)alkyloxy group;
R2 is (C1-C6)alkyl or (C1-C6)alkyloxymethyl;
R3 is hydrogen or methyl, with the proviso that R3 is hydrogen if R1 is methyl;
and acid addition salts thereof;
a process for the preparation of such a compound, and a pharmaceutical composition comprising such a compound for anti-amoebal action or the treatment of dysentery.
Synthesis of Benzo[4,5]thiazolo[2,3-c][1,2,4]triazole Derivatives via C-H Bond Functionalization of Disulfide Intermediates
作者:Luis G. Ardón-Muñoz、Jeanne L. Bolliger
DOI:10.3390/molecules27051464
日期:——
3-c][1,2,4]triazoles for which two main synthetic approaches exist. Here we report a newsynthetic protocol that allows the preparation of these tricyclic compounds via the oxidation of a mercaptophenyl moiety to its corresponding disulfide. Subsequent C-H bond functionalization is thought to enable an intramolecular ring closure, thus forming the desired benzo[4,5]thiazolo[2,3-c][1,2,4]triazole. This
Synthesis and characterization of a new dinuclear ruthenium(II) complex with a bridging P/S-ligand
作者:Mark R. J. Elsegood、Mehmet Karakus、Thomas A. Noble、Martin B. Smith
DOI:10.1080/10426507.2018.1542396
日期:2019.5.27
Abstract We describe the synthesis of a new (aminomethyl)phosphine, 1-Ph2PCH2NH2-SCH2C6H4(4-OMe)}C6H4 (L1) with P/S donor capabilities and show that this ligand can bind in a P/S-bridging mode to two RuCl2(C10H14)} fragments. The X-ray crystal structure of [1-Ph2PRuCl2(C10H14)}CH2NH][2-SRuCl2(C10H14)}CH2C6H4(4-OMe)]C6H4 (1) has been determined. Graphical Abstract
Tetradentate ligands are used to form neutral 99m-technetium complexes which may be useful as radiopharmaceuticals e.g. as brain imaging agents. The ligands have the structure ##STR1## where n is 2 or 3, m is 0-4, R is H or substituted or unsubstituted C.sub.1 -C.sub.6 alkyl, provided that one CR.sub.2 group adjacent the starred nitrogen atom represents CO and forms with the adjacent N atom, a --CONH-- amide group, Y is unsubstituted or substituted C.sub.1 -C.sub.6 alkyl, and one of X and X' represents H or a labile thiol protecting group while the other is unsubstituted or substituted C.sub.1 -C.sub.6 alkyl, alkenyl or alkynyl.