An economically and environmentally sustainable synthesis of 2-aminobenzothiazoles and 2-aminobenzoxazoles promoted by water
作者:Xinying Zhang、Xuefei Jia、Jianji Wang、Xuesen Fan
DOI:10.1039/c0gc00418a
日期:——
Tandemreactions of isothiocyanates (1) with 2-aminothiophenols (2), or isothiocyanates (1) with 2-aminophenols (4), were carried out rapidly and efficiently in water. A significant rate acceleration of the reaction between 1a and 2a in water compared with commonly used volatile organic solvents was observed. Through these reactions, a variety of structurally and pharmaceutically interesting 2-aminobenzothiazoles
[EN] DIARYLAMINE-SUBSTITUTED QUINOLONES USEFUL AS INDUCIBLE NITRIC OXIDE SYNTHASE INHIBITORS<br/>[FR] QUINOLONES SUBSTITUÉES PAR DIARYLAMINE UTILES COMME INHIBITEURS DE L'OXYDE NITRIQUE SYNTHASE INDUCTIBLE.
申请人:KALYPSYS INC
公开号:WO2009029617A1
公开(公告)日:2009-03-05
Novel diarylamine-substituted quinolone compounds and pharmaceutical compositions, certain of which have been found to inhibit inducible NOS synthase have been discovered, together with methods of synthesizing and using the compounds including methods for the treatment of iNOS-mediated diseases in a patient by administering the compounds.
Various N-aryl-2-aminobenzoxazoles and N-aryl-2-aminobenzothiazoles were synthesized from o-aminophenol and o-aminothiophenol, respectively, mediated by dithiocarbamate in one step. The salient features of this method include mild reaction condition, high yield and large scale synthesis. Application of this methodology has been demonstrated by synthesizing potent Aurora kinase-A inhibitors.
Copper/<i>N,N,N′,N′</i>-Tetramethylethylenediamine-Catalyzed Synthesis of<i>N</i>-Substituted Benzoheterocycles<i>via</i>CS Cross- Coupling at Ambient Temperature in Water
作者:Na Zhao、Liang Liu、Fei Wang、Jia Li、Wu Zhang
DOI:10.1002/adsc.201400043
日期:2014.8.11
AbstractCopper/N,N,N′,N′‐tetramethylethylenediamine (Cu/TMEDA)‐catalyzed ambient temperature tandem reactions of isothiocyanates with 2‐iodophenols or 2‐iodoanilines in water without the protection of an inert atmosphere are described, which provide a simple, rapid, environmental method for the synthesis of a variety of 2‐iminobenzo‐1, 3‐ oxathioles and 2‐aminobenzothiazoles in good yields. More important, the present reaction process needs only low amounts of copper catalyst (<1 mol%) and can yield the products on a gram scale.magnified image
Water-Mediated Synthesis of Benzazole and Thiourea Motifs by Reacting Naturally Occurring Isothiocyanate with Amines
An efficient, green, and facile method has been developed for the synthesis of benzazole and thiourea analogues from naturally occurring erucin in moderate to good yields. The reaction was carried out in water without using any metal catalyst or base. The present method tolerated the various functional groups on aromatic rings and also applicable for other isothiocyanates.