54013-18-2Relevant articles and documents
Azosemide intermediate synthesizing method
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Paragraph 0029; 0030; 0031, (2017/07/20)
The invention discloses an azosemide intermediate synthesizing method. The method comprises the steps of performing tetrazole reaction to prepare a compound A: warming and enabling 4-chlorin-2-nitro benzonitrile and sodium azide to react under action of a catalyst and extracting reaction liquid by water to obtain reaction liquid of the compound A; directly performing hydrogenation reaction to prepare a compound B; performing chlorosulfonation reaction to prepare a compound C: slowly dropping qualified compound B and chlorosulfonic acid into cold water after temperature reaction and center control qualification, extracting through an organic solvent, standing for layering and decompressing, evaporating and drying the solvent in an organic phase mode to obtain a compound crude product C; performing ammonolysis reaction to prepare a compound D. Compared with the prior art, raw materials of the method disclosed by the invention are easy to obtain and low in cost; the method is low in cost, convenient to operate, suitable for industrialization and little in generated three wastes; furthermore, comprehensive utilization of waste can meet national industrial policy.
Synthesis of diverse azolo[c]quinazolines by palladium(II)- catalyzed aerobic oxidative insertion of isocyanides
Vlaar, Tjostil,Bensch, Lisa,Kraakman, Jasper,Vande Velde, Christophe M. L.,Maes, Bert U. W.,Orru, Romano V. A.,Ruijter, Eelco
supporting information, p. 1205 - 1209 (2014/05/06)
We report the palladium(II)-catalyzed aerobic oxidative coupling of isocyanides with various (2-aminophenyl)azoles using air as the stoichiometric oxidant. A diverse range of medicinally valuable azolo[c]quinazolines was obtained by this new approach.
DIARYLUREA DERIVATIVES AND THEIR USE AS CHLORIDE CHANNEL BLOCKERS
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Page 36, (2008/06/13)
The present invention relates to novel diarylurea derivatives useful as chloride channel blockers. In other aspects the invention relates to the use of these compounds in a method for therapy, such as for the treatment of bone metabolic diseases, diseases responsive to modulation of the mast cell or basophil activity, diseases responsive to inhibition of angiogenesis, or sickle cell anaemia, and to pharmaceutical compositions comprising the compounds of the invention.