128789-54-8Relevant academic research and scientific papers
Novel Preparation of 1-Aryl-3-(2-hydroxyphenyl)-2-pyrazolin-5-ones and their Conversion into 2-Aryl-4-methyl[1] benzopyrano[4,3-c] pyrazol-3(2H)-ones
Froggett, Jayne A.,Hockley, Michael H.,Titman, Roger B.
, p. 30 - 31 (1997)
1-Aryl-3-(2-hydroxyphenyl)-2-pyrazolin-5-ones are prepared from 4-hydroxycoumarin and arylhydrazines and then cyclised with triethyl orthoacetate to give 2-aryl-4-methyl[1]benzopyrano[4,3-c]pyrazol-3(2H)-ones.
Therapeutic agents
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, (2008/06/13)
This invention relates to compounds of formula I wherein R1 represents hydrogen or together with R2 represents a bond; R2 together with either one of R1 and R3 represents a bond; R3 together with either one of R2 and R4 represents a bond; R4 represents hydrogen or together with R3 represents a bond; R5 represents hydrogen or methyl; R6 represents hydrogen, halo, a C2 6 alkanoyl group, a C2 6 alkoxycarbonyl group, a C1 6 alkylthio group, a C1 6 alkylsulphinyl group, a C1 6 alkylsulphonyl group, carbamoyl, carboxy, or R5 and R6 together with the carbon atom to which they are attached represent a cyclopropyl group; R7 represents hydrogen, halo, trifluoromethyl, methoxy, a C1 6 alkyl group, a C1 6 alkylthio group or a C1 6 alkylsulphinyl group; R8 represents hydrogen, halo or trifluoromethyl; R9 and R10, which may be the same or different, each represent halo; or R9 represents hydrogen and R10 represents hydrogen, halo, trifluoromethyl, hydroxy, nitro, a C2 6 alkanoyloxy group, a C1 6 alkyl group or a C1 6 alkoxy group, which have immunomodulatory activity. Compositions containing these compounds and processes to make them are also disclosed.
