69696-56-6Relevant academic research and scientific papers
3(2H)Pyridazinone, process for its preparation and anti-allergic agent containing it
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, (2008/06/13)
A 3(2H)pyridazinone of the formula: STR1 wherein R1 is hydrogen, methyl, C3 -C6 alkenyl, C5 or C6 cycloalkyl, benzyl, phenyl, --(CH2)m CO2 R3 (wherein R3 is hydrogen or C1 -C5 alkyl, and m is an integer of from 1 to 4), --(CH2)n A (wherein A is --OH or --N(R4)2 wherein R4 is C1 -C3 alkyl, and n is an integer of from 2 to 6) or --CH2 CF3 ; R2 is chlorine or bromine; each of Y1 and Y2 which may be the same or different, is hydrogen, C1 -C5 alkyl, C2 -C8 alkenyl, halogen, --OR5 (wherein R5 is hydrogen, C1 -C8 alkyl or STR2 wherein q is an integer of from 1 to 4), --CO2 R6 (wherein R6 is hydrogen or C1 -C5 alkyl), --N(R7)2 (wherein R7 is C1 -C4 alkyl) or --SR8 (wherein R8 is C1 -C4 alkyl); and Y3 is C1 -C5 alkyl, C2 -C8 alkenyl, halogen, --OR5 (wherein R5 is as defined above), --CO2 R6 (wherein R6 is as defined above), --N(R7)2 (wherein R7 is as defined above) or --SR8 (wherein R8 is as defined above), or a pharmaceutically acceptable salt thereof.
