Abstract
As a part of studies on syntheses of pyrazolone derivatives, 3-mercaptomethyl-2-methyl-4-substituted-1-phenyl-3-pyrazolin-5-one were prepared by the reaction of 3-bromomethyl-2-methyl-4-substituted-1-phenyl-3-pyrazolin-5-one with thiourea and alkaline treatment, the reduction of 1, 1-bis(2-methyl-4-substituted-5-oxo-1-phenyl-3-pyrazolin-3-yl)methyl disulfide and (2-methyl-4-substituted-5-oxo-1-phenyl-3-pyrazolin-3-yl)methyl thiocyanate.
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