Synthesis of pyrazolone derivatives.-12-Synthesis of 3-mercaptomethyl-2-methyl-4-substituted-1-phenyl-3-pyrazolin-5-one

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  • Synthesis of Pyrazolone Derivatives. XII. Synthesis of 3-Mercaptomethyl-2-methyl-4-substituted-1-phenyl-3-pyrazolin-5-one

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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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