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A CONVENIENT SYNTHESIS OF TETRAHYDRO-1Н-THIENO- [3,2-с]PYRAZOLE 4,4-DIOXIDES

Ирина Е. Ефремова, Анна В. Серебрянникова, Лидия В. Лапшина, Владислав В. Гуржий, Аркадий Е. Рябинин
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Abstract


The reaction of oxidation of 3-aryl-6a-methyl-6-nitrohexahydrothieno[2,3-d]pyrazole 4,4-dioxides by bromine was used to synthesize their derivatives 3-aryl-6a-methyl-6-nitro-3a,5,6,6a-tetrahydro-1H-thieno[3,2-c]pyrazole 4,4-dioxides, the structure of which was established by IR, 1H, 13C, 1H–13C HMQC, 1H–13C HMBC spectroscopy and X-ray structural analysis.

Keywords


pyrazolidines; pyrazolines; sulfolanes; thieno[2,3-d]pyrazole 4,4-dioxides; oxidation.

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