REGIOSELECTIVE S→ N ALLYLIC TRANSPOSITION OF 3-ALLYLTHIO 1, 2, 4-TRIAZINONE WITHOUT SOLVENT, AND CATALYST UNDER MICROWAVE …

…, MA Nooshabadi, K Aghapoor

Index: Heravi; Nooshabadi; Aghapoor Phosphorus, Sulfur and Silicon and Related Elements, 2000 , vol. 164, p. 95 - 101

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Citation Number: 5

Abstract

Abstract The facile and regioselective cyclization of 3-allylsulfanyl-6-methyl-2H-[1, 2, 4-] triazin-5-one 2 to 3, 6-dimethyl-2, 3-dihydro-thiazolo [3, 2-. b.][1, 2, 4] triazin-7-one 3 has been performed by the catalytic action of H2SO4. Compound 2 underwent [3, 3] sigmatropic shift under microwave irradiation to afford 4N allyl derivative 5 in fairly good yield. Treatment of 5 with conc, sulphuric acid afforded the corresponding 2-methyl thiazolo [2, 3-c] ...