Reaction of tetraazathiapentalene and thiadiazolopyrimidine derivatives with heterocumulenes: Cycloaddition and elimination reactions via hypervalent sulfur …

…, A Ito, M Tomura, Y Okumura, K Mizuno

Index: Matsumura, Noboru; Ito, Atsushi; Tomura, Masaaki; Okumura, Yasuyuki; Mizuno, Kazuhiko Journal of Heterocyclic Chemistry, 2004 , vol. 41, # 1 p. 99 - 102

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Citation Number: 2

Abstract

Abstract Tetraazathiapentalene derivative 1 reacts with heterocumulenes such as diphenylketene (2) and 2-pyridylisothiocyanate (5) to give heterocycles 3, 6 and 7 with elimination of methylisothiocyanate. The reactions of thiadiazolopyrimidine derivatives 8a-b with ethoxycarbonyl isothiocyanate (9) and carbon disulfide (11) gives heterocycles 10 and 12 via thermal decomposition of 1: 1 cycloadducts C and D which have a hypervalent ...