Flash Vacuum Pyrolysis (F.V.P.) of 1,2,4-Benzotriazine Derivatives?.

ZSUZSANNA RIEDL; GYÖRGY HAJÓS; WALTER J. PELÁEZ; IOULIA T. GAFAROVA; ELIZABETH L. MOYANO; GLORIA I. YRANZO

Elsevier Science Ltd.

Año: 2003 vol. 59 p. 851 - 851

lash vacuum pyrolysis of 3-methylsulfanyl-1,2,4-benzotriazine N-oxide, 3-methylsulfanyl-1,2,4-benzotriazine, and 3-phenyl- 1,2,4-benzotriazine are described. The N-oxide derivative underwent deoxygenation between 500 and 6008C, whereas at higher temperatures both methylsulfanyl compounds, besides yielding the same products, also gave benzimidazole formed by an independent mechanism. Transformation of these derivatives between 600 and 7508C led to formation of a complex reaction mixture indicating the radical nature of the processes. The phenyl substituted derivative was studied between 575 and 6508C and afforded benzonitrile and traces of biphenylene.