3, 1-Benzoxazin-4-ones, 3, 1-benzothiazin-4-ones and N-arylcyanothioformamides

T Besson, K Emayan, CW Rees

Index: Besson, Thierry; Emayan, Kumaraswamy; Rees, Charles W. Journal of the Chemical Society, Chemical Communications, 1995 , # 14 p. 1419 - 1420

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Citation Number: 14

Abstract

Anthranilic acid and 4, 5-dichloro-1, 2, 3-dithiazolium chloride 1 give the delicate dithiazoloimino carboxylic acid 8 which on mild thermolysis gives 2-cyano-3, 1-benzoxazin- 4-one 6 and with triphenylphosphine gives 2-cyano-3, 1-benzothiazin-4-one 7, both quantitatively; in general N-aryliminodithiazoles 2 with triphenylphosphine give the corresponding cyanothioformanilides 3, providing a route to these compounds from ...