REACTION OF 2-ACYLPHENYLSELENOCYANATES WITH HYDROXYLAMINE AND PHENYLHYDRAZINE

Article abstract of DOI:10.1016/S0040-4020(01)91862-9

2-Selenocyanatobenzophenone reacts with hydroxylamine to give 3-phenyl-1,2-benzisoselenazole N-oxide, the structure of which is indicated by polarographic reduction studies.The corresponding methyl and ethyl ketones react similarly but 3-methyl-2-selenocyanato acetophenone yields 4,8-dimethyl-2-imino-2H-1,3-benzoselenazine 3-oxide.Benzoselenopheno<3,2-b>indole is formed under mild conditions by action of phenylhydrazine on 2-selenocyanatoacetophenone. 12H-Quinoxalino<2,3-b><1,4>benzoselenazine is obtained by condensation of 2,3-dichloroquinoxaline with the Zn salt of 2-aminobenzeneselenol.