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Oxatriazolium-5-thiolates

Mesoionic 1,2,3,4-oxatriazolium-5-thiolates (172) are convenient starting materials for mesoionic thiatriazole 5-oxides. Thus arylhydrazines and carbon disulfide in ethanol yield arylhydrazinium dithiocarbamate salts, which are nitrosated with sodium nitrite in aqueous hydrochloric acid to give yellow l,2,3,4-oxatriazolium-5-thiolates (172). These heterocycles are isomerized by warming with ammonium hydroxide in ethanol to give colorless crystalline l,2,3,4-thiatriazolium-5-olates (173) (Scheme 36) <76CC306>. [Pg.725]

See other pages where Oxatriazolium-5-thiolates is mentioned: [Pg.38]    [Pg.695]    [Pg.696]    [Pg.38]    [Pg.465]    [Pg.605]    [Pg.38]    [Pg.136]    [Pg.137]    [Pg.38]    [Pg.144]    [Pg.38]    [Pg.695]    [Pg.696]    [Pg.38]    [Pg.465]    [Pg.605]    [Pg.38]    [Pg.136]    [Pg.137]    [Pg.38]    [Pg.144]   
See also in sourсe #XX -- [ Pg.137 ]



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