The synthesis and some reactions OF 3-(2-aminophenyl)-2-iminothiazolidines. ring closure of -(2-thiocyanaoethyl,)-phenylenediamines; thiazolidine . 3,1,6-benzothiadiazocine formation
When treated with strong acids, the N-(2-thiocyanatoethyl)-o-phenylenediamines (1g-1v) are cyclized exclusively to 3-(2-aninophen- yl)-2-iminothiazolidines (6) while the related tertiary amines (1a-1f) gave, under the same conditions, benzothiadiazocines of types (2) or (3). Some of the type (6) compounds are highly active antidepressants of low toxicity. Thermal reactions of compound (6b) and its