The synthesis and some reactions OF 3-(2-aminophenyl)-2-iminothiazolidines. Ring closure of n-(2-thiocyanaoethyl,)-nphenylenediamines; thiazolidine vs. 3,1,6-benzothiadiazocine formation

Article abstract of DOI:10.1016/S0040-4020(01)89768-4

When treated with strong acids, the N-(2-thiocyanatoethyl)-n-phenylenediamines (1g-1y) are cyclized exclusively to 3-(2-aninophen- yl)-2-iminothiazolidines (6) while the related tertiary amines (1a-1f) gave, under the same conditions, benzothiadiazocines