De. Stepanov et al., New derivatives of 4,5,6,7-tetrahydrobenzothiazol-7-one and 5,6,7,8-tetrahydro-4H-thiazolo[5,4-c]azepin-8-one, RUSS J G CH, 70(5), 2000, pp. 784-787
Reactions of 2-amino-5,6,7,8-tetrahydro-4H-thiazolo[5,4-c]azepin-8-ones and
2-amino-4,5,6,7-tetrahydrobenzothiazol-7-ones with butyl nitrite and coppe
r(I) chloride yield 2-chloro derivatives which readily react with various a
mines to form substitution products.