Synthesis and Reactions of Several New 2-Thiazolin-4-Onyl Hydrazidoyl Halides

Synthesis and tautomerism of aryl- and hetaryl-azo derivatives of bi- and tri-heterocycles

“…In another report, it was indicated that reaction of 2-aminothiophenol 195 with the hydrazonoyl bromide 1A, B afforded no arylazobenzothiazine; instead it yielded the tricyclic compound 198 as the sole product (Scheme 65) [90].…”