Structural Elucidation of the Hitherto 2,3-Dihydro-1,2,3,5-Benzothiatriazepine-1,1-Dioxide Ring System_1,2

Abstract

The structure of the product from the successive reaction of pyridinium 2-benzamido-5-chloro-4-methylbenzenesulfonate with PCl₅ and excess anhydrous hydrazine has been established as 8-chloro-4-phenyl-7-methyl-2,3-dihydro-1,2,3,5-benzothiatriazine-1,1-dioxide, 1. MS, IR, ¹H and ¹³C NMR have provided definite proof of 1.

Key Words:

• 8-Chloro-4-phenyl-7-methyl-2,3-dihydro-1,2,3,5-benzothiatriazine-1,1-dioxide
• Mass Spectrometry
• ¹H-NMR
• ¹³C-NMR