125217-95-0Relevant academic research and scientific papers
Synthesis of 6H,8H-Isoquinobenzothiazin-8-ones
Fodor, Lajos,Szabo, Janos,Bernath, Gabor,Sohar, Pal,MacLean, David B.,et al.
, p. 333 - 337 (2007/10/02)
6H,8H-Isoquino-1,3-benzothiazin-8-ones have been prepared by reaction of 6,7-dimethoxy-2H-1,3-benzothiazines with homophthalic anhydride and by photocyclization of 3-benzoyl-4-methylene-6,7-dimethoxy-2H-1,3-benzothiazine.The compounds are thia analogues of protoberberine alkaloids containing a sulfur atom at C-5 and a lactam function at C-8.The mass spectra of the title compounds are discussed.
