87833-88-3Relevant academic research and scientific papers
A Simple Ring-expansion of 1,4-Benzothiazines to give 1,5-Benzothiazepines
Maki, Yoshifumi,Sako, Magoichi,Mitsumori, Naomichi,Maeda, Sadayuki,Takaya, Masahiro
, p. 450 - 451 (1983)
A new ring-expansion of 2-phenylmethylene-2H-1,4-benzothiazin-3(4H)-ones (1) to give 2,3-dihydro-3-oxo-2-phenyl-1,5-benzothiazepin-4(5H)-ones (3) has been developed; an episulphonium ion intermediate could be involved.
