A Simple Ring-expansion of 1,4-Benzothiazines to give 1,5-Benzothiazepines

DOI: 10.1039/c39830000450

Source and publish data:

Journal of the Chemical Society. Chemical communications p. 450 - 451 (1983)

Update date:2022-08-04

Topics: Base Halogenation Acidic Workup 1,4-Benzothiazine

Authors:

Maki, Yoshifumi

Sako, Magoichi

Mitsumori, Naomichi

Maeda, Sadayuki

Takaya, Masahiro

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Article abstract of DOI:10.1039/c39830000450

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.

Full text of DOI:10.1039/c39830000450

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