Heterocyclic Compounds
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ChemInform Abstract: Synthesis of Pyrrolo(2,1-c) (1,4)benzothiazines by Annellation of 3-Alkoxycarbonylmethylene-4H-1,4-benzothiazines (β-Enamine Esters) with Dimethyl Acetylenedicarboxylate.
First published: September 1, 1987
Abstract
The annellation of the benzothiazines (I) with the acetylene (II) proceeds via the Michael adducts (III) to give the pyrrolobenzothiazines (IV); both the latter can be converted to the pyrrolobenzothiazines (V).
ChemInform Abstract
The annellation of the benzothiazines (I) with the acetylene (II) proceeds via the Michael adducts (III) to give the pyrrolobenzothiazines (IV); both the latter can be converted to the pyrrolobenzothiazines (V). The X-ray structure of (IVa) (space group P1, Z=2) is reported.
