Synthesis of pyrrolo[2,1-c][1,4]benzothiazines by annellation of 3-alkoxycarbonylmethylene-4H-1,4-benzothiazines (β-enamine esters) with dimethyl acetylenedicarboxylate
- 1 January 1987
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Perkin Transactions 1
- No. 5,p. 1027-1031
- https://doi.org/10.1039/p19870001027
Abstract
The annellation of the benzothiazines (1a–c) with DMAD affords the corresponding pyrrolo[2,1-c][1,4]benzothiazines (5a–c) rather than pyrido[2,1-c][1,4]benzothiazines. Such structural assignments are based on spectroscopic and X-ray evidenceThis publication has 2 references indexed in Scilit:
- Thermal Reactions of 1,4-Benzoxazine Derivtives IIHETEROCYCLES, 1985
- Reaction between 2,2′-dithiodianiline and activated alkynes. Synthesis of 4H-1,4-benzothiazinesJournal of the Chemical Society, Perkin Transactions 1, 1983