PMID: 9525089Apr 3, 1998Paper

Research on potentially bioactive aza and thiaza polycyclic compounds containing a bridgehead nitrogen atom. Synthesis and antimicrobial activity of some pyrrolo[1,2,3-de]-1,4-benzothiazines, Part 2

Archiv der Pharmazie
D ArmeniseF Morlacchi

Abstract

Acid catalyzed cyclization reactions of both 3-alkyl- and 3-aryl-substituted N-(2,2-dialkoxyethyl)-3,4-dihydro-2H-1,4-benzothiazines (2) lead to 2,3-dihydro-pyrrolo[1,2,3-de]-1,4-benzothiazines (3). The pyrrolobenzothiazine structure was deduced on the basis of 2D 1H NMR-NOESY experiments and fully determined by X-ray data. Compounds 3a-c showed poor antibacterial activity. However, the 3-phenyl-N-(2,2-dimethoxyethyl)-3,4-dihydro-2H-1,4-benzothiazine (2b') showed antifungal activity against Aspergillus niger 16-fold greater than miconazole.

Citations

Nov 8, 2011·Acta Crystallographica. Section E, Structure Reports Online·A ChitradeviS Perumal
May 18, 2018·Nature Communications·Nadine ZumbrägelHarald Gröger

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