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Eco-friendly HClO4–SiO2 catalyzed synthesis of mono- and bis-diaryl-2h-1,4 benzothiazines

✍ Scribed by Mohd. Imran Ansari; Ravi Shankar; Mohd. Kamil Hussain; Ruchir Kant; Prakash R. Maulik; K. Ravi Kumar; K. Hajela

Publisher
Journal of Heterocyclic Chemistry
Year
2011
Tongue
English
Weight
266 KB
Volume
48
Category
Article
ISSN
0022-152X

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✦ Synopsis

Abstract

Mono‐ and bis‐diaryl‐2H‐1,4‐benzothiazines were obtained in quantitative yields through silica‐supported perchloric acid catalyzed reaction cascade of double condensation and 1,4 addition of diaroylacetylenes with 2‐aminothiophenol at room temperature. The structures were confirmed by spectroscopic analyses and X‐ray crystallographic studies. J. Heterocyclic Chem., (2011)

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