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Structures of 2-(5-amino-1,3,4-thiadiazol-2-yl)benzenesulphonamide (I), C8H8N4O2S2, and 2-(5-amino-1,3,4-thiadiazol-2-yl)-N-methylbenzenesulphonamide (II), C9H10N4O2S2

✍ Scribed by Foresti, E. ;Riva di Sanseverino, L. ;Sabatino, P.

Book ID: 114502710
Publisher: International Union of Crystallography
Year: 1985
Tongue: English
Weight: 394 KB
Volume: 41
Category: Article
ISSN: 0108-2701
DOI: 10.1107/s010827018500347x

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## Abstract An efficient two‐step synthesis of novel 3‐(5‐amino‐[1,3,4]thiadiazol‐2‐yl)‐2__H__‐pyrano[2,3‐__c__]pyridine‐2‐ones was developed. In the first step, a new 2__H__‐pyrano[2,3‐__c__]pyridine‐3‐carboxamide **5** was prepared by Knoevenagel condensation of pyridoxal hydrochloride with cyano