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Synthesis of 5H-furo[3?,2? : 6,7][1]benzopyrano[3,4-c]pyridin-5-ones and 8H-pyrano[3?,2? : 5,6]benzofuro[3,2-c]pyridin-8-ones (pyridopsoralens)

✍ Scribed by Moron, Jacqueline; Nguyen, Chi Hung; Bisagni, Emile

Book ID: 120710720
Publisher: Royal Society of Chemistry
Year: 1983
Weight: 742 KB
Volume: 0
Category: Article
ISSN: 1472-7781
DOI: 10.1039/P19830000225

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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