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A CONVENIENT SYNTHESIS OF 8,9,10,11-TETRAHYDRODIBENZO|b,h|[1,6]NAPHTHYRIDIN-6(5H)ONES

✍ Scribed by Prakash, G. Arul; Rajendran, S. P.

Book ID
121015547
Publisher
Walter de Gruyter GmbH & Co. KG
Year
2001
Tongue
English
Weight
679 KB
Volume
7
Category
Article
ISSN
0793-0283

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## Abstract Vilsmeier formylation of the 4‐amino‐2‐pyridinones 4a–d leads to the formation of the corresponding 3‐carbaldehydes 5a–d (the diformylated product 8 is isolated as a by‐product). A cyclizing Knoevenagel reaction of 5 with CH‐acidic nitriles 6 in the presence of piperidine gives substitu