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Synthesis of3,4-dihydro-4-methyl-2-(quinolin-3-yl)-2H-pyrano[3,2-c]quinolines

✍ Scribed by K. Kumaraswami; P. Shanmugam

Publisher
Elsevier Science
Year
1988
Tongue
French
Weight
203 KB
Volume
29
Category
Article
ISSN
0040-4039

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✦ Synopsis

The attempted synthesis of 4-hydroxy-3-vinyl-2-quinolones(2), intended precursors for dictamnine and its derivatives(q), resulted in a cycloaddition reaction leading to a dihydropyrano[3,2-clquinoline system(d).

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## Abstract magnified image 5‐Hydrazinoquinoline and 8‐hydrazinoquinoline were converted __via__ Fischer syntheses with 3‐methyl‐butan‐2‐one into pyrido‐indolenines 2,3,3‐trimethyl‐3__H__‐pyrrolo[2,3‐__f__]quinoline **7** and 2,3,3‐trimethyl‐3__H__‐pyrrolo[3,2‐__h__]quinoline **11**, respectively.