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Convenient selective synthesis of 5,7,8,9-tetrahydro-4H,6H-chromeno[2,3-d][1,3]oxazin-4-ones

✍ Scribed by Yu. M. Litvinov; A. M. Shestopalov

Book ID
106521487
Publisher
Springer
Year
2009
Tongue
English
Weight
232 KB
Volume
58
Category
Article
ISSN
1573-9171

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## Abstract Reaction of 5‐amino‐3‐methyl‐1‐phenylpyrazole (1a) and 5‐amino‐3‐(4‐chlorophenyl)‐1__H__‐pyrazole (1b) with dimedone (2) and __p__‐susbstituted benzaldehydes 3 in ethanol, afforded in all cases tricyclic linear 4‐aryl‐7,7‐dimethyl‐4,7,8,9‐tetrahydro‐6__H__‐pyrazolo[3,4‐__b__]quinolin‐5‐