Zinc-Induced Reduction of Ethyl 2-Cyano-3-(4-oxo-4H-1-benzopyran-3-yl)propenoates — A Medium-Dependent Reaction.
✍ Scribed by Chandrakanta Bandyopadhyay; Kumar Ranabir Sur; Ranjan Patra
- Publisher
- John Wiley and Sons
- Year
- 2003
- Weight
- 101 KB
- Volume
- 34
- Category
- Article
- ISSN
- 0931-7597
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2-(Arylamino)-4-oxo-4H-chromene-3-carbaldehyde 3 (R 2 = aryl) produces 12H-chromeno[2,3-b]quinolin-12-one 4 when treated with sarcosine, piperidine or diethylamine, but produces 3,3 0 -methylenebis(2-arylamino-4H-chromen-4-one) 8 when treated with the same amine in the presence of an excess of forma
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## Abstract magnified image One‐pot reaction of 3‐aryl‐5‐methyl‐1,3,4‐oxadiazolin‐2‐ones **1a‐g** with ethanolamine yielded the 4‐(2‐hydroxyethyl)‐2‐aryl‐5‐methyl‐2,4‐dihydro‐3__H__‐1,2,4‐triazolin‐3‐ones **2a‐g** which were converted to the azido compounds **6a‐g**. These azides on 1,3‐dipolar cy