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A one-pot synthesis of 3,3′-methylenebis(2-arylamino-4H-chromen-4-one) from C-(4-oxo-4H-1-benzopyran-3-yl)-N-arylnitrone

✍ Scribed by Sourav Maiti; Suman Kalyan Panja; Chandrakanta Bandyopadhyay

Publisher
Elsevier Science
Year
2009
Tongue
French
Weight
225 KB
Volume
50
Category
Article
ISSN
0040-4039

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✦ Synopsis

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 formaldehyde. Compound 3 (R 2 = alkyl) was found to be less reactive than the N-aryl analogues towards the deformylative Mannich-type reaction.

📜 SIMILAR VOLUMES

A one-pot synthesis of the 1-benzopyrano
A one-pot synthesis of the 1-benzopyrano[2,3-b]pyridine moiety from 2-(alkyl/arylamino)-4-oxo-4H-1-benzopyran-3-carbaldehyde
✍ Sourav Maiti; Suman Kalyan Panja; Chandrakanta Bandyopadhyay 📂 Article 📅 2010 🏛 Journal of Heterocyclic Chemistry 🌐 English ⚖ 402 KB

## Abstract magnified image 2‐(Alkyl/arylamino)chromone‐3‐carbaldehyde reacts with Meldrum's acid, hippuric acid, 4‐hydroxycoumarin, diethyl malonate, ethyl acetoacetate, or ethyl benzoylacetate to produce 1‐benzopyrano[2,3‐__b__]pyridine‐2,5‐dione moiety, but ethyl cyanoacetate and malononitrile r

Reactions of 2-Amino-4H-1-benzopyran-4-o
Reactions of 2-Amino-4H-1-benzopyran-4-one with 4-Oxo-4H-1-benzopyran-3-carbaldehydes.
✍ Tarun Ghosh; Chandrakanta Bandyopadhyay 📂 Article 📅 2007 🏛 John Wiley and Sons ⚖ 25 KB 👁 1 views

## Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.

Reactions of 2-amino-4h-1-benzopyran-4-o
Reactions of 2-amino-4h-1-benzopyran-4-one with 4-oxo-4h-1-benzopyran-3-carbaldehydes
✍ Tarun Ghosh; Chandrakanta Bandyopadhyay 📂 Article 📅 2006 🏛 Journal of Heterocyclic Chemistry 🌐 English ⚖ 267 KB 👁 1 views

## Abstract magnified image The title aldehyde **1** reacts smoothly with the enamine moiety of **2**‐aminochromone **2** to produce hitherto unreported 3‐(2‐hydroxybenzoyl)‐5__H__‐1‐benzopyrano[2,3‐__b__]pyridin‐5‐one (azaxanthone) **5**. This reaction has been extended for the synthesis of bisaz