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2-Arylhydrazono-3-oxopropanals in heterocyclic synthesis: Synthesis of arylazopyrazole, arylazoisoxazole and dialkylpyridazine-5,6-dicarboxylate derivatives. New one-step synthesis of arylazopyrimidines

✍ Scribed by Mariam A. Al-Shiekh; Abdellatif M. Salah El-Din; Ebtisam A. Hafez; Mohamed H. Elnagdi

Publisher
Journal of Heterocyclic Chemistry
Year
2004
Tongue
English
Weight
397 KB
Volume
41
Category
Article
ISSN
0022-152X

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✦ Synopsis

Abstract

A novel synthesis of arylpyrazole, isoxazole, dialkyl 1,6‐dihydropyridazine 5,6‐dicarboxylate derivatives and a new one‐step synthesis of azolopyrimidines under microwave‐assisted conditions are reported.

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Enaminones in heterocyclic synthesis: A
Enaminones in heterocyclic synthesis: A new regioselective synthesis of 2,3,6-trisubstituted pyridines, 6-substituted-3-aroylpyridines and 1,3,5-triaroylbenzenes
✍ Balkis Al-Saleh; Mervat Mohammed Abdelkhalik; Afaf Mohammed Eltoukhy; Mohammed H 📂 Article 📅 2002 🏛 Journal of Heterocyclic Chemistry 🌐 English ⚖ 49 KB

## Abstract 1‐Substituted‐3‐dimethylaminopropenones **1a‐d** reacted with acetylacetone and with ethyl acetoacetate to yield regioselectively 2,3,6‐trisubstituted pyridines. Refluxing **1a‐d** in acetic acid/ammonium acetate resulted in the formation of 6‐substituted‐3‐aroylpyridines, whereas reflu