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Paper | Regular issue | Vol 51, No. 7, 1999, pp.1517-1525
Published online, 1st January, 1970
DOI: 10.3987/COM-98-8454
Synthesis of 1,2-Diazaphenalenes under Microwave

Yousri El Barkaoui, Noura Jorio, Souâd Fkih-Tétouani, Ahmed El Louzi, and André Loupy*

*Laboratoire des Réactions Sélectives sur Supports, C.N.R.S., UMR 8615, Université de Paris-Sud, Batiment 410, 91405 Orsay Cedex, France


1,2-Diazaphenalenes were prepared by condensation reactions of hydrazine with isophorone derivatives under various conditions: conventional heating in homogeneous solution and microwave activation either in homogeneous solution or in dry media. Microwave irradiation gave the best results with both enhancements in rates and yields. In many cases, decarboxylation of the heterocycles formed took place. When the reactions were carried out in dry media over K10 montmorillonite, dicondensation products were obtained beside the desired heterocycles.