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Paper | Regular issue | Vol 31, No. 2, 1990, pp.259-265
Published online, 1st January, 1970
DOI: 10.3987/COM-89-5148
New Tricyclic Compounds : Pyrdio[2’,3’:4,5]- and Pyrdio[3’,2’:4,5]imidazo[1,2-a]pyrimidines

Denis Descours and Didier Festal*

*LIPHA, centre de recherche, BP 8481, 69359 Lyon Cedex 08, France

Abstract

1,2,3,4-Tetrahydropyrido[2’,3’:4,5]imidazo[1,2-a]pyrimidin-2-ones 1 are synthesized from 3-amino-2-benzylaminopyridines by condensation with N-(3-chloropropanoyl)carbonimidic dichloride and subsequent cyclisation. 1,2,3,4-Tetrahydropyrido[2’,3’:4,5]imidazo[1,2-a]pyrimidin-2-ones 2 are prepared from methyl N-(3-amino-2-pyridyl)-3-aminopropanoates by condensation with N-acetylcarbonimidic dichloride, hydrolysis and cyclisation. Alkylation of pyridoimidazo[1,2-a]pyrimidin-2-ones 1 or 2 gives the corresponding 1-alkyl derivatives.