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In the present review the published data on the nomenclature, structure, and synthesis qr 2, 3-dihydroimidazo[1,2-a] [36][37][38][39][40][41][42], while 3-oxoimidazo[l,2-a]pyridines are used as starting materials in the synthesis of N-(2-pyridyl)-c~-amino acids and their esters [43].Several reviews [44-47] on imidazo[1,2-a]pyridines have also described their 2,3-dihydro derivatives. However, both the methods and the properties of these compounds have been covered inadequately. The present review is devoted to the nomenclature, structure, and methods of synthesis of 2,3-dihydroimidazo[l,2-a]pyridines A and their salts B. Compounds containing oxo group at positions 2 and 3 are also included.

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