Crystal hydrates LnCl 3· 6H 2 O and Ln (NO 3) 3· 6H 2 O as catalysts in the synthesis of 2, 3, 5-trialkylpyridines by reaction of ammonia with aliphatic aldehydes

…, SP Kuleshov, AR Makhmutov, UM Dzhemilev

Index: Bulgakov; Kuleshov; Makhmutov; Dzhemilev Russian Journal of Organic Chemistry, 2007 , vol. 43, # 9 p. 1417 - 1418

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Citation Number: 3

Abstract

Systems based on Zr, Fe, Cr, Co, Ni, Pd, and Mg complexes and Et3Al are efficient catalysts in the synthesis of alkyl-substituted pyridines [1]. Disadvantages of these systems include high reaction temperature (180–200 C) and pressure and the use of flammable and explosive Et3Al. By contrast, trifluoromethanesulfonate lanthanide complexes Ln (OTf) 3 ensure preparation of pyridine bases at room temperature in the absence of Et3Al [2–4]. ...