New efficient approach for the synthesis of 2-alkyl(aryl) substituted 4<i>H</i>-pyrido[1,2-<i>a</i>]pyrimidin-4-ones
作者:Helio G. Bonacorso、Fernando J. Righi、Isadora R. Rodrigues、Cleber A. Cechinel、Michelle B. Costa、Arci D. Wastowski、Marcos A. P. Martins、Nilo Zanatta
DOI:10.1002/jhet.5570430136
日期:2006.1
A new, efficient and easy route for the preparation of a series of 2-alkyl(aryl) substituted 4-oxo-4H-pyrido-[1,2-a]pyrimidines, where alkyl = CH3; aryl = C6H5, 4-FC6H4, 4-ClC6H4, 4-BrC6H4, 4-CH3C6H4, 4-OCH3C6H4, 4-NO2C6H4 in 45–80 % yield from the reaction of β-alkoxyvinyl trichloromethyl ketones with 2-aminopyridine under mild conditions, is then reported.
一系列2-烷基(芳基)的制备一种新的,有效的和简单的路线被取代的4-氧代-4- ħ -pyrido- [1,2一]嘧啶类,其中烷基= CH 3 ; 芳= C 6 H ^ 5,4-FC 6 H ^ 4,4-CLC 6 ħ 4,4- BRC 6 ħ 4,4-CH 3 C ^ 6 ħ 4,4-OCH 3 C ^ 6 ħ 4,4-NO 2 C 6高4 据报道,在温和的条件下,β-烷氧基乙烯基三氯甲基酮与2-氨基吡啶的反应收率为45-80%。