Three-component condensation of 5-aminoimidazole derivatives with aldehydes and Meldrum’s acid. Synthesis of 3,4,6,7-tetrahydroimidazo[4,5-b]pyridin-5-ones
作者:B. V. Lichitsky、A. N. Komogortsev、A. A. Dudinov、M. M. Krayushkin
DOI:10.1007/s11172-012-0211-6
日期:2012.8
method for the synthesis of the earlier unknown substituted 3,4,6,7-tetrahydroimidazo[4,5-b]pyridin-5-ones was developed based on a three-component condensation of 5-aminoimidazole derivatives, aldehydes, and Meldrum’s acid. Unstable aminoimidazole derivatives were readily formed in situ by decarboxylation of 5-amino-4-imidazolecarboxylic acids in acidic medium at room temperature, whose sodium salts were
一种合成早期未知取代的 3,4,6,7-四氢咪唑并 [4,5-b]pyridin-5-ones 的简便方法是基于 5-氨基咪唑衍生物、醛和Meldrum的酸。不稳定的氨基咪唑衍生物很容易通过 5-氨基-4-咪唑羧酸在室温下在酸性介质中脱羧而原位形成,其钠盐是通过相应的易得酯的碱水解获得的。