Reactions of 1,3-Dialkyl-5-amino-1,3-dihydro-2H-imidazo-[4,5-b]pyridin-2-ones with acetylacetone and ethyl acetoacetate
作者:N. N. Smolyar、D. A. Lomov
DOI:10.1134/s1070428009030129
日期:2009.3
1,3-Dialkyl-5-amino-1,3-dihydro-2H-imidazo[4,5-b]pyridin-2-ones reacted with acetylacetone to give the corresponding 4-(1,3-dialkyl-2-oxo-1,3-dihydro-2H-imidazo[4,5-b]pyridin-5-ylamino)pent-3-en-2-ones which underwent intramolecular cyclization to 1,3-dialkyl-5,7-dimethyl-1,3-dihydro-2H-imidazo[4,5-b]-[1,8]naphthyridin-2-ones on heating in polyphosphoric acid or diphenyl ether. Analogous reaction of
1,3-二烷基-5-氨基-1,3-二氢-2 H-咪唑并[4,5 - b ]吡啶-2-酮与乙酰丙酮反应生成相应的4-(1,3-二烷基-2- oxo-1,3-dihydro-2 H-咪唑并[4,5 - b ]吡啶-5-基氨基)戊-3-en-2-ones,它们经过分子内环化成1,3-二烷基-5,7-二甲基在多磷酸或二苯醚中加热时的-1,3-二氢-2 H-咪唑并[4,5- b ]-[1,8]萘啶-2-酮。1,3-二烷基-5-氨基-1,3-二氢-2 H-咪唑并[4,5 - b ]吡啶-2-酮与乙酰乙酸乙酯的类似反应导致3-(1,3)乙基的形成-二烷基-2-氧代-1,3-二氢-2 H-咪唑[4,5- b] pyridin-5-ylamino)but-2-enoates,其环化生成1,3-二烷基-8-羟基-7-甲基-1,3-二氢-2 H-咪唑[5,4- b ] [1,8 ]萘啶-2-酮。