Aromatization with dearylation on Hantzsch cyclocondensation of 4-(dimethylamino)benzaldehyde, cyclohexane-1,3-diones, and some 1,3-[N,C]dinucleophiles
作者:I. B. Dzvinchuk、N. A. Tolmachova、A. N. Chernega、M. O. Lozinskii
DOI:10.1007/s10593-009-0250-6
日期:2009.2
three-component cyclization of 4-(dimethylamino)benzaldehyde, cyclohexane-1,3-diones, and some 1,3-[N,C]-dinucleophiles (5-amino-3-methyl-1-phenylpyrazole, 3,5-dimethoxyaniline, and 4-amino-1,3-dimethylpyrimidine-2,6-dione) proceeds in boiling acetic acid with the splitting off N,N-dimethylaniline and the formation of polycondensed heterocyclic sytems with a γ-unsubstituted pyridine ring (pyrazolo[3,4-b]quinoline
4-(二甲基氨基)苯甲醛,环己烷-1,3-二酮和一些1,3- [N,C]-二亲核试剂(5-氨基-3-甲基-1-苯基吡唑,3, 5-二甲氧基苯胺和4-氨基-1,3-二甲基嘧啶-2,6-二酮)在沸腾的乙酸中进行分解,分离出N,N-二甲基苯胺,并形成带有γ-未取代的吡啶环的缩合杂环系统(吡唑并[3,4- b ]喹啉,a啶和嘧啶并[4,5- b ]喹啉)。