Synthesis of substituted pyrimido[4,5-<i>b</i>] and [5,4-<i>c</i>]-[1,8]naphthyridines
作者:Christophe Plisson、Jacques Chenault
DOI:10.1002/jhet.5570380225
日期:2001.3
1-ethyl-7-methyl-4-oxo-1,4-dihydro[1,8]naphthyridine-3-carboxylate (1), precursor of nalidixic acid, has been converted in two steps through ([1,8]naphthyridin-3-yl)carbonylguanidine derivatives into substituted pyrimido[4,5-b] and [5,4-c][1,8]naphthyridines.
萘啶酸的前体1-乙基-7-甲基-4-羰基-1,4-二氢[1,8]萘啶-3-羧酸乙酯(1)已通过([1,8]萘啶-3-基)羰基胍衍生物合成取代的嘧啶[4,5- b ]和[5,4- c ] [1,8]萘啶。