Synthesis of novel 2-aminoimidazo[4,5-<i>b</i>]pyridines, including the thieno analogue of the cooked-food mutagen IFP
作者:Malin Björk、Spiros Grivas
DOI:10.1002/jhet.5570430116
日期:2006.1
compounds, including three new ring systems obtained via the Friedländer condensation of ortho-aminothiophenecarbaldehydes 11, 21 and 24 with creatinine (8), are reported. The condensation afforded 1, which is the thieno analogue of the cooked-food mutagen IFP (2-amino-1,6-dimethylfuro[2,3-e]imidazo[4,5-b]pyridine), and the benzothieno[2,3-e]- and benzothieno[3,2-e]imidazo[4,5-b]pyridines 2 and 3. Attempts
报道了八种新化合物,包括通过邻氨基噻吩甲醛11、21和24与肌酸酐的弗里德兰德缩合反应制得的三个新的环系(8)。缩合得到1,它是煮熟的诱变剂IFP(2-氨基-1,6-二甲基呋喃[2,3- e ]咪唑[4,5- b ]吡啶)和苯并噻吩并[2]的噻吩类似物。,3- e ]-和苯并噻吩并[3,2- e ]咪唑并[4,5- b ]吡啶2和3。尝试用异肌酐(12)缩合11。3的脱硫得到已知的熟食致癌物PhIP。据报道3的2-硝基(4)和2-羟基(5)衍生物。相关的2-氨基-1-甲基咪唑并[4,5- b]苯并噻吩(25)是通过不同的途径合成的。报告了所有新化合物的完全分配的1 H和13 C nmr数据。