Trifluoroacetic acid → 6-bromo-1-isopropyl-1H-imidazo[4,5-c]pyridine

反応式

[Br:1][C:2]1[N:7]=[CH:6][C:5]([NH2:8])=[C:4]([NH:9][CH:10]([CH3:12])[CH3:11])[CH:3]=1.[CH2:13](OC(OCC)OCC)C.C(O)(C(F)(F)F)=O>>[Br:1][C:2]1[N:7]=[CH:6][C:5]2[N:8]=[CH:13][N:9]([CH:10]([CH3:12])[CH3:11])[C:4]=2[CH:3]=1

参加物

反応物 3

HCID 6422Trifluoroacetic acid

HCID 31214Ethyl orthoformate

HCID 901766496-bromo-N4-isopropylpyridine-3,4-diamine2 回

生成物 1

HCID 901777606-bromo-1-isopropyl-1H-imidazo[4,5-c]pyridine

反応条件

温度: 125 °C

実験手順

A mixture of 6-bromo-N4-isopropylpyridine-3,4-diamine (intermediate 257, 1.2 g, 5.22 mmol), triethylorthoformate (26.6 ml, 156 mmol) and TFA (0.24 ml, 3.12 mmol) was heated at 125° C. for 3.5 h and then concentrated. The residue was diluted with sat. aq. NaHCO3 and extracted with