| abstract |
NEW MATERIAL:A pyridylazo compound of formula I (R is halogen-substituted pyridine ring). n EXAMPLE: 2-[2-(3,5-dibromopyridyl)azol]-5-dimethylaminobenzoic acid. n USE: Analytical reagent. Sensitive color reaction with V, Mn, Fe, Co, Ni, Cu, Zn, Ga, Pd, and U. n PROCESS: A halogeno-2-aminopyridine of formula II is diazotized with isoamyl nitrite in ethanol or ether, and the diazo compound thus obtained is coupled with m- dimethylaminobenzoic acid with ice cooling to obtain the compound I. n COPYRIGHT: (C)1979,JPO&Japio |