14161-11-6, 3,4,5-Trichloropyridazine is a pyridazine compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated
PREPARATION 41 3,5-Dichloro-4-(1-methylethylamino)pyridazine A solution of 3,4,5-trichloropyridazine (9.2 g) and isopropylamine (16.5 g) in toluene (25 ml) is refluxed for 18 hr. Excess isopropylamine is removed by atmospheric distillation. The residual solution is cooled and diluted with dichloromethane and aqueous sodium hydroxide solution (5%). The phases are separated. The organic phase is washed with water and then with saline. The organic phase is dried over sodium sulfate and concentrated under reduced pressure to give a liquid which contains a mixture of isomeric products. The isomers are separated by flash chromatography on silica gel eluding with ether/hexane (30/70). The appropriate fractions are pooled and concentrated to give the desired isomer, NMR (CDCl3) 1.33, 4.59, 4.87 and 8.60delta; CMR (CDCl3) 24.2, 46.4, 117.1,139.3, 145.5 and 151.3 delta. Further elution gives 3,4-dichloro-5-(1-methylethylamino)pyridine which is recrystallized from ether hexane, NMR (CDCl3) 1.35, 3.87, 4.80, and 8.55 delta; CMR (CDCl3) 22.6, 44.7, 116.5, 136.3, 142.5 and 153.4 delta., 14161-11-6
14161-11-6 3,4,5-Trichloropyridazine 70111, apyridazine compound, is more and more widely used in various fields.
Reference£º
Patent; The Upjohn Company; US5599930; (1997); A;,
Pyridazine – Wikipedia
Pyridazine | C4H4N2 – PubChem