Ammonia → Elpetrigine
Reaction equation
[NH2:1][C:2]1[C:7]([C:8]2[CH:13]=[C:12]([Cl:14])[CH:11]=[C:10]([Cl:15])[C:9]=2[Cl:16])=[N:6][CH:5]=[C:4](Cl)[N:3]=1.[NH3:18]>C(O)C>[NH2:1][C:2]1[C:7]([C:8]2[CH:13]=[C:12]([Cl:14])[CH:11]=[C:10]([Cl:15])[C:9]=2[Cl:16])=[N:6][CH:5]=[C:4]([NH2:18])[N:3]=1Participants
4
Reactant 2
Product 1
Reagents, catalysts & solvents 1
Conditions
- Temperature
- 180 °C
Procedure
A suspension of 2-amino-6-chloro-3-(2,3,5-trichlorophenyl)pyrazine (0.3 g, 9.71×10−4 mole) in absolute ethanol (4 ml) and 0.880 aqueous ammonia (8.24 ml) was stirred and heated in an autoclave at 180° C. for 44 hrs. The cooled mixture was evaporated in vacuo, and the residue extracted with chloroform (3×30 ml). The combined chloroform extracts were dried over anhydrous magnesium sulphate, filtered and the filtrate evaporated down in vacuo. The residue was purified by ‘flash chromatography’ using chloroform to 98:2 chloroform:methanol as the eluent. The product was triturated with 40-60° C. petroleum ether, filtered and dried in vacuo. Yield 0.155 g (56%), M.p. 178-180° C.