Triethylamine → HCID 12907207, compound
Reaction equation
[C:1]([C:3]1[C:8]([C:9]#[N:10])=[N:7][C:6](O)=[C:5]([C:12]2[CH:17]=[CH:16][CH:15]=[C:14]([Cl:18])[CH:13]=2)[N:4]=1)#[N:2].P(Cl)(Cl)([Cl:21])=O.C(N(CC)CC)C>>[C:1]([C:3]1[C:8]([C:9]#[N:10])=[N:7][C:6]([Cl:21])=[C:5]([C:12]2[CH:17]=[CH:16][CH:15]=[C:14]([Cl:18])[CH:13]=2)[N:4]=1)#[N:2]Participants
4
Procedure
2,3-Dicyano-5-hydroxy-6-(m-chlorophenyl)pyrazine (25.67 g; 0.10 mole) was put into 46.2 g (0.30 mole) of phosphorus oxychloride. The mixture was cooled to 0° to 5° C., and with stirring 10.1 g (0.1 mole) of triethylamine was added dropwise over the period of 30 minutes. After the addition, the mixture was refluxed for 3 hours. The reaction mixture was worked up in the same way as in Example 3. Petroleum ether (50 ml) was added to the resulting oily product, and the precipitate was collected by filtration. Recrystallization from carbon tetrachloride afforded 23.1 g (yield 83%) of 2,3-dicyano-5-chloro-6-(m-chlorophenyl)pyrazine.