m-Chloroperbenzoic acid → HCID 178502003, compound

Reaction equation

[NH2:1][C:2]1[N:7]=[C:6]([NH:8][C:9]([O:11][CH3:12])=[O:10])[CH:5]=[C:4]([O:13][S:14]([C:17]2[CH:22]=[CH:21][C:20]([CH3:23])=[CH:19][CH:18]=2)(=[O:16])=[O:15])[N:3]=1.ClC1C=CC=C(C(OO)=[O:32])C=1>C(Cl)Cl.CO>[NH2:1][C:2]1[N+:7]([O-:32])=[C:6]([NH:8][C:9]([O:11][CH3:12])=[O:10])[CH:5]=[C:4]([O:13][S:14]([C:17]2[CH:22]=[CH:21][C:20]([CH3:23])=[CH:19][CH:18]=2)(=[O:16])=[O:15])[N:3]=1

Participants

Procedure

350 g of methyl 2-amino-6-[(p-tolylsulfonyl)oxy]-4-pyrimidinecarbamate are suspended in 6.3 l of methylene chloride and 1 l of methanol. At room temperature there are added thereto 370 g of m-chloroperbenzoic acid and the mixture is stirred for a further 16 hours. The yellowish solution is subsequently extracted with 3 l of 2N soda solution. The aqueous phase is extracted with 1 l of methylene chloride. The combined organic phases are washed with 2 l of water and evaporated in vacuo. The crystalline residue is suspended in 1.5 l of ether while stirring. The pale yellowish crystals are filtered off under suction and washed with 0.5 l of ether. After drying at 40° in vacuo, there is obtained methyl 2-amino-6-[(p-tolylsulfonyl)oxy]-4-pyrimidinecarbamate-3-oxide.