Nitric Acid → HCID 178460811, compound
Reaction equation
[CH2:1]([S:4][C:5]1[N:10]=[C:9]([OH:11])[CH:8]=[C:7]([OH:12])[N:6]=1)[CH2:2][CH3:3].[N+:13]([O-])([OH:15])=[O:14]>>[N+:13]([C:8]1[C:7]([OH:12])=[N:6][C:5]([S:4][CH2:1][CH2:2][CH3:3])=[N:10][C:9]=1[OH:11])([O-:15])=[O:14]Participants
Procedure
According to U.S. Pat. No. 5,747,496, the 4,6-dichloro-5-nitro-2-(propylthio)pyrimidine of formula II is prepared by adding propyl iodide to a suspension of 4,6-dihydroxy-2-mercaptopyrimidine in water containing sodium hydroxide; the reaction mixture is stirred for 2 weeks and then the reaction mass is concentrated to half volume; followed by the addition of hydrochloric acid and isolating the product by filtration to produce 2-propylthio-pyrimidine-4,6-diol. The 2-propylthio-pyrimidine-4,6-diol is then reacted with excess fuming nitric acid to produce 5-nitro-2-propylthiopyrimidine-4,6-diol. The 5-nitro-2-propylthiopyrimidine-4,6-diol is reacted with phosphoryl chloride in the presence of N,N-dimethylaniline at reflux to produce a reaction mass. The cooled reaction mass is poured onto ice followed by extracting with diethyl ether to afford a solution; then the combined extracts are dried and concentrated. The residue is chromatographed (SiO2, light petrol) to produce 4,6-dichloro-5-nitro-2-(propylthio)pyrimidine.
Sources & evidence
- ORD record
- ord-04abbfefe5974b7a94968838e0852bcf
- Source dataset
- uspto-grants-2014_10
- Patent number
- US08859769B2
Reaction notes
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