Acetylacetone → Pyrazolo(1,5-a)pyrimidine, 5,7-dimethyl-

HRID 838846Notes

Reaction equation

HRID 838846 reaction equation
[NH2:1][C:2]1[CH:6]=[CH:5][NH:4][N:3]=1.NC1C(C(OCC)=O)=CNN=1.[CH3:18][C:19](=O)[CH2:20][C:21](=O)[CH3:22]>>[CH3:18][C:19]1[CH:20]=[C:21]([CH3:22])[N:3]2[N:4]=[CH:5][CH:6]=[C:2]2[N:1]=1

Participants

4

Reactant 3

HCID 31261AcetylacetoneHCID 178418806HCID 178418806, compoundHCID 178469928HCID 178469928, compound

Product 1

HCID 215186Pyrazolo(1,5-a)pyrimidine, 5,7-dimethyl-

Procedure

The procedure for preparation of the 5,7-dialkyl compounds of this invention follows generally that reported by Y. Makisumi, Chem. Pharm. Bull. (Tokyo) 10, 612 (1962) wherein 3-aminopyrazole or 3-amino-4-carbethoxypyrazole is condensed with pentane-2,4-dione to provide 5,7-dimethylpyrazolo[1,5-a]pyrimidine or the 3-carbethoxy derivative.

Sources & evidence

ORD record
ord-d0a3e44afa7a499db3dd00e031c37323
Source dataset
uspto-grants-1978_06
Patent number
US04093617

Reaction notes

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