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37538-68-4

37538-68-4 Structure

37538-68-4 Structure
IdentificationBack Directory
[Name]

Pyrido[3,2-d]pyrimidine-2,4(1H,3H)-dione
[CAS]

37538-68-4
[Synonyms]

2,4-Dihydroxypyrido[3,2-d]pyriMidine
1H-Pyrido[3,2-d]pyrimidine-2,4-dione
1H,3H-Pyrido[3,2-d]pyriMidine-2,4-dione
Pyrido[3,2-d]pyrimidine-2,4(1H,3H)-dione
1H,2H,3H,4H-pyrido[3,2-d]pyriMidine-2,4-dione
[Molecular Formula]

C7H5N3O2
[MDL Number]

MFCD13185173
[MOL File]

37538-68-4.mol
[Molecular Weight]

163.13
Chemical PropertiesBack Directory
[Melting point ]

320 °C
[density ]

1.424±0.06 g/cm3(Predicted)
[pka]

9.27±0.20(Predicted)
Safety DataBack Directory
[Symbol(GHS) ]

GHS hazard pictograms
GHS07
[Signal word ]

Warning
[Hazard statements ]

H302-H315-H319-H332-H335
[Precautionary statements ]

P261-P280-P305+P351+P338
[HS Code ]

2933998090
Hazard InformationBack Directory
[Uses]

2,4-Dihydroxypyrido[3,2-d]pyrimidine is used as a reagent in the synthesis of diaminoquinazolines as antitubercular agents. 2,4-Dihydroxypyrido[3,2-d]pyrimidine may also be used as a potential histamine H4 receptor antagonist.
[Synthesis]

3-Amino-2-pyridinecarboxylic acid

1462-86-8

Urea

57-13-6

Pyrido[3,2-d]pyrimidine-2,4(1H,3H)-dione

37538-68-4

(1) 4 g of 3-aminopyridine-2-carboxylic acid (raw material A3) was mixed with 20 g of urea and heated and refluxed at 200°C for 5 h. After the reaction was completed, intermediate B3 was obtained in 27% yield. The reaction equation was as follows:

[References]

[1] Bioorganic and Medicinal Chemistry Letters, 2013, vol. 23, # 9, p. 2663 - 2670
[2] Patent: CN106083742, 2016, A. Location in patent: Paragraph 0185; 0186; 0187
[3] Journal of the Chemical Society, 1956, p. 1045,1053
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