ChemicalBook CAS DataBase List Methyl 5-aminopyridine-3-carboxylate

Methyl 5-aminopyridine-3-carboxylate synthesis

6synthesis methods

Product Name:Methyl 5-aminopyridine-3-carboxylate
CAS Number:36052-25-2
Molecular formula:C7H8N2O2
Molecular Weight:152.15

67-56-1

24242-19-1

36052-25-2

SOCl2 (10.4 g, 86.9 mmol) was slowly added dropwise to a stirred methanolic solution (100 mL) of 5-aminonicotinic acid (10.0 g, 72.5 mmol) at 0 °C. After gradually warming the reaction mixture to room temperature, the reaction was continued at reflux for 16 hours. After completion of the reaction, the mixture was cooled and concentrated under vacuum. The residue was diluted with deionized water (200 mL) and subsequently neutralized with aqueous NaHCO3 to pH=7. The aqueous phase mixture was extracted with dichloromethane (DCM, 100 mL x 2). The organic layers were combined, washed with saturated saline (100 mL × 2), dried over anhydrous Na2SO4, filtered, and the filtrate was concentrated to dryness under vacuum to give 9.5 g of methyl 5-aminopyridine-3-carboxylate as a white solid in 86% yield. The product was characterized by 1H NMR (DMSO-d6, 400 MHz): δ=8.24 (1H, d), 8.12 (1H, d), 7.42 (1H, dd), 5.65 (2H, brs), 3.84 (3H, s).

67-56-1 Synthesis

67-56-1
789 suppliers
$7.29/5ml-f

24242-19-1 Synthesis

24242-19-1
263 suppliers
$6.00/1g

36052-25-2
137 suppliers
$7.00/250mg

Yield: 86%

Reaction Conditions:

with thionyl chloride at 0;Reflux;

Steps:

IV-16.1
To a stirred solution of 5-amino-nicotinic acid (10.0 g, 72.5 mmol) in methanol (100 mL) was added SOCl₂ (10.4 g, 86.9 mmol) dropwise at 0°C. The mixture was allowed warm to room temperature and then refluxed for 16 hours. The mixture was cooled, concentrated in vacuum and the residue was diluted with water (200 mL). The mixture was neutralized with aqueous NaHC0₃ solution to pH = 7. The aqueous mixture was extracted with DCM (100 mL x2). The combined organic layers were washed with brine (100 mL x2), dried over anhydrous Na₂S0₄, filtered and the filtrate was concentrated in vacuum to dryness to give 9.5 g (yield: 86%) of 5-amino-nicotinic acid methyl ester as white solid. 1H NMR (DMSO-d₆, 400MHz): δ = 8.24 (1H, d), 8.12 (1H, d), 7.42 (1H, dd), 5.65 (2H, brs), 3.84 (3H, s).

References:

SANFORD-BURNHAM MEDICAL RESEARCH INSTITUTE;PINKERTON, Anthony, B.;DAHL, Russell;COSFORD, Nicholas, D.P.;MILLAN, Jose, Luis WO2013/126608, 2013, A1 Location in patent:Paragraph 00492-00493

24242-19-1 Synthesis

24242-19-1
263 suppliers
$6.00/1g

36052-25-2
137 suppliers
$7.00/250mg

References

24242-19-1 Synthesis

24242-19-1
263 suppliers
$6.00/1g