Water → 5-(5-Methyl-6-oxo-5,6,7,8-tetrahydro-[1,5]naphthyridin-2-yl)-nicotinic acid methyl ester

HRID 1774797Notes

Reaction equation

HRID 1774797 reaction equation
[CH3:1][O:2][C:3](=[O:21])[C:4]1[CH:9]=[C:8]([C:10]2[CH:19]=[CH:18][C:17]3[NH:16][C:15](=[O:20])[CH2:14][CH2:13][C:12]=3[N:11]=2)[CH:7]=[N:6][CH:5]=1.[H-].[Na+].[CH3:24]I.O>C1COCC1>[CH3:1][O:2][C:3](=[O:21])[C:4]1[CH:9]=[C:8]([C:10]2[CH:19]=[CH:18][C:17]3[N:16]([CH3:24])[C:15](=[O:20])[CH2:14][CH2:13][C:12]=3[N:11]=2)[CH:7]=[N:6][CH:5]=1

Participants

6

Reactant 4

HCID 962WaterHCID 6328Methyl iodideHCID 24758Sodium hydrideHCID 866791595-(6-Oxo-5,6,7,8-tetrahydro-[1,5]naphthyridin-2-yl)-nicotinic acid methyl ester

Product 1

HCID 866791615-(5-Methyl-6-oxo-5,6,7,8-tetrahydro-[1,5]naphthyridin-2-yl)-nicotinic acid methyl esterYield 85%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

To a stirred solution of 5-(6-oxo-5,6,7,8-tetrahydro-[1,5]naphthyridin-2-yl)-nicotinic acid methyl ester (430 mg, 1.52 mmol) in THF (15.0 mL) was added 60% NaH (91 mg, 2.28 mmol) at 0° C. and the reaction mixture was stirred at 2-5° C. for 0.5 h before CH3I (0.3 mL, 4.56 mmol) was added. After stirring overnight at RT, it was poured into water (5.0 mL). After extraction with EtOAc, the organic layer was washed with brine, dried over anhy. Na2SO4, filtered and concentrated in vacuo to give 5-(5-methyl-6-oxo-5,6,7,8-tetrahydro-[1,5]naphthyridin-2-yl)-nicotinic acid methyl ester (383.7 mg, 85%) as a light yellow solid. MS: 298.1 (M+H+).

Workup

  1. additionwas added
  2. extractionAfter extraction with EtOAc
  3. washthe organic layer was washed with brine
  4. customdried over anhy
  5. filtrationNa2SO4, filtered
  6. concentrationconcentrated in vacuo

Sources & evidence

ORD record
ord-48cfe1d53ebf4be9b4bcd707349b6283
Source dataset
uspto-grants-2016_02
Patent number
US09260408B2

Reaction notes

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