Sodium Methoxide → {2-[(7-Benzyl-1-cyano-4-hydroxy-8-oxo-7,8-dihydro-[2,7]naphthyridine-3-carbonyl)-amino]-ethoxy}-acetic acid

HRID 919764Notes

Reaction equation

CO[C:3]([C:5]1[N:6]=[C:7]([C:24]#[N:25])[C:8]2[C:9](=[O:23])[N:10]([CH2:16][C:17]3[CH:22]=[CH:21][CH:20]=[CH:19][CH:18]=3)[CH:11]=[CH:12][C:13]=2[C:14]=1[OH:15])=[O:4].[NH2:26][CH2:27][CH2:28][O:29][CH2:30][C:31]([OH:33])=[O:32].C[O-].[Na+]>CCO>[CH2:16]([N:10]1[C:9](=[O:23])[C:8]2[C:7]([C:24]#[N:25])=[N:6][C:5]([C:3]([NH:26][CH2:27][CH2:28][O:29][CH2:30][C:31]([OH:33])=[O:32])=[O:4])=[C:14]([OH:15])[C:13]=2[CH:12]=[CH:11]1)[C:17]1[CH:22]=[CH:21][CH:20]=[CH:19][CH:18]=1

Participants

Conditions

Temperature: 150 °C

Procedure

A mixture of 7-benzyl-1-cyano-4-hydroxy-8-oxo-7,8-dihydro-[2,7]naphthyridine-3-carboxylic acid methyl ester (25 mg, 0.075 mmol), (2-amino-ethoxy)-acetic acid (60 mg, 0.50 mmol), and NaOMe (20 mg, 0.37 mmol) in EtOH (5 mL) was refluxed for 16 h, then heated at 150° C. in a microwave reactor for 2 h. Solvent was evaporated in vacuo, and the residue was partitioned between EtOAc and water. 1 M HCl was added with vigorous stilling until pH about 2, and the organic layer was dried over MgSO4 and concentrated. The crude product was purified by chromatography (5-80% EtOAc/hexanes+2% AcOH) to give 4 mg of the title compound as a pale yellow solid. MS: (+) m/z 423.19 (M+1).

Workup

temperaturewas refluxed for 16 h
customSolvent was evaporated in vacuo
customthe residue was partitioned between EtOAc and water
addition1 M HCl was added with vigorous stilling until pH about 2
dry with materialthe organic layer was dried over MgSO4
concentrationconcentrated
customThe crude product was purified by chromatography (5-80% EtOAc/hexanes+2% AcOH)

Sources & evidence

ORD record: ord-4b281b3f528f44bf848445b1abbf4238
Source dataset: uspto-grants-2016_03
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09271970B2

Reaction notes

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