Ethanol → 3-Benzyloxy-5-bromo-1-(2,2-dimethoxyethyl)-4-oxo-1,4-dihydropyridine-2-carboxylic acid 3-chlorobenzylamide

HRID 1349474Notes

Reaction equation

[Cl:1][C:2]1[CH:3]=[C:4]([CH:25]=[CH:26][CH:27]=1)[CH2:5][NH:6][C:7]([C:9]1O[CH:11]=[C:12]([Br:24])[C:13](=[O:23])[C:14]=1[O:15][CH2:16][C:17]1[CH:22]=[CH:21][CH:20]=[CH:19][CH:18]=1)=[O:8].C(O)C.[CH3:31][O:32][CH:33]([O:36][CH3:37])[CH2:34][NH2:35]>O1CCCC1>[Cl:1][C:2]1[CH:3]=[C:4]([CH:25]=[CH:26][CH:27]=1)[CH2:5][NH:6][C:7]([C:9]1[N:35]([CH2:34][CH:33]([O:36][CH3:37])[O:32][CH3:31])[CH:11]=[C:12]([Br:24])[C:13](=[O:23])[C:14]=1[O:15][CH2:16][C:17]1[CH:18]=[CH:19][CH:20]=[CH:21][CH:22]=1)=[O:8]

Participants

Conditions

Temperature: 60 °C

Procedure

To a solution of 3-benzyloxy-5-bromo-4-oxo-4H-pyran-2-carboxylic acid 3-chlorobenzylamide (1.50 g) in tetrahydrofuran (10 ml)-ethanol (10 ml) was added aminoacetaldehyde dimethyl acetal (0.73 ml) and the mixture was stirred at 60° C. for 1 hr. The solvent was evaporated and the residue was purified by silica gel column chromatography (ethyl acetate:hexane=1:3–1:2) to give 3-benzyloxy-5-bromo-1-(2,2-dimethoxyethyl)-4-oxo-1,4-dihydropyridine-2-carboxylic acid 3-chlorobenzylamide (1.35 g).

Workup

customThe solvent was evaporated
customthe residue was purified by silica gel column chromatography (ethyl acetate:hexane=1:3–1:2)

Sources & evidence

ORD record: ord-b55b4b3ce26146ed803e5c1f822833b6
Source dataset: uspto-grants-2007_05
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07211572B2

Reaction notes

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