4-Hydroxymethylpyridine → 7-(4-Pyridylmethoxy)-3,4-dihydroquinazolin-4-one

HRID 1384558Notes

Reaction equation

[H-].[Na+].[OH:3][CH2:4][C:5]1[CH:10]=[CH:9][N:8]=[CH:7][CH:6]=1.F[C:12]1[CH:21]=[C:20]2[C:15]([C:16](=[O:22])[NH:17][CH:18]=[N:19]2)=[CH:14][CH:13]=1>C1COCC1>[N:8]1[CH:9]=[CH:10][C:5]([CH2:4][O:3][C:12]2[CH:21]=[C:20]3[C:15]([C:16](=[O:22])[NH:17][CH:18]=[N:19]3)=[CH:14][CH:13]=2)=[CH:6][CH:7]=1

Participants

Conditions

Temperature: 120 °C

Procedure

Sodium hydride (0.72 g of a 60% suspension in mineral oil, 18 mmol) was added to a solution of 4-hydroxymethylpyridine (4 g, 36 mmol) in THF (30 ml) and the mixture heated at reflux for 15 minutes. 7-Fluoro-3,4-dihydroquinazolin-4-one (1 g, 6 mmol), (J. Chem. Soc. section B 1967, 449), was added, the THF was removed by evaporation, and the mixture was heated at 120° C. for 30 minutes. The mixture was allowed to cool, diluted with water (40 ml) and was adjusted to pH8 with concentrated hydrochloric acid. The resulting precipitate was collected by filtration, washed with water, then ether and dried under vacuum to give 7-(4-pyridylmethoxy)-3,4-dihydroquinazolin-4-one (1.12 g, 71%). 1H NMR Spectrum (DMSOd6) 5.35(s, 2H); 7.15-7.22(m, 2H); 7.5(d, 2H); 8.05(d, 1H); 8.07 (s, 1H); 8.6(d, 2H).

Workup

temperaturethe mixture heated
temperatureat reflux for 15 minutes
customthe THF was removed by evaporation
temperatureto cool
additiondiluted with water (40 ml)
filtrationThe resulting precipitate was collected by filtration
washwashed with water
dry with materialether and dried under vacuum

Sources & evidence

ORD record: ord-cd40e26788b643039ed487c997e68a95
Source dataset: uspto-grants-2001_07
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US06258951B1

Reaction notes

Loading…