Sodium Hydroxide → 2,7-Dichloroquinazolin-4(1H)-one

Temperature

0 °C

A 1.0 M aqueous solution of sodium hydroxide (19 mL, 19 mmol) was added to a mixture of 2,4,7-trichloroquinazoline (2.0 g, 8.5 mmol) and THF (30 mL) that had been cooled to 0° C. The reaction mixture was allowed to warm to rt and was stirred vigorously for 2 h. The mixture was concentrated to remove the THF, and the remaining aqueous phase was cooled to 0° C. and acidified by addition of 1.0 M aqueous HCl (25 mL). The resulting mixture was allowed to stand at 0° C. for 20 min, the solid was collected by filtration and dried to provide the titled compound (1.7 g, 92%). The MS and NMR data are in agreement with those that have been previously described: Journal of Medicinal Chemistry, 2007, 50, 2297-2300.

1. temperatureto warm to rt
2. concentrationThe mixture was concentrated
3. customto remove the THF
4. temperaturethe remaining aqueous phase was cooled to 0° C.
5. additionacidified by addition of 1.0 M aqueous HCl (25 mL)
6. waitto stand at 0° C. for 20 min
7. filtrationthe solid was collected by filtration
8. customdried

ORD record

ord-bfa9273320ab40aba28734151d063317

Source dataset

uspto-grants-2015_01

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US08937078B2