Water → HCID 73503593, compound

0.10 g (2.5 mmol) of sodium hydride was added to a suspension of 0.50 g (1.4 mmol) of 2-hydroxyiminomethyl-4-(3,4-methylenedioxybenzyl)amino-6-chloroquinazoline in 25 ml of dimethylformamide. The obtained mixture was stirred. After 30 minutes, 25 ml (2.3 mmol) of ethyl bromoacetate was dropped into the mixture. The mixture thus obtained was stirred at room temperature for several hours, followed by the addition of water. The obtained mixture was extracted with ethyl acetate. The organic layer was dried over anhydrous magnesium sulfate and filtered. The filtrate was distilled under a reducer pressure to remove the solvent. The residue was purified by silica gel column chromatography (ethyl acetate/n-hexane) to give 0.52 g of the title compound as a pale-yellow crystal.

1. customThe mixture thus obtained
2. stirringwas stirred at room temperature for several hours
3. extractionThe obtained mixture was extracted with ethyl acetate
4. dry with materialThe organic layer was dried over anhydrous magnesium sulfate
5. filtrationfiltered
6. distillationThe filtrate was distilled under a reducer pressure
7. customto remove the solvent
8. customThe residue was purified by silica gel column chromatography (ethyl acetate/n-hexane)

ORD record

ord-e3e27e5a7895479d93b34864728c8f1a

Source dataset

uspto-grants-1998_09

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US05801180