Hydrochloric Acid → N-[6-(2-Benzyloxy-ethylamino)-7-nitro-2,4-dioxo-1,4-dihydro-2H-quinazolin-3-yl]-methanesulfonamide

HRID 2069202Notes

Reaction equation

F[C:2]1[CH:3]=[C:4]2[C:9](=[CH:10][C:11]=1[N+:12]([O-:14])=[O:13])[NH:8][C:7](=[O:15])[N:6]([NH:16][S:17]([CH3:20])(=[O:19])=[O:18])[C:5]2=[O:21].[CH2:22]([O:29][CH2:30][CH2:31][NH2:32])[C:23]1[CH:28]=[CH:27][CH:26]=[CH:25][CH:24]=1.Cl>C(O)C>[CH2:22]([O:29][CH2:30][CH2:31][NH:32][C:2]1[CH:3]=[C:4]2[C:9](=[CH:10][C:11]=1[N+:12]([O-:14])=[O:13])[NH:8][C:7](=[O:15])[N:6]([NH:16][S:17]([CH3:20])(=[O:19])=[O:18])[C:5]2=[O:21])[C:23]1[CH:28]=[CH:27][CH:26]=[CH:25][CH:24]=1

Participants

Conditions

Temperature: 120 °C

Procedure

A mixture of 318 mg (1 mmol) of N-(6-fluoro-7-nitro-2,4-dioxo-1,4-dihydro-2H-quinazolin-3-yl)-methanesulfonamide, 605 mg (4.0 mmol) of 2-benzyloxy-ethylamine and 3.2 ml of ethanol is heated at 120° C. in a closed vial in a microwave reactor for 10 minutes. After cooling to room temperature, 1M aqueous hydrochloric acid is added until a pH value of ˜3 is reached. The resulting mixture is extracted with ethyl acetate. The organic phase is separated, washed with water and brine, dried over magnesium sulfate and evaporated. Chromatography of the residue on silica with dichloro-methane-methanol (93:7) and crystallization from tetrahydrofuran-hexane gives 261 mg (58%) of the title compound as red crystals, m.p. 204° C. (decomp.).

Workup

temperatureAfter cooling to room temperature
extractionThe resulting mixture is extracted with ethyl acetate
customThe organic phase is separated
washwashed with water and brine
dry with materialdried over magnesium sulfate
customevaporated
customChromatography of the residue on silica with dichloro-methane-methanol (93:7) and crystallization from tetrahydrofuran-hexane

Sources & evidence

ORD record: ord-b81c41d409554f45af7d71a3e70330f8
Source dataset: uspto-grants-2012_10
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08299085B2

Reaction notes

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