Triethylamine → 4-(1-Benzyl-6-fluoro-2-oxo-1,2,3,4-tetrahydro-quinazolin-5-yl)-piperazine-1-carboxylic acid tert-butyl ester

HRID 459804Notes

Reaction equation

[C:1]([O:5][C:6]([N:8]1[CH2:13][CH2:12][N:11]([C:14]2[C:19]([F:20])=[CH:18][CH:17]=[C:16]([NH:21][CH2:22][C:23]3[CH:28]=[CH:27][CH:26]=[CH:25][CH:24]=3)[C:15]=2[CH2:29][NH2:30])[CH2:10][CH2:9]1)=[O:7])([CH3:4])([CH3:3])[CH3:2].C(N(CC)CC)C.Cl[C:39](Cl)([O:41]C(=O)OC(Cl)(Cl)Cl)Cl>ClCCl>[C:1]([O:5][C:6]([N:8]1[CH2:9][CH2:10][N:11]([C:14]2[C:19]([F:20])=[CH:18][CH:17]=[C:16]3[C:15]=2[CH2:29][NH:30][C:39](=[O:41])[N:21]3[CH2:22][C:23]2[CH:28]=[CH:27][CH:26]=[CH:25][CH:24]=2)[CH2:12][CH2:13]1)=[O:7])([CH3:4])([CH3:2])[CH3:3]

Participants

Conditions

Temperature: 0 °C

Procedure

The crude 4-(2-aminomethyl-3-benzylamino-6-fluoro-phenyl)-piperazine-1-carboxylic acid tert-butyl ester of step 3 was dissolved in 10 mL dichloromethane and cooled to 0° C. Triethylamine (293 μL, 3 eq., 2.1 mmol) and 69 mg (1 eq., 0.233 mmol) triphosgene were added. The reaction mixture was stirred for 10 minutes. The mixture partitioned between ethyl acetate and water, dried over magnesium sulfate and concentrated. Column chromatography, eluting with acetone/dichlorometane provided 141 mg of 4-(1-benzyl-6-fluoro-2-oxo-1,2,3,4-tetrahydro-quinazolin-5-yl)-piperazine-1-carboxylic acid tert-butyl ester.

Workup

customThe mixture partitioned between ethyl acetate and water
dry with materialdried over magnesium sulfate
concentrationconcentrated
washColumn chromatography, eluting with acetone/dichlorometane

Sources & evidence

ORD record: ord-9da3c57122dc40a7ae1c740dafc98e8c
Source dataset: uspto-grants-2007_03
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07196087B2

Reaction notes

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