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

HRID 901879Notes

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/dichloromethane 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/dichloromethane

Sources & evidence

ORD record: ord-5c0cd9eb1ed24a2b82e0cd4ba14154a3
Source dataset: uspto-grants-2008_04
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07365063B2

Reaction notes

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