Potassium Carbonate → tert-butyl 4-(1-(cyanomethyl)-2-oxo-7-phenyl-2,3-dihydro-1H-pyrido[2,3-b][1,4]oxazin-6-yl)benzylcarbamate

HRID 1509311Notes

Reaction equation

[O:1]=[C:2]1[CH2:7][O:6][C:5]2[N:8]=[C:9]([C:18]3[CH:32]=[CH:31][C:21]([CH2:22][NH:23][C:24](=[O:30])[O:25][C:26]([CH3:29])([CH3:28])[CH3:27])=[CH:20][CH:19]=3)[C:10]([C:12]3[CH:17]=[CH:16][CH:15]=[CH:14][CH:13]=3)=[CH:11][C:4]=2[NH:3]1.Br[CH2:34][C:35]#[N:36].C(=O)([O-])[O-].[K+].[K+]>CN(C=O)C.O>[C:35]([CH2:34][N:3]1[C:2](=[O:1])[CH2:7][O:6][C:5]2[N:8]=[C:9]([C:18]3[CH:19]=[CH:20][C:21]([CH2:22][NH:23][C:24](=[O:30])[O:25][C:26]([CH3:27])([CH3:28])[CH3:29])=[CH:31][CH:32]=3)[C:10]([C:12]3[CH:13]=[CH:14][CH:15]=[CH:16][CH:17]=3)=[CH:11][C:4]1=2)#[N:36]

Participants

Conditions

Temperature: 40 °C

Procedure

A mixture of tert-butyl 4-(2-oxo-7-phenyl-2,3-dihydro-1H-pyrido[2,3-b][1,4]oxazin-6-yl)benzylcarbamate (70 mg, 0.162 mmol), 2-bromoacetonitrile (58.4 mg, 0.487 mmol) and potassium carbonate (67.3 mg, 0.487 mmol) in DMF (2 ml) was stirred at 40° C. for 16 h. The reaction mixture was cooled and diluted with water (10 ml) and extracted with DCM (8 mlX3). The combined organic phase was concentrated and the residue was purified by column (biotage, 10 g) eluted with Ethyl acetate/cyclohexane 0-30% to give product 12 mg. 1H NMR (500 MHz, CDCl3) 7.29 (s, 1H), 7.19-7.26 (m, 5H), 7.13 (m, 2H), 7.05 (d, 2H), 4.88 (s, 2H), 4.81 (s, 2H), 4.73 (br, 1H), 4.21 (d, 2H), 1.38 (br, 9H). LCMS (Method D): RT=1.35 min, M+H+=472.2.

Workup

temperatureThe reaction mixture was cooled
extractionextracted with DCM (8 mlX3)
concentrationThe combined organic phase was concentrated
customthe residue was purified by column (biotage, 10 g)
washeluted with Ethyl acetate/cyclohexane 0-30%

Sources & evidence

ORD record: ord-8a3951c6779041729aa8d8ec349abb43
Source dataset: uspto-grants-2015_12
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09221838B2

Reaction notes

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