Dimethylformamide → N-(4-Fluoro-2-(methylcarbamoyl)benzyl)-3-(benzyloxy)-9,9-dimethyl-4-oxo-4,6,7,9-tetrahydropyrimido[2,1-c][1,4]oxazine-2-carboxamide

HRID 348173Notes

Reaction equation

HRID 348173 reaction equation
[CH2:1]([O:8][C:9]1[C:18](=[O:19])[N:17]2[C:12]([C:13]([CH3:21])([CH3:20])[O:14][CH2:15][CH2:16]2)=[N:11][C:10]=1[C:22](O)=[O:23])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.FC(F)(F)C(O)=O.[NH2:32][CH2:33][C:34]1[CH:43]=[CH:42][C:41]([F:44])=[CH:40][C:35]=1[C:36]([NH:38][CH3:39])=[O:37].F[P-](F)(F)(F)(F)F.N1(OC(N(C)C)=[N+](C)C)C2N=CC=CC=2N=N1.CN(C)C=O>CN(C)C1C=CN=CC=1.C(OCC)(=O)C>[F:44][C:41]1[CH:42]=[CH:43][C:34]([CH2:33][NH:32][C:22]([C:10]2[N:11]=[C:12]3[N:17]([C:18](=[O:19])[C:9]=2[O:8][CH2:1][C:2]2[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=2)[CH2:16][CH2:15][O:14][C:13]3([CH3:21])[CH3:20])=[O:23])=[C:35]([C:36](=[O:37])[NH:38][CH3:39])[CH:40]=1

Participants

7

Reactant 4

HCID 6228DimethylformamideHCID 9886157Methanaminium, N-((dimethylamino)(3H-1,2,3-triazolo(4,5-b)pyridin-3-yloxy)methylene)-N-methyl-, hexafluorophosphate(1-) (1:1)HCID 21069814HCID 21069814, compoundHCID 210698583-(Benzyloxy)-9,9-dimethyl-4-oxo-4,6,7,9-tetrahydropyrimido[2,1-c][1,4]oxazine-2-carboxylic acid

Product 1

HCID 21070022N-(4-Fluoro-2-(methylcarbamoyl)benzyl)-3-(benzyloxy)-9,9-dimethyl-4-oxo-4,6,7,9-tetrahydropyrimido[2,1-c][1,4]oxazine-2-carboxamideYield 100%

Reagents, catalysts & solvents 2

HCID 142844-(Dimethylamino)pyridineCatalystHCID 8857Ethyl AcetateSolvent

Procedure

A 25 mL round-bottom flask was charged with intermediate 27, 3-(benzyloxy)-9,9-dimethyl-4-oxo-4,6,7,9-tetrahydropyrimido-[2,1-c][1,4]oxazine-2-carboxylic acid, (0.991 g, 3.0 mmol), intermediate 39, 2-(aminomethyl)-5-fluoro-N-methylbenzamide trifluoroacetic acid salt (1.185 g, 4.0 mmol), 4-dimethylaminopyridine (DMAP, 1.1 g, 9.0 mmol) and O-(7-azabenzotriazol-1-yl)-N,N,N′,N′-tetramethyluronium hexafluorophosphate (HATU, 1.722 g, 4.5 mmol). Dimethylformamide (20 mL) was added and the mixture stirred for 1 h at ambient temperature. After this, the reaction mixture was diluted with ethyl acetate (100 mL) then washed with water (3×25 mL) and brine (25 mL). The organic layer was dried (Na2SO4), filtered, concentrated and purified by flash chromatography (SiO2), eluting with hexanes/ethyl acetate (1:1 to 1:3) followed by ethyl acetate, to afford the title compound as an off-white solid (1.48 g, 100% yield). 1H NMR (500 MHz, CDCl3) δ ppm: 8.49 (1H, t, J=6.1 Hz), 7.48–7.46 (2H, m), 7.43 (1H, dd, J=8.5, 5.5 Hz), 7.31–7.27 (3H, m), 7.12 (1H, dd, J=8.9, 2.7 Hz), 7.05 (1H, td, J=8.2, 2.7 Hz), 6.52 (1H, br s), 5.26 (2H, s), 4.53 (2H, d, J=6.4 Hz), 4.01 (2H, t, J=4.9 Hz), 3.96 (2H, t, J=4.9 Hz), 2.97 (3H, d, J=4.9 Hz), 1.62 (6H, s). HRMS (M+H) calcd for C26H28FN4O5: 495.2044. found: 495.2032.

Workup

  1. washthen washed with water (3×25 mL) and brine (25 mL)
  2. dry with materialThe organic layer was dried (Na2SO4)
  3. filtrationfiltered
  4. concentrationconcentrated
  5. custompurified by flash chromatography (SiO2)
  6. washeluting with hexanes/ethyl acetate (1:1 to 1:3)

Sources & evidence

ORD record
ord-d0edce6a00dd4c1b931f34769402a83e
Source dataset
uspto-grants-2007_02
Patent number
US07176196B2

Reaction notes

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