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

HRID 348175Notes

Reaction equation

HRID 348175 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.Cl.[NH2:26][CH2:27][C:28]1[CH:33]=[CH:32][C:31]([F:34])=[CH:30][C:29]=1[N:35]1[CH2:38][CH2:37][C:36]1=[O:39].F[P-](F)(F)(F)(F)F.N1(O[P+](N(C)C)(N(C)C)N(C)C)C2C=CC=CC=2N=N1.C(N(C(C)C)CC)(C)C>CC#N.CN(C)C=O>[F:34][C:31]1[CH:32]=[CH:33][C:28]([CH2:27][NH:26][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([CH3:20])[CH3:21])=[O:23])=[C:29]([N:35]2[CH2:38][CH2:37][C:36]2=[O:39])[CH:30]=1

Participants

7

Reactant 4

HCID 81531DiisopropylethylamineHCID 151348Benzotriazol-1-yloxy-tris(dimethylamino)phosphonium hexafluorophosphateHCID 210697571-(2-(Aminomethyl)-5-fluorophenyl)azetidin-2-one hydrochlorideHCID 210698583-(Benzyloxy)-9,9-dimethyl-4-oxo-4,6,7,9-tetrahydropyrimido[2,1-c][1,4]oxazine-2-carboxylic acid

Product 1

HCID 21070002N-(4-Fluoro-2-(2-oxoazetidin-1-yl)benzyl)-3-(benzyloxy)-9,9-dimethyl-4-oxo-4,6,7,9-tetrahydropyrimido[2,1-c][1,4]oxazine-2-carboxamideYield 72.1%

Reagents, catalysts & solvents 2

HCID 6228DimethylformamideSolventHCID 6342AcetonitrileSolvent

Conditions

Temperature
23 °C

Procedure

To a solution of intermediate 27, 3-(benzyloxy)-9,9-dimethyl-4-oxo-4,6,7,9-tetrahydropyrimido[2,1-c][1,4]oxazine-2-carboxylic acid, (0.142 g, 0.430 mmol) in CH3CN: dimethylformamide (30 mL: 5 mL) was added intermediate 120, 1-(2-(aminomethyl)-5-fluorophenyl)azetidin-2-one hydrochloride, (0.100 g, 0.43 mmol), (benzotriazole-1-yloxy)tris(dimethylamino)phosphonium hexafluorophosphate (0.207 g, 0.470 mmol) and diisopropylethylamine (280 μL, 1.72 mmol). The reaction mixture was stirred at 23° C. for 18 h. The solvents were removed in vacuo and 1N HCl (50 mL) added. This was extracted with ethyl acetate (2×50 mL). The combined organic extracts were dried (MgSO4), filtered and concentrated in vacuo. The residue was purified on a Biotage system using a silica gel column with ethyl acetate as eluent to afford the title compound (0.157 g, 72% yield). 1H NMR (400 MHz, MeOD) δ ppm: 7.88 (1H, d, J=8.3 Hz), 7.76 (1H, d, J=8.0 Hz), 7.58–7.30 (4H, m), 7.10 (1H, dd, J=10.2, 2.5 Hz), 6.90 (1H, m), 5.20 (2H, s), 4.55 (2H, s), 4.04 (2H, m), 3.96 (2H, m), 3.78 (2H, t, J=4.2 Hz), 3.10 (2H, t, J=4.2 Hz), 1.58 (6H, s); LCMS (M+H)+ m/z 506.

Workup

  1. customThe solvents were removed in vacuo and 1N HCl (50 mL)
  2. additionadded
  3. extractionThis was extracted with ethyl acetate (2×50 mL)
  4. dry with materialThe combined organic extracts were dried (MgSO4)
  5. filtrationfiltered
  6. concentrationconcentrated in vacuo
  7. customThe residue was purified on a Biotage system

Sources & evidence

ORD record
ord-66fbb93edacd46709c7e4cfc10dd6914
Source dataset
uspto-grants-2007_02
Patent number
US07176196B2

Reaction notes

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