Triethylamine → Tert-butyl 3-{7-[2-(benzyloxy)phenyl]-2,4-dioxo-1,2,3,4-tetrahydropyrido[2,3-d]pyrimidin-5-yl}-1-piperidinecarboxylate

HRID 1767350Notes

Reaction equation

HRID 1767350 reaction equation
[NH2:1][C:2]1[C:7]([C:8](=[O:10])[NH2:9])=[C:6]([CH:11]2[CH2:16][CH2:15][CH2:14][N:13]([C:17]([O:19][C:20]([CH3:23])([CH3:22])[CH3:21])=[O:18])[CH2:12]2)[CH:5]=[C:4]([C:24]2[CH:29]=[CH:28][CH:27]=[CH:26][C:25]=2[O:30][CH2:31][C:32]2[CH:37]=[CH:36][CH:35]=[CH:34][CH:33]=2)[N:3]=1.C(N(CC)CC)C.Cl[C:46](Cl)([O:48]C(=O)OC(Cl)(Cl)Cl)Cl>C1COCC1>[CH2:31]([O:30][C:25]1[CH:26]=[CH:27][CH:28]=[CH:29][C:24]=1[C:4]1[CH:5]=[C:6]([CH:11]2[CH2:16][CH2:15][CH2:14][N:13]([C:17]([O:19][C:20]([CH3:23])([CH3:22])[CH3:21])=[O:18])[CH2:12]2)[C:7]2[C:8](=[O:10])[NH:9][C:46](=[O:48])[NH:1][C:2]=2[N:3]=1)[C:32]1[CH:33]=[CH:34][CH:35]=[CH:36][CH:37]=1

Participants

5

Reactant 3

HCID 8471TriethylamineHCID 94429TriphosgeneHCID 22258771Tert-butyl 3-{2-amino-6-[2-(benzyl-oxy)phenyl]-3-carbamoyl-4-pyridinyl}-1-piperidinecarboxylate

Product 1

HCID 22258892Tert-butyl 3-{7-[2-(benzyloxy)phenyl]-2,4-dioxo-1,2,3,4-tetrahydropyrido[2,3-d]pyrimidin-5-yl}-1-piperidinecarboxylateYield 97%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Conditions

Temperature
0 °C

Procedure

To a cooled (0° C.), stirred solution of tert-butyl 3-{2-amino-6-[2-(benzyl-oxy)phenyl]-3-carbamoyl-4-pyridinyl}-1-piperidinecarboxylate (0.400 g, 0.800 mmol), which was obtained in the step (1) of Example 7-1, in THF (10 mL) were added triethylamine (0.50 mL, 3.58 mmol) followed by triphosgene (0.354 g, 1.19 mmol). The reaction mixture was stirred at room temperature for 12 hrs. The reaction was quenched with water and extracted with ethyl acetate. The organic phase was washed with brine, dried over Na2SO4, filtered, and concentrated. The residue was purified by silica gel column chromatography (hexane/ethyl acetate=2/1–1/1) and recrystallized from ethanol to give tert-butyl 3-{7-[2-(benzyloxy)phenyl]-2,4-dioxo-1,2,3,4-tetrahydropyrido[2,3-d]pyrimidin-5-yl}-1-piperidinecarboxylate as a white solid. (0.406 g, yield; 97%)

Workup

  1. customThe reaction was quenched with water
  2. extractionextracted with ethyl acetate
  3. washThe organic phase was washed with brine
  4. dry with materialdried over Na2SO4
  5. filtrationfiltered
  6. concentrationconcentrated
  7. customThe residue was purified by silica gel column chromatography (hexane/ethyl acetate=2/1–1/1)
  8. customrecrystallized from ethanol

Sources & evidence

ORD record
ord-da17d988d941499ab152b6b4675b448a
Source dataset
uspto-grants-2007_06
Patent number
US07232909B2

Reaction notes

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