Sodium triacetoxyborohydride → Tert-butyl 4-{2-[4-(1-methyl-6-oxo-1,6-dihydro-[4,4']bipyrimidinyl-2-yloxy)piperidin-1-yl]ethyl}piperidine-1-carboxylate

HRID 1468783

Reaction equation

HRID 1468783 reaction equation
[CH3:1][N:2]1[C:7](=[O:8])[CH:6]=[C:5]([C:9]2[CH:14]=[CH:13][N:12]=[CH:11][N:10]=2)[N:4]=[C:3]1[O:15][CH:16]1[CH2:21][CH2:20][NH:19][CH2:18][CH2:17]1.O=[CH:23][CH2:24][CH:25]1[CH2:30][CH2:29][N:28]([C:31]([O:33][C:34]([CH3:37])([CH3:36])[CH3:35])=[O:32])[CH2:27][CH2:26]1.C(O[BH-](OC(=O)C)OC(=O)C)(=O)C.[Na+]>C(O)(=O)C.ClCCCl>[CH3:1][N:2]1[C:7](=[O:8])[CH:6]=[C:5]([C:9]2[CH:14]=[CH:13][N:12]=[CH:11][N:10]=2)[N:4]=[C:3]1[O:15][CH:16]1[CH2:21][CH2:20][N:19]([CH2:23][CH2:24][CH:25]2[CH2:26][CH2:27][N:28]([C:31]([O:33][C:34]([CH3:35])([CH3:37])[CH3:36])=[O:32])[CH2:29][CH2:30]2)[CH2:18][CH2:17]1

Participants

6

Reactant 3

HCID 5049666Sodium triacetoxyborohydrideHCID 10353694tert-Butyl 4-(2-oxoethyl)piperidine-1-carboxylateHCID 679776501-methyl-2-(piperidin-4-yloxy)-1H-[4,4']bipyrimidinyl-6-one

Product 1

HCID 68160052Tert-butyl 4-{2-[4-(1-methyl-6-oxo-1,6-dihydro-[4,4']bipyrimidinyl-2-yloxy)piperidin-1-yl]ethyl}piperidine-1-carboxylateYield 67%

Reagents, catalysts & solvents 2

HCID 176Acetic AcidCatalystHCID 111,2-DichloroethaneSolvent

Procedure

To a mixture of 1-methyl-2-(piperidin-4-yloxy)-1H-[4,4′]bipyrimidinyl-6-one (290 mg, 1.0 mmol), tert-butyl 4-(2-oxo-ethyl)piperidine-1-carboxylate (300 mg 1.3 mmol) and acetic acid (one drop) in 1,2-dichloroethane (5.0 ml) was added sodium triacetoxyborohydride (530 mg, 2.5 mmol). The mixture was stirred at room temperature overnight. The mixture was partitioned between water and dichloromethane. The organic layer was washed with brine, dried over sodium sulfate, and concentrated in vacuo. The residue was purified by NH-silica gel column chromatography (eluent; hexane/ethyl acetate=30/70) to afford tert-butyl 4-{2-[4-(1-methyl-6-oxo-1,6-dihydro-[4,4′]bipyrimidinyl-2-yloxy)piperidin-1-yl]ethyl}piperidine-1-carboxylate as a colorless solid (340 mg, 0.67 mmol, 67%).

Workup

  1. customThe mixture was partitioned between water and dichloromethane
  2. washThe organic layer was washed with brine
  3. dry with materialdried over sodium sulfate
  4. concentrationconcentrated in vacuo
  5. customThe residue was purified by NH-silica gel column chromatography (eluent; hexane/ethyl acetate=30/70)

Sources & evidence

ORD record
ord-d8ab29b0c53b4e918a83262e1607bd49
Source dataset
uspto-grants-2015_04
Patent number
US09006232B2

Linked notes

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