Acetic Acid → TERT-BUTYL 4-(INDOLIN-1-YL)PIPERIDINE-1-CARBOXYLATE

HRID 1791907Notes

Reaction equation

HRID 1791907 reaction equation
[C:1]([O:5][C:6]([N:8]1[CH2:13][CH2:12][C:11](=O)[CH2:10][CH2:9]1)=[O:7])([CH3:4])([CH3:3])[CH3:2].[NH:15]1[C:23]2[C:18](=[CH:19][CH:20]=[CH:21][CH:22]=2)[CH2:17][CH2:16]1.C(O)(=O)C.C(O[BH-](OC(=O)C)OC(=O)C)(=O)C.[Na+]>ClCCCl.O>[C:1]([O:5][C:6]([N:8]1[CH2:13][CH2:12][CH:11]([N:15]2[C:23]3[C:18](=[CH:19][CH:20]=[CH:21][CH:22]=3)[CH2:17][CH2:16]2)[CH2:10][CH2:9]1)=[O:7])([CH3:4])([CH3:3])[CH3:2]

Participants

7

Reactant 4

HCID 176Acetic AcidHCID 10328IndolineHCID 735900tert-Butyl 4-oxopiperidine-1-carboxylateHCID 5049666Sodium triacetoxyborohydride

Product 1

HCID 11449513TERT-BUTYL 4-(INDOLIN-1-YL)PIPERIDINE-1-CARBOXYLATEYield 74.3%

Reagents, catalysts & solvents 2

HCID 111,2-DichloroethaneSolventHCID 962WaterSolvent

Procedure

1-tert-Butoxycarbonylpiperidin-4-one (2.50 g), indoline (1.50 g) and acetic acid (0.73 mL) were dissolved in 1,2-dichloroethane (75 mL), and sodium triacetoxyborohydride (5.32 g) was added thereto. The mixture was stirred at room temperature for 12 hr. The reaction mixture was added to iced water and the mixture was extracted with chloroform. The extract was dried and the solvent was evaporated under reduced pressure. The residue was purified by silica gel chromatography to give 1-tert-butoxycarbonyl-4-(1-indolinyl)piperidine (2.82 g).

Workup

  1. extractionthe mixture was extracted with chloroform
  2. customThe extract was dried
  3. customthe solvent was evaporated under reduced pressure
  4. customThe residue was purified by silica gel chromatography

Sources & evidence

ORD record
ord-e85e41b6af834b57955dea0a08467d75
Source dataset
uspto-grants-2006_07
Patent number
US07074794B2

Reaction notes

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