4-Amino-1-Boc-piperidine → HCID 67195753, compound

HRID 547896Notes

Reaction equation

HRID 547896 reaction equation
Br[C:2]1[CH:3]=[CH:4][C:5]([N:8]2[CH2:13][CH2:12][O:11][CH2:10][CH2:9]2)=[N:6][CH:7]=1.[C:14]([O:18][C:19]([N:21]1[CH2:26][CH2:25][CH:24]([NH2:27])[CH2:23][CH2:22]1)=[O:20])([CH3:17])([CH3:16])[CH3:15].O(C(C)(C)C)[K].C1(P(C2CCCCC2)C2C=CC=CC=2C2C(C(C)C)=CC(C(C)C)=CC=2C(C)C)CCCCC1>C1(C)C=CC=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.[Pd].[Pd]>[C:14]([O:18][C:19]([N:21]1[CH2:26][CH2:25][CH:24]([NH:27][C:2]2[CH:7]=[N:6][C:5]([N:8]3[CH2:13][CH2:12][O:11][CH2:10][CH2:9]3)=[CH:4][CH:3]=2)[CH2:23][CH2:22]1)=[O:20])([CH3:17])([CH3:15])[CH3:16]

Participants

7

Reactant 4

HCID 12682914-Amino-1-Boc-piperidineHCID 109667244-(5-bromopyridin-2-yl)morpholineHCID 111557942-Dicyclohexylphosphino-2',4',6'-triisoprophylbiphenyl2×HCID 178418922HCID 178418922, compound

Product 1

HCID 67195753HCID 67195753, compoundYield 24%

Reagents, catalysts & solvents 2

HCID 9811564Bis(dibenzylideneacetone)palladiumCatalystHCID 1140TolueneSolvent

Conditions

Temperature
100 °C

Procedure

To a degassed solution of 4-(5-bromo-pyridin-2-yl)-morpholine (4.47 g, 18.39 mmol, 1.0 equiv; commercially available) and 4-amino-piperidine-1-carboxylic acid tert-butyl ester (4.42 g, 22.07 mmol, 1.2 equiv; commercially available) in toluene (40 mL) was added KOtert-Bu (5.16 g, 46.00 mmol, 2.5 equiv), dicyclohexyl-(2′,4′,6′-triisopropyl-biphenyl-2-yl)-phosphane (0.18 g, 0.37 mmol, 0.02 equiv; X-Phos ligand [CAS RN 564483-18-7]; commercially available from Strem Chemicals, USA) and tris(dibenzylideneacetone)dipalladium(0) (1.52 g, 1.47 mmol, 0.08 equiv). The reaction mixture was stirred under nitrogen at 100° C. for 16 h, cooled to rt, filtered and the filtrate concentrated by evaporation under reduced pressure. The crude material was purified with silica column chromatography eluting with dichloromethane/methanol (20:1+0.5% triethylamine) to provide 1.60 g (24%) of the title compound in 90% purity according to 1H NMR. 1H NMR (400 MHz, CH3OD): δ 1.20-1.37 (m, 2H), 1.46 (s, 9H), 1.95 (dd, J=13.0 Hz, J=2.7 Hz, 2H), 2.94 (br s, 2H), 3.21-3.28 (m, 4H), 3.32-3.41 (m, 1H), 3.73-3.84 (m, 4H), 4.01 (d, J=13.4 Hz, 2H), 6.74 (d, J=9.0 Hz, 1H), 7.12 (dd, J=9.0 Hz, J=2.9 Hz, 1H), 7.68 (d, J=2.7 Hz, 1H). MS (ISP): 363.3 [M+H]+.

Workup

  1. temperaturecooled to rt
  2. filtrationfiltered
  3. concentrationthe filtrate concentrated by evaporation under reduced pressure
  4. customThe crude material was purified with silica column chromatography
  5. washeluting with dichloromethane/methanol (20:1+0.5% triethylamine)

Sources & evidence

ORD record
ord-4db17a2b60ca45a6afdcb755f31b04d8
Source dataset
uspto-grants-2011_05
Patent number
US07939661B2

Reaction notes

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