Benzylamine → 4-(4-Benzylamino-phenyl)-3,6-dihydro-2H-pyridine-1-carboxylic acid tert-butyl ester

HRID 1267117Notes

Reaction equation

HRID 1267117 reaction equation
[C:1]([O:5][C:6]([N:8]1[CH2:13][CH:12]=[C:11]([C:14]2[CH:19]=[CH:18][C:17](Br)=[CH:16][CH:15]=2)[CH2:10][CH2:9]1)=[O:7])([CH3:4])([CH3:3])[CH3:2].[CH2:21]([NH2:28])[C:22]1[CH:27]=[CH:26][CH:25]=[CH:24][CH:23]=1.CC(C)([O-])C.[Na+]>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].C1C=CC(P(C2C=CC3C(=CC=CC=3)C=2C2C3C(=CC=CC=3)C=CC=2P(C2C=CC=CC=2)C2C=CC=CC=2)C2C=CC=CC=2)=CC=1>[C:1]([O:5][C:6]([N:8]1[CH2:13][CH:12]=[C:11]([C:14]2[CH:19]=[CH:18][C:17]([NH:28][CH2:21][C:22]3[CH:27]=[CH:26][CH:25]=[CH:24][CH:23]=3)=[CH:16][CH:15]=2)[CH2:10][CH2:9]1)=[O:7])([CH3:4])([CH3:3])[CH3:2]

Participants

7

Reactant 3

HCID 7504BenzylamineHCID 23676156Sodium t-butoxideHCID 54371851Tert-butyl 4-(4-bromophenyl)-3,6-dihydropyridine-1(2h)-carboxylate

Product 1

HCID 537487374-(4-Benzylamino-phenyl)-3,6-dihydro-2H-pyridine-1-carboxylic acid tert-butyl esterYield 73.7%

Reagents, catalysts & solvents 3

HCID 634876Binap, (A+-)-CatalystHCID 9811564Bis(dibenzylideneacetone)palladiumCatalystHCID 1140TolueneSolvent

Conditions

Temperature
80 °C

Procedure

To a solution of 4-(4-bromo-phenyl)-3,6-dihydro-2H-pyridine-1-carboxylic acid tert-butyl ester (0.34 g), benzylamine (0.12 g) and sodium tert-butoxide (0.13 g) in toluene (8 mL) were added tris(dibenzylidene acetone)dipalladium (2.2 mg) and Binap (4.6 mg) and the mixture was heated at 80° C. for 16 hours. The solution was then cooled to room temperature, filtered and the filtrate was evaporated under reduced pressure. The residue was purified by flash chromatography eluting with petroleum ether/AcOEt (90/10) and the oily residue was crystallized from diisopropyl ether to give the title compound (0.27 g) as white crystals.

Workup

  1. temperatureThe solution was then cooled to room temperature
  2. filtrationfiltered
  3. customthe filtrate was evaporated under reduced pressure
  4. customThe residue was purified by flash chromatography
  5. washeluting with petroleum ether/AcOEt (90/10)
  6. customthe oily residue was crystallized from diisopropyl ether

Sources & evidence

ORD record
ord-9c1ca8c990864d51a54fac36ad021f03
Source dataset
uspto-grants-2003_04
Patent number
US06552022B1

Reaction notes

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