Water → 5-(2,5-Dimethoxybenzylamino)-6-diphenylmethyl-1-azabicyclo-[2.2.2]octane-3-carboxamide

HRID 1458898Notes

Reaction equation

HRID 1458898 reaction equation
C[N:2](C)[C:3]([CH:5]1[CH:10]2[CH2:11][CH2:12][N:7]([CH:8]([CH:14]([C:21]3[CH:26]=[CH:25][CH:24]=[CH:23][CH:22]=3)[C:15]3[CH:20]=[CH:19][CH:18]=[CH:17][CH:16]=3)[C:9]2=O)[CH2:6]1)=[O:4].[CH3:28][O:29][C:30]1[CH:37]=[CH:36][C:35]([O:38][CH3:39])=[CH:34][C:31]=1[CH2:32][NH2:33].O.C(O[BH-](OC(=O)C)OC(=O)C)(=O)C.[Na+]>C1(C)C=CC=CC=1.C(O)(=O)C>[CH3:28][O:29][C:30]1[CH:37]=[CH:36][C:35]([O:38][CH3:39])=[CH:34][C:31]=1[CH2:32][NH:33][CH:9]1[CH:8]([CH:14]([C:21]2[CH:22]=[CH:23][CH:24]=[CH:25][CH:26]=2)[C:15]2[CH:20]=[CH:19][CH:18]=[CH:17][CH:16]=2)[N:7]2[CH2:12][CH2:11][CH:10]1[CH:5]([C:3]([NH2:2])=[O:4])[CH2:6]2

Participants

7

Reactant 4

HCID 962WaterHCID 186522,5-DimethoxybenzenemethanamineHCID 5049666Sodium triacetoxyborohydrideHCID 22097572N,N-Dimethyl-6-diphenylmethyl-5-oxo-1-azabicyclo[2.2.2]-octane-3-carboxamide

Product 1

HCID 197015325-(2,5-Dimethoxybenzylamino)-6-diphenylmethyl-1-azabicyclo-[2.2.2]octane-3-carboxamideYield 19%

Reagents, catalysts & solvents 2

HCID 176Acetic AcidSolventHCID 1140TolueneSolvent

Procedure

A mixture of 48 (1.2 g, 3 mmol), 2,5-dimethoxybenzyl amine (0.6 g, 3.3 mmol) camphor sulfonic acid (45 mg) in toluene (15 ml) was heated at reflux with removal of water for 3 hours and then the solvent was removed. The residue was dissolved in small amount of THF (3 ml) and this solution was added to a solution of sodium triacetoxyborohydride (1.7 g, 8 mmol) in acetic acid (40 ml) at room temperature. The mixture was stirred at room temperature for 3 hours and the solvent was removed. Water was added and the mixture was neutralized with NaHCO3 and extracted with EtOAc three times. The combined extracts were dried over Na2SO4 and concentrated. Recrystallization from MeOH/acetone to give by-product. The mother liquor was concentrated and the residue was purified by recrystallization from MeOH/EtOAc to give 50 (0.27 g, 0.56 mmol, 19%)

Workup

  1. temperaturewas heated
  2. customthe solvent was removed
  3. dissolutionThe residue was dissolved in small amount of THF (3 ml)
  4. customthe solvent was removed
  5. additionWater was added
  6. extractionextracted with EtOAc three times
  7. dry with materialThe combined extracts were dried over Na2SO4
  8. concentrationconcentrated
  9. customRecrystallization from MeOH/acetone
  10. customto give by-product
  11. concentrationThe mother liquor was concentrated
  12. customthe residue was purified by recrystallization from MeOH/EtOAc

Sources & evidence

ORD record
ord-562fa990bcdc4a8e8c98106cdd4c336c
Source dataset
uspto-grants-1998_12
Patent number
US05852038

Reaction notes

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