Iodoethane → N-[4-(1-diphenylmethylpiperidin-4-yl)-butyl]-N-ethyl-3-(pyridin-3-yl)-acrylamide

HRID 1280759Notes

Reaction equation

HRID 1280759 reaction equation
[C:1]1([CH:7]([C:29]2[CH:34]=[CH:33][CH:32]=[CH:31][CH:30]=2)[N:8]2[CH2:13][CH2:12][CH:11]([CH2:14][CH2:15][CH2:16][CH2:17][NH:18][C:19](=[O:28])[CH:20]=[CH:21][C:22]3[CH:23]=[N:24][CH:25]=[CH:26][CH:27]=3)[CH2:10][CH2:9]2)[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1.[H-].[Na+].[CH2:37](I)[CH3:38].[I+].C([N+](CCCC)(CCCC)CCCC)CCC>O>[C:1]1([CH:7]([C:29]2[CH:30]=[CH:31][CH:32]=[CH:33][CH:34]=2)[N:8]2[CH2:13][CH2:12][CH:11]([CH2:14][CH2:15][CH2:16][CH2:17][N:18]([CH2:37][CH3:38])[C:19](=[O:28])[CH:20]=[CH:21][C:22]3[CH:23]=[N:24][CH:25]=[CH:26][CH:27]=3)[CH2:10][CH2:9]2)[CH:2]=[CH:3][CH:4]=[CH:5][CH:6]=1

Participants

6

Reactant 4

HCID 6340IodoethaneHCID 24758Sodium hydride2×HCID 53946994N-[4-(1-diphenylmethylpiperidin-4-yl)-butyl]-3-(pyridin-3-yl)-acrylamideHCID 178449043HCID 178449043, compound

Product 1

HCID 69893059N-[4-(1-diphenylmethylpiperidin-4-yl)-butyl]-N-ethyl-3-(pyridin-3-yl)-acrylamide

Reagents, catalysts & solvents 1

HCID 962WaterSolvent

Procedure

10 g (22.0 mmol) N-[4-(1-diphenylmethylpiperidin-4-yl)-butyl]-3-(pyridin-3-yl)-acrylamide (substance 104) are dissolved in 100 ml THE and added to 0.73 g (24.3 mmol) 80% NaH (heavy foaming) and stirred 20 minutes at RT. 2.1 ml (26.4 mmol) ethyl iodine are added dropwise and the mixture is stirred five hours at RT. 0.1 g tetrabutyl ammonium iodine are added and the batch is further stirred at RT overnight. Subsequently, 0.1 g (3 mmol) 80% NaH are added and this is heated at 50° C. for one hour under stirring. The batch is carefully hydrolyzed with 50 ml water after cooling to RT. The aqueous phase is extracted with 100 ml dichloromethane and the combined organic phases are washed with 50 ml water. The organic phase is concentrated in vacuum and the residue is chromatographically pre-purified twice over silica gel with CHCl3/CH3OH (95/5 to 90/10 and 98/2 to 95/5), subsequently further purified by flash chromatography with CHCl3/CH3OH (100/0 to 98/2) and crystallized three times from 20 ml 1-chlorobutane, 10 ml acetonitrile/diisopropyl ether (1/1) and 8 ml isopropanol/diisopropyl ether (1/1). Yellow crystals with a MP of 115-117° C. were recovered, yield. 1.1 g (10%).

Workup

  1. stirringthe mixture is stirred five hours at RT
  2. stirringthe batch is further stirred at RT overnight
  3. temperaturethis is heated at 50° C. for one hour
  4. stirringunder stirring
  5. temperatureafter cooling to RT
  6. extractionThe aqueous phase is extracted with 100 ml dichloromethane
  7. washthe combined organic phases are washed with 50 ml water
  8. concentrationThe organic phase is concentrated in vacuum
  9. customthe residue is chromatographically pre-purified twice over silica gel with CHCl3/CH3OH (95/5 to 90/10 and 98/2 to 95/5)
  10. customsubsequently further purified by flash chromatography with CHCl3/CH3OH (100/0 to 98/2)
  11. customcrystallized three times from 20 ml 1-chlorobutane, 10 ml acetonitrile/diisopropyl ether (1/1) and 8 ml isopropanol/diisopropyl ether (1/1)
  12. customYellow crystals with a MP of 115-117° C. were recovered
  13. customyield

Sources & evidence

ORD record
ord-d31c3f75f7c34af4859aae82e161f15b
Source dataset
uspto-grants-2002_09
Patent number
US06451816B1

Reaction notes

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