Potassium Carbonate → Tert-butyl [2-[2-[4-(diphenylmethoxy)-1-piperidinyl]ethyl]-2,3-dihydro-2,4,6,7-tetramethylbenzofuran-5-yl]carbamate

HRID 565665Notes

Reaction equation

HRID 565665 reaction equation
Br[CH2:2][CH2:3][C:4]1([CH3:24])[CH2:8][C:7]2[C:9]([CH3:23])=[C:10]([NH:15][C:16](=[O:22])[O:17][C:18]([CH3:21])([CH3:20])[CH3:19])[C:11]([CH3:14])=[C:12]([CH3:13])[C:6]=2[O:5]1.[C:25]1([CH:31]([C:39]2[CH:44]=[CH:43][CH:42]=[CH:41][CH:40]=2)[O:32][CH:33]2[CH2:38][CH2:37][NH:36][CH2:35][CH2:34]2)[CH:30]=[CH:29][CH:28]=[CH:27][CH:26]=1.C(=O)([O-])[O-].[K+].[K+]>CN(C)C=O.O>[C:39]1([CH:31]([C:25]2[CH:26]=[CH:27][CH:28]=[CH:29][CH:30]=2)[O:32][CH:33]2[CH2:38][CH2:37][N:36]([CH2:2][CH2:3][C:4]3([CH3:24])[CH2:8][C:7]4[C:9]([CH3:23])=[C:10]([NH:15][C:16](=[O:22])[O:17][C:18]([CH3:21])([CH3:20])[CH3:19])[C:11]([CH3:14])=[C:12]([CH3:13])[C:6]=4[O:5]3)[CH2:35][CH2:34]2)[CH:40]=[CH:41][CH:42]=[CH:43][CH:44]=1

Participants

6

Reactant 3

HCID 11430Potassium CarbonateHCID 30175844-BenzhydryloxypiperidineHCID 54438432Tert-butyl [2-(2-bromoethyl)-2,3-dihydro-2,4,6,7-tetramethylbenzofuran-5-yl]carbamate

Product 1

HCID 53977860Tert-butyl [2-[2-[4-(diphenylmethoxy)-1-piperidinyl]ethyl]-2,3-dihydro-2,4,6,7-tetramethylbenzofuran-5-yl]carbamateYield 92%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 6228DimethylformamideSolvent

Conditions

Temperature
60 °C

Procedure

A suspension of tert-butyl [2-(2-bromoethyl)-2,3-dihydro-2,4,6,7-tetramethylbenzofuran-5-yl]carbamate (1.2 g), 4-(diphenylmethoxy)piperidine (0.85 g), and potassium carbonate (0.44 g) in N,N-dimethylformamide (20 mL) was stirred at 60° C. for 15 hours. This reaction mixture was diluted with water and extracted with ethyl acetate. The extract was washed with saturated aqueous NaCl, dried over MgSO4, and concentrated under reduced pressure. The residue was purified by silica gel column chromatography (ethyl acetate/methanol=98:2 to 95:5) to provide 1.6 g of the title compound. Yield 92%.

Workup

  1. extractionextracted with ethyl acetate
  2. washThe extract was washed with saturated aqueous NaCl
  3. dry with materialdried over MgSO4
  4. concentrationconcentrated under reduced pressure
  5. customThe residue was purified by silica gel column chromatography (ethyl acetate/methanol=98:2 to 95:5)

Sources & evidence

ORD record
ord-c84db3e3158b48c6994c1892346494d0
Source dataset
uspto-grants-2001_01
Patent number
US06172085B2

Reaction notes

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