Sodium hydride → HCID 54292127, compound

HRID 1004978Notes

Reaction equation

HRID 1004978 reaction equation
[Cl:1][C:2]1[CH:7]=[CH:6][C:5]([C:8]2([OH:22])[CH2:13][CH2:12][N:11]([C:14]([O:16][C:17]([CH3:20])([CH3:19])[CH3:18])=[O:15])[CH2:10][CH:9]2[OH:21])=[CH:4][CH:3]=1.[H-].[Na+].[CH3:25][O:26][C:27]1[CH:34]=[CH:33][C:30]([CH2:31]Cl)=[CH:29][CH:28]=1>CS(C)=O>[Cl:1][C:2]1[CH:3]=[CH:4][C:5]([C:8]2([OH:22])[CH2:13][CH2:12][N:11]([C:14]([O:16][C:17]([CH3:19])([CH3:18])[CH3:20])=[O:15])[CH2:10][CH:9]2[O:21][CH2:31][C:30]2[CH:33]=[CH:34][C:27]([O:26][CH3:25])=[CH:28][CH:29]=2)=[CH:6][CH:7]=1

Participants

5

Reactant 3

HCID 24758Sodium hydrideHCID 699934-Methyloxybenzyl chlorideHCID 20812236HCID 20812236, compound

Product 1

HCID 54292127HCID 54292127, compoundYield 38%

Reagents, catalysts & solvents 1

HCID 679Dimethyl SulfoxideSolvent3×

Procedure

A solution of 128 mg (0.392 mmol) of tert-butyl (3RS,4RS)-4-(4-chlorophenyl)-3,4-dihydroxy-piperidine-1-carboxylate in 1.5 ml of dimethyl sulphoxide was added dropwise to a suspension of 16 mg (0.4 mmol) of sodium hydride (60% dispersion in refined oil) in 3 ml of dimethyl sulphoxide. After 15 minutes a solution of 61 mg (0.39 mmol) of p-methoxybenzyl chloride in 1 ml of dimethyl sulphoxide was added dropwise at room temperature within 10 minutes and the mixture was stirred for 18 hours. Subsequently, the reaction mixture was partitioned between ethyl acetate and water, the organic phase was dried over magnesium sulphate and finally the solvent was removed under reduced pressure. The crude product (200 mg) was purified by chromatography on silica gel with a 3:1 mixture of hexane and ethyl acetate as the eluent. There were obtained (in addition to starting material and bisalkylated product) 63 mg (38% of theory) of tert-butyl (3RS,4RS)-4-(4-chlorophenyl)-4-hydroxy-3-(4-methoxy-benzyloxy)-piperidine-1-carboxylate as a colourless oil; MS: 448, 450 [M+H]+.

Workup

  1. customSubsequently, the reaction mixture was partitioned between ethyl acetate and water
  2. dry with materialthe organic phase was dried over magnesium sulphate
  3. customfinally the solvent was removed under reduced pressure
  4. customThe crude product (200 mg) was purified by chromatography on silica gel with a 3:1 mixture of hexane and ethyl acetate as the eluent

Sources & evidence

ORD record
ord-c4c2d5df8c8344c8b6ee99a76f6f0080
Source dataset
uspto-grants-2000_04
Patent number
US06051712

Reaction notes

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