Benzyl Alcohol → 4-Benzyl 1-tert-butyl piperidine-1,4-dicarboxylate

HRID 1068456Notes

Reaction equation

HRID 1068456 reaction equation
[C:1]([O:5][C:6]([N:8]1[CH2:16][CH2:15][CH:11]([C:12]([OH:14])=[O:13])[CH2:10][CH2:9]1)=[O:7])([CH3:4])([CH3:3])[CH3:2].[CH2:17](O)[C:18]1[CH:23]=[CH:22][CH:21]=[CH:20][CH:19]=1.Cl.CN(C)CCCN=C=NCC>CN(C)C1C=CN=CC=1.ClCCl>[C:1]([O:5][C:6]([N:8]1[CH2:16][CH2:15][CH:11]([C:12]([O:14][CH2:17][C:18]2[CH:23]=[CH:22][CH:21]=[CH:20][CH:19]=2)=[O:13])[CH2:10][CH2:9]1)=[O:7])([CH3:4])([CH3:2])[CH3:3]

Participants

6

Reactant 3

HCID 244Benzyl AlcoholHCID 3928711-(tert-Butoxycarbonyl)-4-piperidinecarboxylic acidHCID 27239391,3-Propanediamine, N'-(ethylcarbonimidoyl)-N,N-dimethyl-, monohydrochloride

Product 1

HCID 222559134-Benzyl 1-tert-butyl piperidine-1,4-dicarboxylate

Reagents, catalysts & solvents 2

HCID 142844-(Dimethylamino)pyridineCatalystHCID 6344DichloromethaneSolvent2×

Procedure

A mixture of N-tert-butoxycarbonylisonipecotic acid (12.0 g, 52.3 mmol), benzyl alcohol (6.0 mL, 58 mmol), 1-(3-dimethylamino-propyl)-3-ethylcarbodiimide hydrochloride (11.04 g, 57.6 mmol), and 4-dimethylaminopyridine (642 mg, 5.25 mmol) in anhydrous dichloromethane (100 mL) was stirred at room temp. for 6 h. The resultant mixture was diluted with dichloromethane and washed successively with water, 10% aqueous citric acid, saturated sodium bicarbonate, and brine. The organic extract was dried over anhydrous magnesium sulfate, filtered, and concentration under vacuum. The residual oil was subjected to column chromatography on silica eluting with 20% ethyl acetate in hexane. Collection and concentration of appropriate fractions afforded the title product as white solid.

Workup

  1. washwashed successively with water, 10% aqueous citric acid, saturated sodium bicarbonate, and brine
  2. extractionThe organic extract
  3. dry with materialwas dried over anhydrous magnesium sulfate
  4. filtrationfiltered
  5. concentrationconcentration under vacuum
  6. customCollection and concentration of appropriate fractions

Sources & evidence

ORD record
ord-62eb7d75d8a54dd7b684c9a6ecb0fb9c
Source dataset
uspto-grants-2001_06
Patent number
US06248756B1

Reaction notes

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