Benzyl Alcohol → HCID 58648572, compound

HRID 1828055Notes

Reaction equation

HRID 1828055 reaction equation
[O:1]=[C:2]([N:10]1[CH2:14][CH2:13][CH2:12][C@H:11]1[C:15]([OH:17])=[O:16])[C:3](=[O:9])[C:4]([CH3:8])([CH3:7])[CH2:5][CH3:6].[CH2:18](O)[C:19]1[CH:24]=[CH:23][CH:22]=[CH:21][CH:20]=1.C1(N=C=NC2CCCCC2)CCCCC1.C12(CS(O)(=O)=O)C(C)(C)C(CC1)CC2=O>CN(C)C1C=CN=CC=1.C(Cl)Cl>[CH3:8][C:4]([CH3:7])([CH2:5][CH3:6])[C:3](=[O:9])[C:2]([N:10]1[CH2:14][CH2:13][CH2:12][C@H:11]1[C:15]([O:17][CH2:18][C:19]1[CH:24]=[CH:23][CH:22]=[CH:21][CH:20]=1)=[O:16])=[O:1]

Participants

7

Reactant 4

HCID 244Benzyl AlcoholHCID 10868DicyclohexylcarbodiimideHCID 18462Bicyclo[2.2.1]heptane-1-methanesulfonic acid, 7,7-dimethyl-2-oxo-, (1S)-HCID 9837656Gpi-1485

Product 1

HCID 58648572HCID 58648572, compoundYield 99.1%

Reagents, catalysts & solvents 2

HCID 142844-(Dimethylamino)pyridineCatalystHCID 6344DichloromethaneSolvent

Procedure

A mixture of (2S)-1-(1,2-dioxo-3,3-dimethylpentyl)-2-pyrrolidine-carboxylic acid (500 mg; 2.07 mmol), benzyl alcohol (335 mg; 3.10 mmol), dicyclohexylcarbodiimide (683 mg; 3.31 mmol), 4-dimethylaminopyridine (84 mg; 0.69 mmol) and camphorsulphonic acid (160 mg; 0.69 mmol) in methylene chloride (30 mL) was stirred overnight under a nitrogen atmosphere. The reaction mixture was filtered through Celite to remove solids and concentrated in vacuo, and the crude material was purified on a flash column (25% ethyl acetate in hexane) to obtain 680 mg of the product as a colorless oil. 1H NMR (CDCl3; 300 MHz) δ 0.85 (t, 3H); 1.19 (s, 3H); 1.22 (s, 3H); 1.61–2.25 (m, 6H); 3.46–3.56 (m, 2H); 4.58 (dm, 1H); 5.18 (d, 2H, 7.35 (br, 5H).

Workup

  1. filtrationThe reaction mixture was filtered through Celite
  2. customto remove solids
  3. concentrationconcentrated in vacuo
  4. customthe crude material was purified on a flash column (25% ethyl acetate in hexane)

Sources & evidence

ORD record
ord-c0eb2e5503864e6ab2fc913be4c90800
Source dataset
uspto-grants-2006_06
Patent number
US07056935B2

Reaction notes

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