Hydrochloric Acid → Benzyl 3-(2-aminocyclohexyl)-3-hydroxyazetidine-1-carboxylate

HRID 605737Notes

Reaction equation

HRID 605737 reaction equation
[OH:1][C:2]1([CH:16]2[CH2:21][CH2:20][CH2:19][CH2:18][C:17]2=O)[CH2:5][N:4]([C:6]([O:8][CH2:9][C:10]2[CH:15]=[CH:14][CH:13]=[CH:12][CH:11]=2)=[O:7])[CH2:3]1.C([O-])(=O)C.[NH4+].C([BH3-])#[N:29].[Na+].Cl>CO>[CH2:9]([O:8][C:6]([N:4]1[CH2:5][C:2]([CH:16]2[CH2:21][CH2:20][CH2:19][CH2:18][CH:17]2[NH2:29])([OH:1])[CH2:3]1)=[O:7])[C:10]1[CH:15]=[CH:14][CH:13]=[CH:12][CH:11]=1

Participants

6

Reactant 4

HCID 313Hydrochloric AcidHCID 517165Ammonium AcetateHCID 5003444Sodium cyanoborohydrideHCID 67051703Benzyl 3-hydroxy-3-(2-oxocyclohexyl)azetidine-1-carboxylate

Product 1

HCID 67051790Benzyl 3-(2-aminocyclohexyl)-3-hydroxyazetidine-1-carboxylateYield 73%

Reagents, catalysts & solvents 1

HCID 887MethanolSolvent

Procedure

A solution of benzyl 3-hydroxy-3-(2-oxocyclohexyl)azetidine-1-carboxylate (100 mg, 330 mmol) in methanol (1.60 mL) in the presence of ammonium acetate (191 mg, 2.48 mmol was cooled to 0° C. for 1 hour. Sodium cyanoborohydride (81.5 mg, 1.30 mmol) was added and the mixture was stirred at room temperature for 16 hours. To the reaction mixture was added 6 N hydrogen chloride (800 μL) and extracted with ethyl acetate. The aqueous layer was basified with aqueous sodium bicarbonate (pH 9) and extracted with dichloromethane. The combined organic portion was dried over anhydrous sodium sulfate, filtered and concentrated in vacuo to afford benzyl-3-(2-aminocyclohexyl)-3-hydroxyazetidine-1-carboxylate (73.7 mg, 73%). MS (EI) for C17H24N2O3: 305 (MH+).

Workup

  1. extractionextracted with ethyl acetate
  2. extractionextracted with dichloromethane
  3. dry with materialThe combined organic portion was dried over anhydrous sodium sulfate
  4. filtrationfiltered
  5. concentrationconcentrated in vacuo

Sources & evidence

ORD record
ord-e684ad73dc534c43b516621a56e1f44e
Source dataset
uspto-grants-2011_03
Patent number
US07915250B2

Reaction notes

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