Benzyl chloroformate → Benzyl but-3-en-1-ylcarbamate

HRID 595228Notes

Reaction equation

HRID 595228 reaction equation
Cl[C:2]([O:4][CH2:5][C:6]1[CH:11]=[CH:10][CH:9]=[CH:8][CH:7]=1)=[O:3].[CH2:12]([NH2:16])[CH2:13][CH:14]=[CH2:15].C(=O)(O)[O-].[Na+]>C(Cl)Cl.O>[CH2:12]([NH:16][C:2](=[O:3])[O:4][CH2:5][C:6]1[CH:11]=[CH:10][CH:9]=[CH:8][CH:7]=1)[CH2:13][CH:14]=[CH2:15]

Participants

6

Reactant 3

HCID 10387Benzyl chloroformateHCID 4437323-Buten-1-amineHCID 516892Sodium Bicarbonate

Product 1

HCID 14688338Benzyl but-3-en-1-ylcarbamate

Reagents, catalysts & solvents 2

HCID 962WaterSolvent2×HCID 6344DichloromethaneSolvent

Procedure

Benzyl chloroformate (38 g, 0.22 mol) was added at 0° C. over 15 minutes to a mixture of but-3-en-1-amine (10 g, 0.14 mol) and sodium bicarbonate (35 g, 0.52 mol) in DCM (500 mL) and water (40 mL). The mixture was diluted with water and extracted with DCM. The organic layer was dried over anhydrous sodium sulfate, filtered, and concentrated under reduced pressure. The residue was purified by silica gel column chromatography (petroleum ether/EtOAc) to afford benzyl but-3-en-1-ylcarbamate. MS ESI calc'd. for C12H16NO2 [M+H]+ 206. found 206. 1H NMR (400 MHz, CDCl3) δ 7.36-7.30 (m, 5H), 5.80-5.70 (m, 1H), 5.11-5.01 (m, 4H), 3.79-3.25 (m, 2H), 2.29-2.24 (m, 2H).

Workup

  1. extractionextracted with DCM
  2. dry with materialThe organic layer was dried over anhydrous sodium sulfate
  3. filtrationfiltered
  4. concentrationconcentrated under reduced pressure
  5. customThe residue was purified by silica gel column chromatography (petroleum ether/EtOAc)

Sources & evidence

ORD record
ord-5042bb1e9a8e480c97a726d774621ea3
Source dataset
uspto-grants-2016_01
Patent number
US09242984B2

Reaction notes

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