tert-Butyl 4-(hydroxymethyl)phenethylcarbamate → tert-Butyl [2-(4-formylphenyl)ethyl]carbamate

HRID 1582250Notes

Reaction equation

HRID 1582250 reaction equation
[C:1]([O:5][C:6](=[O:18])[NH:7][CH2:8][CH2:9][C:10]1[CH:15]=[CH:14][C:13]([CH2:16][OH:17])=[CH:12][CH:11]=1)([CH3:4])([CH3:3])[CH3:2]>C(Cl)Cl.O=[Mn]=O>[C:1]([O:5][C:6](=[O:18])[NH:7][CH2:8][CH2:9][C:10]1[CH:15]=[CH:14][C:13]([CH:16]=[O:17])=[CH:12][CH:11]=1)([CH3:4])([CH3:2])[CH3:3]

Participants

4

Reactant 1

HCID 22337080tert-Butyl 4-(hydroxymethyl)phenethylcarbamate

Product 1

HCID 17796625tert-Butyl [2-(4-formylphenyl)ethyl]carbamateYield 88%

Reagents, catalysts & solvents 2

HCID 14801Manganese dioxideCatalystHCID 6344DichloromethaneSolvent

Procedure

To a solution of the alcohol from above (200 mg, 0.796 mmol) in CH2Cl2 (8 mL) was added activated MnO2 (814 mg, 7.96 mmol) and the mixture stirred at room temperature for 69 h. The reaction mixture was filtered through Celite and the cake was washed with CH2Cl2. The solvent was removed from the filtrate under reduced pressure to give the desired aldehyde as colourless crystals (175 mg, 88%). 1H NMR (CDCl3) δ1.43 (s, 9H), 2.89 (m, 2H), 3.41 (m, 2H), 4.55 (br s, 1H), 7.37 (d, 2H, J=8.1 Hz), 7.83 (d, 2H, J=7.8 Hz), 9.99 (s, 1H).

Workup

  1. filtrationThe reaction mixture was filtered through Celite
  2. washthe cake was washed with CH2Cl2
  3. customThe solvent was removed from the filtrate under reduced pressure

Sources & evidence

ORD record
ord-8faa7bc98e59452289dd77fa9797f335
Source dataset
uspto-grants-2004_05
Patent number
US06734191B2

Reaction notes

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