Triethylamine → 1-(Diphenylmethyl)azetidin-3-one

HRID 471036Notes

Reaction equation

HRID 471036 reaction equation
C(N(CC)CC)C.[CH:8]([N:21]1[CH2:24][CH:23]([OH:25])[CH2:22]1)([C:15]1[CH:20]=[CH:19][CH:18]=[CH:17][CH:16]=1)[C:9]1[CH:14]=[CH:13][CH:12]=[CH:11][CH:10]=1.S(=O)(=O)=O.N1C=CC=CC=1>CS(C)=O>[CH:8]([N:21]1[CH2:24][C:23](=[O:25])[CH2:22]1)([C:15]1[CH:20]=[CH:19][CH:18]=[CH:17][CH:16]=1)[C:9]1[CH:10]=[CH:11][CH:12]=[CH:13][CH:14]=1

Participants

5

Reactant 3

HCID 8471TriethylamineHCID 168533Sulfur trioxide-pyridineHCID 3304481-(Diphenylmethyl)azetidin-3-ol

Product 1

HCID 37355581-(Diphenylmethyl)azetidin-3-one

Reagents, catalysts & solvents 1

HCID 679Dimethyl SulfoxideSolvent2×

Conditions

Temperature
20 °C

Procedure

Triethylamine (24.7 mL) was added to a solution of 1-benzhydrylazetidin-3-ol (5 g) in DMSO (25 mL). A solution of pyridine sulphur trioxide (18 g) in DMSO (65 mL) was added dropwise and the mixture stirred at 20° C. for 90 minutes. The mixture was poured onto ice/water and extracted twice with ethyl acetate, the combined organics were washed three times with brine before being dried over sodium sulphate, filtered and the solvent removed under reduced pressure. The crude product was purified by flash silica chromatography using 2% triethylamine in isohexane as solvent. Pure fractions were evaporated to dryness to afford the subtitled compound. Yield 2.9 g.

Workup

  1. additionThe mixture was poured onto ice/water
  2. extractionextracted twice with ethyl acetate
  3. washthe combined organics were washed three times with brine
  4. dry with materialbefore being dried over sodium sulphate
  5. filtrationfiltered
  6. customthe solvent removed under reduced pressure
  7. customThe crude product was purified by flash silica chromatography
  8. customPure fractions were evaporated to dryness

Sources & evidence

ORD record
ord-4c710c47a8504afe97c6df41ebcb7a64
Source dataset
uspto-grants-2014_01
Patent number
US08629271B2

Reaction notes

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