Triethylamine → 1-(2-(3-azidopropyl)-5-(2,5-difluorophenyl)-2-phenyl-1,3,4-thiadiazol-3(2H)-yl)-2,2-dimethylpropan-1-one

HRID 270516Notes

Reaction equation

HRID 270516 reaction equation
[N:1]([CH2:4][CH2:5][CH2:6][C:7]1([C:20]2[CH:25]=[CH:24][CH:23]=[CH:22][CH:21]=2)[NH:11][N:10]=[C:9]([C:12]2[CH:17]=[C:16]([F:18])[CH:15]=[CH:14][C:13]=2[F:19])[S:8]1)=[N+:2]=[N-:3].C(N(CC)CC)C.[C:33](Cl)(=[O:38])[C:34]([CH3:37])([CH3:36])[CH3:35]>C(Cl)Cl>[N:1]([CH2:4][CH2:5][CH2:6][C:7]1([C:20]2[CH:25]=[CH:24][CH:23]=[CH:22][CH:21]=2)[N:11]([C:33](=[O:38])[C:34]([CH3:37])([CH3:36])[CH3:35])[N:10]=[C:9]([C:12]2[CH:17]=[C:16]([F:18])[CH:15]=[CH:14][C:13]=2[F:19])[S:8]1)=[N+:2]=[N-:3]

Participants

5

Reactant 3

HCID 8471TriethylamineHCID 62493Pivaloyl chlorideHCID 866048312-(3-Azidopropyl)-5-(2,5-difluorophenyl)-2-phenyl-2,3-dihydro-1,3,4-thiadiazole

Product 1

HCID 866048381-(2-(3-azidopropyl)-5-(2,5-difluorophenyl)-2-phenyl-1,3,4-thiadiazol-3(2H)-yl)-2,2-dimethylpropan-1-oneYield 92.5%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

To a cooled (0° C.) solution of 2-(3-azidopropyl)-5-(2,5-difluorophenyl)-2-phenyl-2,3-dihydro-1,3,4-thiadiazole (100 mg, 0.278 mmol) in DCM (5 mL) was added triethylamine (50.4 μL, 0.362 mmol) followed by pivaloyl chloride (45 μL, 0.362 mmol). After warming slowly to room temperature and stirring for 16 hours, the mixture was partitioned between DCM (10 mL) and saturated NaHCO3 (10 mL). The aqueous layer was extracted with DCM (10 mL) and the combined organics were washed with brine (10 mL), dried over Na2SO4, and concentrated under reduced pressure. The residue was chromatographed (19:1 hexanes/ethyl acetate) to provide the product as a pale yellow oil (114 mg, 92%).

Workup

  1. customthe mixture was partitioned between DCM (10 mL) and saturated NaHCO3 (10 mL)
  2. extractionThe aqueous layer was extracted with DCM (10 mL)
  3. washthe combined organics were washed with brine (10 mL)
  4. dry with materialdried over Na2SO4
  5. concentrationconcentrated under reduced pressure
  6. customThe residue was chromatographed (19:1 hexanes/ethyl acetate)

Sources & evidence

ORD record
ord-719584a6840f4d98aa34761a6d8e2204
Source dataset
uspto-grants-2008_11
Patent number
US07449486B2

Reaction notes

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