Triphenylphosphine → {1-[4-cyano-3-(trifluoromethyl)phenyl]-1H-tetrazol-5-yl}methyl acetate

HRID 517708Notes

Reaction equation

HRID 517708 reaction equation
[C:1]([O:4][CH2:5][C:6]([NH:8][C:9]1[CH:14]=[CH:13][C:12]([C:15]#[N:16])=[C:11]([C:17]([F:20])([F:19])[F:18])[CH:10]=1)=O)(=[O:3])[CH3:2].C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.CC(OC(/N=N/C(OC(C)C)=O)=O)C.C[Si]([N:58]=[N+:59]=[N-:60])(C)C>C1COCC1.C(OCC)(=O)C>[C:1]([O:4][CH2:5][C:6]1[N:8]([C:9]2[CH:14]=[CH:13][C:12]([C:15]#[N:16])=[C:11]([C:17]([F:20])([F:19])[F:18])[CH:10]=2)[N:60]=[N:59][N:58]=1)(=[O:3])[CH3:2]

Participants

7

Reactant 4

HCID 11776TriphenylphosphineHCID 78378AzidotrimethylsilaneHCID 5363146Diisopropyl azodicarboxylateHCID 666547092-{[4-Cyano-3-(trifluoromethyl)phenyl]amino}-2-oxoethyl acetate2×

Product 1

HCID 68074335{1-[4-cyano-3-(trifluoromethyl)phenyl]-1H-tetrazol-5-yl}methyl acetate

Reagents, catalysts & solvents 2

HCID 8028TetrahydrofuranSolventHCID 8857Ethyl AcetateSolvent

Procedure

To a solution of 2-{[4-cyano-3-(trifluoromethyl)phenyl]amino}-2-oxoethyl acetate (Intermediate 21, 65 g) in THF (300 mL) was added triphenylphosphine (161 g, 0.615 mol) and diisopropylazodicarboxylate (124 g, 0.615 mol) at 0° C. The reaction mixture was stirred for 30 minutes. Trimethylsilylazide (71.1 g, 0.615 mol) was added dropwise at room temperature and then heated to reflux for 4 hours. The reaction mixture was diluted with ethyl acetate and washed with ice-water. The organic layer was separated and washed with brine solution, dried over anhydrous Na2SO4 and concentrated under reduced pressure. The crude product was purified by column chromatography using an eluent of 20% ethyl acetate in petroleum ether to yield 1-[4-cyano-3-(trifluoromethyl)phenyl]-1H-tetrazol-5-yl}methyl acetate (45 g).

Workup

  1. temperatureheated
  2. temperatureto reflux for 4 hours
  3. washwashed with ice-water
  4. customThe organic layer was separated
  5. washwashed with brine solution
  6. dry with materialdried over anhydrous Na2SO4
  7. concentrationconcentrated under reduced pressure
  8. customThe crude product was purified by column chromatography
  9. customto yield 1-[4-cyano-3-(trifluoromethyl)phenyl]-1H-tetrazol-5-yl}methyl acetate (45 g)

Sources & evidence

ORD record
ord-38cbd47f764445dd86343a9715420b85
Source dataset
uspto-grants-2015_08
Patent number
US09115132B2

Reaction notes

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