Triethylamine → 2-{4-[1-(4-trifluoromethoxyphenyl)-1H-[1,2,4]triazol-3-yl]phenyl}cyclopropanecarbonyl azide

HRID 924176Notes

Reaction equation

HRID 924176 reaction equation
[F:1][C:2]([F:28])([F:27])[O:3][C:4]1[CH:9]=[CH:8][C:7]([N:10]2[CH:14]=[N:13][C:12]([C:15]3[CH:20]=[CH:19][C:18]([CH:21]4[CH2:23][CH:22]4[C:24](O)=[O:25])=[CH:17][CH:16]=3)=[N:11]2)=[CH:6][CH:5]=1.C(N(CC)CC)C.P([N:52]=[N+:53]=[N-:54])(=O)(OC1C=CC=CC=1)OC1C=CC=CC=1>C1(C)C=CC=CC=1>[F:27][C:2]([F:28])([F:1])[O:3][C:4]1[CH:5]=[CH:6][C:7]([N:10]2[CH:14]=[N:13][C:12]([C:15]3[CH:20]=[CH:19][C:18]([CH:21]4[CH2:23][CH:22]4[C:24]([N:52]=[N+:53]=[N-:54])=[O:25])=[CH:17][CH:16]=3)=[N:11]2)=[CH:8][CH:9]=1

Participants

5

Reactant 3

HCID 8471TriethylamineHCID 123414Diphenylphosphoryl azideHCID 904043052-(4-(1-(4-(trifluoromethoxy)phenyl)-1H-1,2,4-triazol-3-yl)phenyl)cyclopropanecarboxylic acid

Product 1

HCID 866687332-{4-[1-(4-trifluoromethoxyphenyl)-1H-[1,2,4]triazol-3-yl]phenyl}cyclopropanecarbonyl azideYield 73.2%

Reagents, catalysts & solvents 1

HCID 1140TolueneSolvent

Procedure

To 2-(4-(1-(4-(trifluoromethoxy)phenyl)-1H-1,2,4-triazol-3-yl)phenyl)-cyclopropanecarboxylic acid (C20) (2.49 g, 6.40 mmol) in toluene (30 mL) was added triethylamine (2.20 mL, 16.0 mmol), followed by diphenyl phosphorazidate (1.70 mL, 8.00 mmol). The yellow solution was stirred overnight at room temperature. The reaction was quenched with water and saturated aqueous sodium bicarbonate, extracted with 1:1 ethyl acetate/hexanes (2×), dried over anhydrous sodium sulfate, and filtered. The crude compound was adsorbed onto silica gel and purified by flash column chromatography using 0-100% ethyl acetate/hexanes as eluent to afford the title compound as a yellow oil (1.94 g, 73%): 1H NMR (400 MHz, CDCl3) δ 8.56 (s, 1H), 8.16-8.03 (m, 2H), 7.83-7.72 (m, 2H), 7.44-7.34 (m, 2H), 7.20 (d, J=8.2 Hz, 2H), 2.70 (ddd, J=9.3, 6.8, 4.1 Hz, 1H), 1.98 (ddd, J=8.4, 5.3, 4.1 Hz, 1H), 1.78 (dt, J=9.4, 5.0 Hz, 1H), 1.53 (ddd, J=8.3, 6.8, 4.7 Hz, 1H); 19F NMR (376 MHz, CDCl3) δ −58.03.

Workup

  1. customThe reaction was quenched with water and saturated aqueous sodium bicarbonate
  2. extractionextracted with 1:1 ethyl acetate/hexanes (2×)
  3. dry with materialdried over anhydrous sodium sulfate
  4. filtrationfiltered
  5. custompurified by flash column chromatography

Sources & evidence

ORD record
ord-964007d8de9047d98a901390744936cb
Source dataset
uspto-grants-2016_03
Patent number
US09278964B2

Reaction notes

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