Triethylamine → (S)-4-methyl-2-(2-oxo-4-o-tolyloxy-2,5-dihydro-pyrrol-1-yl)-pentanoic acid (1-methyl-1H-pyrazol-3-yl)-amide

HRID 19128Notes

Reaction equation

HRID 19128 reaction equation
[CH3:1][CH:2]([CH3:22])[CH2:3][C@H:4]([N:8]1[CH2:12][C:11]([O:13][C:14]2[CH:19]=[CH:18][CH:17]=[CH:16][C:15]=2[CH3:20])=[CH:10][C:9]1=[O:21])[C:5]([OH:7])=O.[CH3:23][N:24]1[CH:28]=[CH:27][C:26]([NH2:29])=[N:25]1.F[P-](F)(F)(F)(F)F.N1(O[P+](N(C)C)(N(C)C)N(C)C)C2C=CC=CC=2N=N1.C(N(CC)CC)C>CN(C)C=O>[CH3:23][N:24]1[CH:28]=[CH:27][C:26]([NH:29][C:5](=[O:7])[C@@H:4]([N:8]2[CH2:12][C:11]([O:13][C:14]3[CH:19]=[CH:18][CH:17]=[CH:16][C:15]=3[CH3:20])=[CH:10][C:9]2=[O:21])[CH2:3][CH:2]([CH3:1])[CH3:22])=[N:25]1

Participants

6

Reactant 4

HCID 8471TriethylamineHCID 1372541-Methyl-3-aminopyrazoleHCID 151348Benzotriazol-1-yloxy-tris(dimethylamino)phosphonium hexafluorophosphateHCID 66893909(S)-4-methyl-2-(2-oxo-4-o-tolyloxy-2,5-dihydro-pyrrol-1-yl)-pentanoic acid

Product 1

HCID 57920026(S)-4-methyl-2-(2-oxo-4-o-tolyloxy-2,5-dihydro-pyrrol-1-yl)-pentanoic acid (1-methyl-1H-pyrazol-3-yl)-amideYield 19%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Conditions

Temperature
0 °C

Procedure

To a solution of (S)-4-methyl-2-(2-oxo-4-o-tolyloxy-2,5-dihydro-pyrrol-1-yl)-pentanoic acid (0.208 g, 0.69 mmol) in N,N-dimethylformamide (4 mL) was added 1-methyl-1H-pyrazol-3-ylamine (0.080 g, 0.82 mmol) and benzotriazol-1-yl-oxy-tris(dimethylamino)phosphonium hexafluorophosphate (0.620 g, 1.40 mmol). The mixture was stirred at 0° C. and triethylamine (0.150 g, 1.48 mmol) was added. The mixture was stirred at room temperature for 3 h and the solvents were evaporated. The residue was treated with ethyl acetate and ammonium chloride solution, and the organic layer separated. The organic layer was washed with brine and dried over sodium sulfate. The solvents were evaporated and the residue was purified by ISCO flash chromatography (Teledyne Isco RediSep Flash Column 25 g, 20% to 100% ethyl acetate/hexanes) which afforded (S)-4-methyl-2-(2-oxo-4-o-tolyloxy-2,5-dihydro-pyrrol-1-yl)-pentanoic acid (1-methyl-1H-pyrazol-3-yl)-amide (0.050 g, 19%) as a tan solid: HR-ES-MS m/z calculated for C21H26N4O3 [M+H]+ 383.2078, observed 383.2077, 1H NMR (300 MHz, DMSO-d6) δ ppm 1.00-0.90 (d, J=6.3 Hz, 3H), 0.94 (d, J=6.3 Hz, 3H), 1.20-1.92 (m, 3H), 2.19 (s, 3H), 3.73 (s, 3H), 4.20 (d, J=18.1 Hz, 1H), 4.57 (d, J=18.1 Hz, 1H), 4.63 (s, 1H), 4.87 (dd, J=10.3, 4.8 Hz, 1H), 6.40 (d, J=1.8 Hz, 1H), 7.17-7.33 (m, 3H), 7.36 (d, J=7.2 Hz, 1H), 7.55 (d, J=1.8 Hz, 1H), 10.72 (s, 1H).

Workup

  1. stirringThe mixture was stirred at room temperature for 3 h
  2. customthe solvents were evaporated
  3. additionThe residue was treated with ethyl acetate and ammonium chloride solution
  4. customthe organic layer separated
  5. washThe organic layer was washed with brine
  6. dry with materialdried over sodium sulfate
  7. customThe solvents were evaporated
  8. customthe residue was purified by ISCO flash chromatography (Teledyne Isco RediSep Flash Column 25 g, 20% to 100% ethyl acetate/hexanes) which

Sources & evidence

ORD record
ord-ab7d82d1951e459cbf48a9dd6b176ac3
Source dataset
uspto-grants-2010_06
Patent number
US07741327B2

Reaction notes

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