1-Hydroxybenzotriazole → (S)-3-cyclohexyl-N-[1-(2-hydroxy-2-methyl-propyl)-1H-pyrazol-3-yl]-2-(2-oxo-4-phenoxy-2,5-dihydro-pyrrol-1-yl)-propionamide

HRID 19298Notes

Reaction equation

HRID 19298 reaction equation
[CH:1]1([CH2:7][C@H:8]([N:12]2[CH2:16][C:15]([O:17][C:18]3[CH:23]=[CH:22][CH:21]=[CH:20][CH:19]=3)=[CH:14][C:13]2=[O:24])[C:9]([OH:11])=O)[CH2:6][CH2:5][CH2:4][CH2:3][CH2:2]1.Cl.[CH3:26]N(C)CCCN=C=NCC.C(N(CC)C(C)C)(C)C.ON1C2C=CC=CC=2N=N1.Cl.[OH:57][C@@H:58]([CH2:88]O)[CH2:59][N:60]1[CH:64]=[CH:63][C:62]([NH:65]C(=O)[C@@H](N2CC(OC3C=CC=C(Cl)C=3Cl)=CC2=O)CC(C)C)=[N:61]1>ClCCl.C(OCC)(=O)C>[CH:1]1([CH2:7][C@H:8]([N:12]2[CH2:16][C:15]([O:17][C:18]3[CH:19]=[CH:20][CH:21]=[CH:22][CH:23]=3)=[CH:14][C:13]2=[O:24])[C:9]([NH:65][C:62]2[CH:63]=[CH:64][N:60]([CH2:59][C:58]([OH:57])([CH3:88])[CH3:26])[N:61]=2)=[O:11])[CH2:2][CH2:3][CH2:4][CH2:5][CH2:6]1

Participants

8

Reactant 5

HCID 757711-HydroxybenzotriazoleHCID 81531DiisopropylethylamineHCID 27239391,3-Propanediamine, N'-(ethylcarbonimidoyl)-N,N-dimethyl-, monohydrochlorideHCID 66895449(S)-3-cyclohexyl-2-(2-oxo-4-phenoxy-2,5-dihydro-pyrrol-1-yl)-propionic acidHCID 66899094HMS5552 HCl

Product 1

HCID 57920090(S)-3-cyclohexyl-N-[1-(2-hydroxy-2-methyl-propyl)-1H-pyrazol-3-yl]-2-(2-oxo-4-phenoxy-2,5-dihydro-pyrrol-1-yl)-propionamideYield 22.5%

Reagents, catalysts & solvents 2

HCID 6344DichloromethaneSolventHCID 8857Ethyl AcetateSolvent

Conditions

Temperature
23 °C

Procedure

To a stirred solution of (S)-3-cyclohexyl-2-(2-oxo-4-phenoxy-2,5-dihydro-pyrrol-1-yl)-propionic acid (80 mg, 0.2 mmol) in dichloromethane (8 mL) was gradually added 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (137 mg, 0.7 mmol) and N,N-diisopropylethylamine (155 mg, 1.2 mmol) at room temperature, under nitrogen. After 15 min, 1-hydroxybenzotriazole (110 mg, 0.7 mmol) and 1-(3-amino-pyrazol-1-yl)-2-methyl-propan-2-ol (prepared in U.S. Pat. Appl. US2008021032 Example 80, 37 mg, 0.2 mmol) were added to the reaction mixture. The reaction mixture was then stirred at 23° C. for 48 h. The reaction mixture was diluted with ethyl acetate and washed with a saturated aqueous ammonium chloride solution followed by a saturated aqueous sodium bicarbonate solution. The organic layer was then washed with a saturated aqueous sodium chloride solution, separated, dried over sodium sulfate and concentrated in vacuo to afford the crude product, which was purified by flash column chromatography (silica gel (100-200 mesh)) which afforded (S)-3-cyclohexyl-N-[1-(2-hydroxy-2-methyl-propyl)-1H-pyrazol-3-yl]-2-(2-oxo-4-phenoxy-2,5-dihydro-pyrrol-1-yl)-propionamide (21 mg, 19%) as an off-white gummy solid: 1H NMR (400 MHz, CDCl3) δ ppm 0.83-1.08 (m, 2H), 1.13 (s, 6H), 1.24 (s, 3H), 1.58-2.06 (m, 8H), 3.77 (br. s., 1H), 3.91 (s, 2H), 4.08 (d, J=18.1 Hz, 1H), 4.32 (d, J=18.1 Hz, 1H), 4.87-4.96 (m, 1H), 4.96 (s, 1H), 6.67 (s, 1H), 7.15 (d, J=7.8 Hz, 2H), 7.20-7.31 (m, 1H), 7.39 (t, J=7.8 Hz, 2H), 9.01 (s, 1H).

Workup

  1. customat room temperature
  2. washwashed with a saturated aqueous ammonium chloride solution
  3. washThe organic layer was then washed with a saturated aqueous sodium chloride solution
  4. customseparated
  5. dry with materialdried over sodium sulfate
  6. concentrationconcentrated in vacuo
  7. customto afford the crude product, which
  8. customwas purified by flash column chromatography (silica gel (100-200 mesh)) which

Sources & evidence

ORD record
ord-81fe88e143b14319b9329575cc39cdeb
Source dataset
uspto-grants-2010_06
Patent number
US07741327B2

Reaction notes

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