p-Toluenesulfonic acid monohydrate → HCID 57920107, compound

HRID 19088Notes

Reaction equation

HRID 19088 reaction equation
CC1(C)[O:6][C@H:5]([CH2:7][N:8]2[CH:12]=[CH:11][C:10]([NH:13][C:14](=[O:35])[C@@H:15]([N:20]3[CH2:24][C:23]([O:25][C:26]4[CH:31]=[CH:30][C:29]([F:32])=[CH:28][C:27]=4[F:33])=[CH:22][C:21]3=[O:34])[CH2:16][CH:17]([CH3:19])[CH3:18])=[N:9]2)[CH2:4][O:3]1.O.C1(C)C=CC(S(O)(=O)=O)=CC=1>CO.C(OCC)(=O)C>[OH:6][C@@H:5]([CH2:4][OH:3])[CH2:7][N:8]1[CH:12]=[CH:11][C:10]([NH:13][C:14](=[O:35])[C@@H:15]([N:20]2[CH2:24][C:23]([O:25][C:26]3[CH:31]=[CH:30][C:29]([F:32])=[CH:28][C:27]=3[F:33])=[CH:22][C:21]2=[O:34])[CH2:16][CH:17]([CH3:19])[CH3:18])=[N:9]1

Participants

5

Reactant 2

HCID 521998p-Toluenesulfonic acid monohydrateHCID 66899806HCID 66899806, compound

Product 1

HCID 57920107HCID 57920107, compoundYield 80%

Reagents, catalysts & solvents 2

HCID 887MethanolSolventHCID 8857Ethyl AcetateSolvent

Conditions

Temperature
25 °C

Procedure

A solution of (S)-2-[4-(2,4-difluoro-phenoxy)-2-oxo-2,5-dihydro-pyrrol-1-yl]-4-methyl-pentanoic acid [1-((R)-2,2-dimethyl-[1,3]dioxolan-4-yl-methyl)-1H-pyrazol-3-yl]-amide (0.62 g, 1.24 mmol) in methanol (12.4 mL) at 25° C. was treated with p-toluenesulfonic acid monohydrate (35 mg, 0.18 mmol). The reaction was stirred at 25° C. overnight. At this time, the reaction was diluted with ethyl acetate (100 mL) and was washed with a saturated aqueous sodium bicarbonate solution (1×150 mL) and a saturated aqueous sodium chloride solution (1×150 mL), dried over sodium sulfate, filtered and concentrated in vacuo. Purification by Analogix flash chromatography (40 g, 2-5% methanol/dichloromethane gradient) afforded (S)-2-[4-(2,4-difluoro-phenoxy)-2-oxo-2,5-dihydro-pyrrol-1-yl]-4-methyl-pentanoic acid [1-((R)-2,3-dihydroxy-propyl)-1H-pyrazol-3-yl]-amide (0.46 g, 80%) as an off-white solid: HR-ES-MS m/z calculated for C22H26N4O5F2 [M+H]+ 465.1944, observed 465.1944; 1H NMR (300 MHz, DMSO-d6) δ ppm 0.90 (d, J=6.3 Hz, 3H), 0.94 (d, J=6.6 Hz, 3H), 1.34-1.50 (m, 1H), 1.50-1.67 (m, 1H), 1.67-1.89 (m, 1H), 3.21-3.32 (m, 2H), 3.78 (br. s., 1H), 3.87 (dd, J=13.6, 7.5 Hz, 1H), 4.09 (dd, J=13.6, 3.6 Hz, 1H), 4.22 (d, J=18.4 Hz, 1H), 4.60 (d, J=18.4 Hz, 1H), 4.71 (t, J=5.4 Hz, 1H), 4.81-4.99 (m, 3H), 6.41 (d, J=2.1 Hz, 1H), 7.12-7.26 (m, 1H), 7.48-7.66 (m, 3H), 10.78 (s, 1H).

Workup

  1. washwas washed with a saturated aqueous sodium bicarbonate solution (1×150 mL)
  2. dry with materiala saturated aqueous sodium chloride solution (1×150 mL), dried over sodium sulfate
  3. filtrationfiltered
  4. concentrationconcentrated in vacuo
  5. customPurification by Analogix flash chromatography (40 g, 2-5% methanol/dichloromethane gradient)

Sources & evidence

ORD record
ord-e754e3217c1f42feb44d7b237423841b
Source dataset
uspto-grants-2010_06
Patent number
US07741327B2

Reaction notes

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