Acetic Acid → (2S,4R)-1-(2-(1H-imidazol-5-yl)acetyl)-4-(benzylamino)-N-(4-(4-fluorophenoxy)phenyl)pyrrolidine-2-carboxamide

HRID 1630287Notes

Reaction equation

HRID 1630287 reaction equation
[NH:1]1[C:5]([CH2:6][C:7]([N:9]2[CH2:13][C@H:12]([NH2:14])[CH2:11][C@H:10]2[C:15]([NH:17][C:18]2[CH:23]=[CH:22][C:21]([O:24][C:25]3[CH:30]=[CH:29][C:28]([F:31])=[CH:27][CH:26]=3)=[CH:20][CH:19]=2)=[O:16])=[O:8])=[CH:4][N:3]=[CH:2]1.[CH:32](=O)[C:33]1[CH:38]=[CH:37][CH:36]=[CH:35][CH:34]=1.C(O)(=O)C.C(O[BH-](OC(=O)C)OC(=O)C)(=O)C.[Na+]>[OH-].[Na+].C(Cl)Cl>[NH:1]1[C:5]([CH2:6][C:7]([N:9]2[CH2:13][C@H:12]([NH:14][CH2:32][C:33]3[CH:38]=[CH:37][CH:36]=[CH:35][CH:34]=3)[CH2:11][C@H:10]2[C:15]([NH:17][C:18]2[CH:19]=[CH:20][C:21]([O:24][C:25]3[CH:26]=[CH:27][C:28]([F:31])=[CH:29][CH:30]=3)=[CH:22][CH:23]=2)=[O:16])=[O:8])=[CH:4][N:3]=[CH:2]1

Participants

7

Reactant 4

HCID 176Acetic AcidHCID 240BenzaldehydeHCID 5049666Sodium triacetoxyborohydrideHCID 67010250(2S,4R)-1-(2-(1H-imidazol-5-yl)acetyl)-4-amino-N-(4-(4-fluorophenoxy)phenyl)pyrrolidine-2-carboxamide

Product 1

HCID 67009528(2S,4R)-1-(2-(1H-imidazol-5-yl)acetyl)-4-(benzylamino)-N-(4-(4-fluorophenoxy)phenyl)pyrrolidine-2-carboxamideYield 30.3%

Reagents, catalysts & solvents 2

HCID 6344DichloromethaneSolventHCID 14798Sodium HydroxideSolvent

Procedure

A flask was charged with (2S,4R)-1-(2-(1H-imidazol-5-yl)acetyl)-4-amino-N-(4-(4-fluorophenoxy)phenyl)pyrrolidine-2-carboxamide (150 mg, 0.302 mmol), benzaldehyde (0.031 mL, 0.30 mmol), methylene chloride (5 mL), acetic acid (0.140 mL, 2.45 mmol) and sodium triacetoxyborohydride (22 mg, 0.45 mmol). The reaction mixture was stirred at ambient temperature for 16 hours and then diluted with 2N sodium hydroxide (10 mL). The dilution was extracted with ethyl acetate (20 mL) and the extract was washed with brine (10 mL), dried over anhydrous sodium sulfate, filtered and concentrated. Product was purified from the residue by reverse phase HPLC to give Compound 173, (2S,4R)-1-(2-(1H-imidazol-5-yl)acetyl)-4-(benzylamino)-N-(4-(4-fluorophenoxy)phenyl)pyrrolidine-2-carboxamide (47 mg, 0.091 mmol, 30%), as an off-white solid. 1H-NMR (400 MHz, DMSO-D6): 11.94 (s, 1H), 10.09 (s, 1H), 7.60 (d, 2H), 7.34-7.28 (m, 4H), 7.25-7.17 (m, 3H), 7.03-6.96 (m, 6H), 4.48 (t, 1H), 3.60-3.32 (m, 7H), 2.12-1.99 (m, 2H). MS (EI) for C29H28FN5O3. found 513.9 (MH+).

Workup

  1. extractionThe dilution was extracted with ethyl acetate (20 mL)
  2. washthe extract was washed with brine (10 mL)
  3. dry with materialdried over anhydrous sodium sulfate
  4. filtrationfiltered
  5. concentrationconcentrated
  6. customProduct was purified from the residue by reverse phase HPLC

Sources & evidence

ORD record
ord-13ee8c8d2607483c8622754e17a270e9
Source dataset
uspto-grants-2014_07
Patent number
US08791102B2

Reaction notes

Loading…