Glycolic Acid → N-((2S)-3-{4-[3-(2-Cyclopentyl-6-methoxy-pyridin-4-yl)-[1,2,4]oxadiazol-5-yl]-2-ethyl-6-methyl-phenoxy}-2-hydroxy-propyl)-2-hydroxy-acetamide

HRID 245121Notes

Reaction equation

HRID 245121 reaction equation
[NH2:1][CH2:2][C@H:3]([OH:33])[CH2:4][O:5][C:6]1[C:11]([CH3:12])=[CH:10][C:9]([C:13]2[O:17][N:16]=[C:15]([C:18]3[CH:23]=[C:22]([O:24][CH3:25])[N:21]=[C:20]([CH:26]4[CH2:30][CH2:29][CH2:28][CH2:27]4)[CH:19]=3)[N:14]=2)=[CH:8][C:7]=1[CH2:31][CH3:32].[C:34](O)(=[O:37])[CH2:35][OH:36].CCN(C(C)C)C(C)C.CN(C(ON1N=NC2C=CC=CC1=2)=[N+](C)C)C.[B-](F)(F)(F)F>CN(C=O)C.CC(=O)OCC>[CH:26]1([C:20]2[CH:19]=[C:18]([C:15]3[N:14]=[C:13]([C:9]4[CH:10]=[C:11]([CH3:12])[C:6]([O:5][CH2:4][C@@H:3]([OH:33])[CH2:2][NH:1][C:35](=[O:36])[CH2:34][OH:37])=[C:7]([CH2:31][CH3:32])[CH:8]=4)[O:17][N:16]=3)[CH:23]=[C:22]([O:24][CH3:25])[N:21]=2)[CH2:30][CH2:29][CH2:28][CH2:27]1

Participants

7

Reactant 4

HCID 757Glycolic AcidHCID 81531DiisopropylethylamineHCID 2733207O-(Benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium tetrafluoroborateHCID 67491454(2S)-1-amino-3-{4-[3-(2-cyclopentyl-6-methoxy-pyridin-4-yl)-[1,2,4]oxadiazol-5-yl]-2-ethyl-6-methyl-phenoxy}-propan-2-ol

Product 1

HCID 49872362N-((2S)-3-{4-[3-(2-Cyclopentyl-6-methoxy-pyridin-4-yl)-[1,2,4]oxadiazol-5-yl]-2-ethyl-6-methyl-phenoxy}-2-hydroxy-propyl)-2-hydroxy-acetamideYield 57.9%

Reagents, catalysts & solvents 2

HCID 6228DimethylformamideSolventHCID 8857Ethyl AcetateSolvent

Procedure

To a solution of (2S)-1-amino-3-{4-[3-(2-cyclopentyl-6-methoxy-pyridin-4-yl)-[1,2,4]oxadiazol-5-yl]-2-ethyl-6-methyl-phenoxy}-propan-2-ol (100 mg, 220 μmol), glycolic acid (22 mg, 289 μmol) and DIPEA (86 mg, 666 μmol) in DMF (3 mL), TBTU (93 mg, 289 μmol) is added. The mixture is stirred at rt for 1 h before it is diluted with EA (50 mL) and washed with sat. aq. NaHCO3 solution (20 mL) followed by brine (20 mL). The org. extract is dried over MgSO4, filtered and concentrated. The crude product is purified by prep. HPLC to give the title compound (65 mg) as an almost colourless oil; LC-MS**: tR=0.84 min, [M+H]+=511.03; 1H NMR (CDCL3): δ1.33 (t, J=7.5 Hz, 3H), 1.68-1.79 (m, 2H), 1.82-1.95 (m, 4H), 2.05-2.15 (m, 2H), 2.41 (s, 3H), 2.76 (q, J=7.5 Hz, 2H), 3.18-3.28 (m, 1H), 3.49-3.59 (m, 1H), 3.75-3.95 (m, 3H), 4.01 (s, 3H), 4.18-4.26 (m, 3H), 7.08 (t, J=4.3 Hz, 1H), 7.49 (s, 1H), 7.91 (s, 1H), 7.93 (s, 1H).

Workup

  1. washwashed with sat. aq. NaHCO3 solution (20 mL)
  2. extractionextract
  3. dry with materialis dried over MgSO4
  4. filtrationfiltered
  5. concentrationconcentrated
  6. customThe crude product is purified by prep

Sources & evidence

ORD record
ord-82604757e58c458d9166c918dc7efd4d
Source dataset
uspto-grants-2014_02
Patent number
US08658675B2

Reaction notes

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