1,8-Diazabicyclo(5.4.0)undec-7-ene → 1-(2-Hydroxy-2-(4-(5-(5-phenyl-4-propylisoxazol-3-yl)-1,2,4-oxadiazol-3-yl)phenyl)ethyl)pyrrolidine-3-carboxylic acid

HRID 1948472Notes

Reaction equation

HRID 1948472 reaction equation
Br[CH2:2][CH:3]([C:5]1[CH:10]=[CH:9][C:8]([C:11]2[N:15]=[C:14]([C:16]3[C:20]([CH2:21][CH2:22][CH3:23])=[C:19]([C:24]4[CH:29]=[CH:28][CH:27]=[CH:26][CH:25]=4)[O:18][N:17]=3)[O:13][N:12]=2)=[CH:7][CH:6]=1)[OH:4].[NH:30]1[CH2:34][CH2:33][CH:32]([C:35]([OH:37])=[O:36])[CH2:31]1.C1CCN2C(=NCCC2)CC1>CS(C)=O>[OH:4][CH:3]([C:5]1[CH:10]=[CH:9][C:8]([C:11]2[N:15]=[C:14]([C:16]3[C:20]([CH2:21][CH2:22][CH3:23])=[C:19]([C:24]4[CH:29]=[CH:28][CH:27]=[CH:26][CH:25]=4)[O:18][N:17]=3)[O:13][N:12]=2)=[CH:7][CH:6]=1)[CH2:2][N:30]1[CH2:34][CH2:33][CH:32]([C:35]([OH:37])=[O:36])[CH2:31]1

Participants

5

Reactant 3

HCID 811841,8-Diazabicyclo(5.4.0)undec-7-eneHCID 30346453-Pyrrolidinecarboxylic acidHCID 583740872-Bromo-1-(4-(5-(5-phenyl-4-propylisoxazol-3-yl)-1,2,4-oxadiazol-3-yl)phenyl)ethanol

Product 1

HCID 509251811-(2-Hydroxy-2-(4-(5-(5-phenyl-4-propylisoxazol-3-yl)-1,2,4-oxadiazol-3-yl)phenyl)ethyl)pyrrolidine-3-carboxylic acid

Reagents, catalysts & solvents 1

HCID 679Dimethyl SulfoxideSolvent

Conditions

Temperature
80 °C

Procedure

To a mixture of 2-bromo-1-(4-(5-(5-phenyl-4-propylisoxazol-3-yl)-1,2,4-oxadiazol-3-yl)phenyl)ethanol, Preparation 1C (30 mg, 0.066 mmol) and pyrrolidine-3-carboxylic acid (22.81 mg, 0.198 mmol) in DMSO (2 mL) was added DBU (0.030 mL, 0.198 mmol). The reaction mixture was heated at 80° C. for 2 hours. The crude material was purified via preparative LC/MS with the following conditions: Column. Waters XBridge C18, 19×100 mm, 5-μm particles; Guard Column: none; Mobile Phase A: 5:95 acetonitrile:water with 0.05% TFA; Mobile Phase B: 95:5, acetonitrile:water with 0.05% TFA; Gradient: 25-100% B over 10 minutes, then a 5-minute hold at 100% B; Flow: 20 mL/min. Fractions containing the product were combined and dried via centrifugal evaporation. The yield of 1-(2-hydroxy-2-(4-(5-(5-phenyl-4-propylisoxazol-3-yl)-1,2,4-oxadiazol-3-yl)phenyl)ethyl) pyrrolidine-3-carboxylic acid was 16.3 mg, and its purity was 96%. 1H NMR (400 MHz, MeOH-d3) δ ppm 8.21 (2H, d, J=8.35 Hz), 7.81 (2H, dd, J=8.02, 1.65 Hz), 7.69 (2H, d, J=8.35 Hz), 7.54-7.66 (3H, m), 5.10-5.22 (1H, m), 3.39-3.54 (4H, m), 3.24-3.27 (3H, m), 3.00-3.10 (2H, m), 2.23-2.57 (2H, m), 1.70-1.83 (2H, m), 1.05 (3H, t, J=7.36 Hz). MS (m+1)=489. HPLC Peak RT=2.08 minutes. (Analytical Method C). Purity=96%.

Workup

  1. customThe crude material was purified via preparative LC/MS with the following conditions
  2. customa 5-minute hold
  3. additionFractions containing the product
  4. customdried via centrifugal evaporation

Sources & evidence

ORD record
ord-61db34eee65f4637a4fe7a6429222658
Source dataset
uspto-grants-2013_03
Patent number
US08399451B2

Reaction notes

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