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Methanol → 3-{5-[1-Hydroxy-3-(5-methyl-2-phenyl-oxazol-4-yl)-propyl]-thiophen-2-yl}-2-methyl-2-phenoxy-propionic acid methyl ester

HRID 1393483
Notes
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Reaction equation

HRID 1393483 reaction equation
[CH3:1][O:2][C:3](=[O:35])[C:4]([CH3:34])([O:27][C:28]1[CH:33]=[CH:32][CH:31]=[CH:30][CH:29]=1)[CH2:5][C:6]1[S:7][C:8]([C:11](=[O:26])[CH2:12][CH2:13][C:14]2[N:15]=[C:16]([C:20]3[CH:25]=[CH:24][CH:23]=[CH:22][CH:21]=3)[O:17][C:18]=2[CH3:19])=[CH:9][CH:10]=1.CO.[BH4-].[Na+].CCOC(C)=O>C1COCC1.CCCCCC>[CH3:1][O:2][C:3](=[O:35])[C:4]([CH3:34])([O:27][C:28]1[CH:33]=[CH:32][CH:31]=[CH:30][CH:29]=1)[CH2:5][C:6]1[S:7][C:8]([CH:11]([OH:26])[CH2:12][CH2:13][C:14]2[N:15]=[C:16]([C:20]3[CH:21]=[CH:22][CH:23]=[CH:24][CH:25]=3)[O:17][C:18]=2[CH3:19])=[CH:9][CH:10]=1
ParticipantsConditionsProcedureWorkupSources & evidenceReaction notes

Participants

7

Reactant 4

HCID 887MethanolHCID 8857Ethyl AcetateHCID 4311764Sodium borohydrideHCID 208231592-Methyl-3-{5-[3-(5-methyl-2-phenyl-oxazol-4-yl)-propionyl]-thiophen-2-yl}-2-phenoxy-propionic acid methyl ester

Product 1

HCID 208231613-{5-[1-Hydroxy-3-(5-methyl-2-phenyl-oxazol-4-yl)-propyl]-thiophen-2-yl}-2-methyl-2-phenoxy-propionic acid methyl ester
Yield 65%

Reagents, catalysts & solvents 2

HCID 8028TetrahydrofuranSolventHCID 8058HexaneSolvent

Conditions

Temperature
0 °C

Procedure

A sample of 2-methyl-3-{5-[3-(5-methyl-2-phenyl-oxazol-4-yl)-propionyl]-thiophen-2-yl}-2-phenoxy-propionic acid methyl ester (1.00 g, 2.04 mmol) was dissolved in THF (40 mL) and MeOH (20 mL) and cooled to 0° C. Sodium borohydride (115 mg, 3.06 mmol) was added and allowed to stir at 0° C. for 45 min. The reaction was monitored by HPLC. Upon the completion of the reaction, the bulk of the solvent was removed in vacuo and water (40 mL) was added. The mixture was acidified with 6 N HCl (20 mL) and stirred for 30 min. This aqueous mixture was then extracted with CH2Cl2 (2×50 mL). The organic fractions were combined, dried over NaCl, and solvent removed in vacuo to give a crude oil. Flash chromatography (gradient 20% to 40% EtOAc in hexane) provided 650 mg (65%) of desired product: 1H NMR (400 MHz, CDCl3) δ 8.02 (d, 2 H), 7.47 (m, 3 H), 7.19 (m, 2 H), 6.96 (t, 1 H), 6.79 (m, 3 H), 6.68 (d, 2 H), 4.96 (m, 1 H), 3.72 (s, 3 H), 3.43 (d, 1 H), 3.29 (d, 1 H), 2.71 (m, 2 H), 2.30 (s, 3 H), 2.17 (m, 2 H), 1.42 (s, 3 H); MS (EI) 492.2 (M+H)+.

Workup

  1. customUpon the completion of the reaction
  2. customthe bulk of the solvent was removed in vacuo and water (40 mL)
  3. additionwas added
  4. stirringstirred for 30 min
  5. extractionThis aqueous mixture was then extracted with CH2Cl2 (2×50 mL)
  6. dry with materialdried over NaCl, and solvent
  7. customremoved in vacuo
  8. customto give a crude oil

Sources & evidence

ORD record
ord-2ba3424effd0450ea54c95ca0f5cc2fa
Source dataset
uspto-grants-2008_03
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US07345070B2

Reaction notes

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On this pageParticipantsConditionsProcedureWorkupSources & evidenceReaction notes