Ethanol → Methyl 5-{4-[(4-hydroxymethyl-2-methoxyphenoxy)methyl]-5-methyl-1,3-oxazol-2-yl}-2-methylbenzoate

HRID 2221634Notes

Reaction equation

HRID 2221634 reaction equation
[CH:1]([C:3]1[CH:27]=[CH:26][C:6]([O:7][CH2:8][C:9]2[N:10]=[C:11]([C:15]3[CH:16]=[CH:17][C:18]([CH3:25])=[C:19]([CH:24]=3)[C:20]([O:22][CH3:23])=[O:21])[O:12][C:13]=2[CH3:14])=[C:5]([O:28][CH3:29])[CH:4]=1)=[O:2].C(O)C.[BH4-].[Na+].O>O1CCCC1>[OH:2][CH2:1][C:3]1[CH:27]=[CH:26][C:6]([O:7][CH2:8][C:9]2[N:10]=[C:11]([C:15]3[CH:16]=[CH:17][C:18]([CH3:25])=[C:19]([CH:24]=3)[C:20]([O:22][CH3:23])=[O:21])[O:12][C:13]=2[CH3:14])=[C:5]([O:28][CH3:29])[CH:4]=1

Participants

6

Reactant 4

HCID 702EthanolHCID 962WaterHCID 4311764Sodium borohydrideHCID 86605739Methyl 5-{4-[(4-formyl-2-methoxyphenoxy)methyl]-5-methyl-1,3-oxazol-2-yl}-2-methylbenzoate

Product 1

HCID 69218085Methyl 5-{4-[(4-hydroxymethyl-2-methoxyphenoxy)methyl]-5-methyl-1,3-oxazol-2-yl}-2-methylbenzoateYield 96%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

To a solution of methyl 5-{4-[(4-formyl-2-methoxyphenoxy)methyl]-5-methyl-1,3-oxazol-2-yl}-2-methylbenzoate (1.35 g) in tetrahydrofuran (30 mL)-ethanol (5 mL) was gradually added sodium borohydride 1 (65 mg) at 0° C. After stirring at room temperature for 1 hr, water was added to the reaction mixture, and the mixture was extracted with ethyl acetate. The organic layer was washed with saturated brine, dried over anhydrous magnesium sulfate and concentrated to give methyl 5-{4-[(4-hydroxymethyl-2-methoxyphenoxy)methyl]-5-methyl-1,3-oxazol-2-yl}-2-methylbenzoate as colorless crystals (1.30 g, yield 96%). Recrystallization from ethyl acetate-hexane gave colorless prism crystals. melting point: 145-146° C.

Workup

  1. customat 0° C
  2. extractionthe mixture was extracted with ethyl acetate
  3. washThe organic layer was washed with saturated brine
  4. dry with materialdried over anhydrous magnesium sulfate
  5. concentrationconcentrated

Sources & evidence

ORD record
ord-e12217ca071a4f029186d52c9eb0bf25
Source dataset
uspto-grants-2008_05
Patent number
US07368578B2

Reaction notes

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