Water → 4-(4-(2-Oxazolyl)phenoxy)benzaldehyde

HRID 630334Notes

Reaction equation

[O:1]1[CH:5]=[CH:4][N:3]=[C:2]1[C:6]1[CH:11]=[CH:10][C:9]([OH:12])=[CH:8][CH:7]=1.C(=O)([O-])[O-].[Cs+].[Cs+].F[C:20]1[CH:27]=[CH:26][C:23]([CH:24]=[O:25])=[CH:22][CH:21]=1.O>CN(C=O)C.C(Cl)Cl>[O:1]1[CH:5]=[CH:4][N:3]=[C:2]1[C:6]1[CH:11]=[CH:10][C:9]([O:12][C:20]2[CH:27]=[CH:26][C:23]([CH:24]=[O:25])=[CH:22][CH:21]=2)=[CH:8][CH:7]=1

Participants

Conditions

Temperature: 110 °C

Procedure

A solution of 4-(2-oxazolyl)phenol (15.7 g, 97 mmol) in DMF (120 mL) was treated with cesium carbonate (41 g, 126 mmol) and 4-fluorobenzaldehyde (13.3 g, 107 mmol). The reaction was heated at 110° C. for 2.5 hours. The reaction mixture was cooled and poured onto a mixture of ice and water. The product was isolated by extraction with methylene chloride (3×). The combined organic layers were washed with water and brine, dried, and concentrated. The residue was recrystallized from aqueous ethanol to give 19.7 g of 4-[4-(2-oxazolyl)phenoxy]-benzaldehyde.

Workup

temperatureThe reaction mixture was cooled
washThe combined organic layers were washed with water and brine
customdried
concentrationconcentrated
customThe residue was recrystallized from aqueous ethanol

Sources & evidence

ORD record: ord-f953164ef8f3462ca9a29b59771ad5e0
Source dataset: uspto-grants-2016_04
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09315509B2

Reaction notes

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