Triphenylphosphine → 4-[2-(2-tert-Butyl-5-methyl-oxazol-4-yl)-ethoxy]-naphthalene-1-carbaldehyde

Participants

Reaction Steps

0.800 g of the above prepared 2-(2-tert-butyl-5-methyl-oxazol-4-yl)-ethanol (4.37 mmol) was dissolved in 25 ml of toluene and treated successively at 0° C. with 0.752 g of 4-hydroxy-naphthalene-1-carbaldehyde (4.37 mmol), 1.145 g of triphenylphosphine (4.37 mmol), and 0.883 g (4.37 mmol) of DIAD. The cooling bath was then removed and stirring continued for 4 h. Pouring onto crashed ice, twofold extraction with EtOEt, washing with dil. NaOH and water, drying over sodium sulfate, and evaporation of the solvents, followed by flash chromatography (SiO2, hexane/AcOEt=6/4) and crystallization from EtOEt, delivered finally 0.791 g of the title compound as off-white crystals of mp. 155–57° (dec.).

Provenance & Evidence