Triphenylphosphine → HCID 54308849, compound

Participants

Reaction Steps

To a solution of methyl 4-(4-hydroxyphenyl)benzoate (0.94 g), (S)-(−)-2-(tert-butoxycarbonylamino)-3-cyclohexyl-1-propanol (1.00 g) and triphenylphosphine (1.62 g) in N,N-dimethylformamide (20 ml) was added dropwise diisopropyl azodicarboxylate (1.21 ml) for 10 minutes under ice-cooling in a stream of nitrogen. The solution was stirred for 16 hours at ambient temperature, and then water was added to the reaction mixture, and the mixture was extracted with ethyl acetate. The organic layer was washed with saturated aqueous sodium chloride solution, dried over magnesium sulfate, filtered and concentrated in vacuo. The residue was purified by silica gel column chromatography eluting with a mixed solvent of n-hexane-ethyl acetate (from 0% to 20% gradient elution) to give methyl (S)-4-[4-[2-(tert-butoxycarbonylamino)-3-cyclohexylpropyloxy]phenyl]benzoate (290 mg) as a white solid.

Provenance & Evidence