tert-Butanol → 5-hydroxymethyl-5-hydroxy-1-(4-(2-methylbenzoylamino)benzoyl]-2,3,4,5-tetrahydro-1H-benzazepine

Participants

Reaction Steps

To 5-methylidene-1-[4-(2-methylbenzoylamino)benzoyl]-2,3,4,5-tetrahydro-1H-benzazepine (0.60 g) are added successively t-butyl alcohol (6.0 ml), water (1.2 ml), pyridine (0.3 ml), osmium tetroxide (1.2 mg) and trimethylamine N-oxide dihydrate (0.22 9), and the mixture is refluxed with stirring for 2.5 hours. After cooling, to the reaction solution is added 20% aqueous sodium hydrogen-sulfite solution (10 ml), and the mixture is stirred at room temperature for 1.5 hour. The reaction solution is extracted with a mixture of ethyl acetate/tetrahydrofuran (1:1). The extract is washed successively with diluted hydrochloric acid and saturated saline solution, and dried over magnesium sulfate. The solvent is distilled off and the resulting residue is recrystallized from ethyl acetate/n-hexane to give 5-hydroxymethyl-5-hydroxy-1-[4-(2-methylbenzoylamino)benzoyl]-2,3,4,5-tetrahydro-1H-benzazepine (0.55 g) as white powder, m.p. 136-140° C.

Provenance & Evidence