Triethylammonium formate → (2R, 3S)-3-benzoylamino-1-chloro-2-hydroxy-4-phenylbutane

Participants

Reaction Steps

(3S)-3-Benzoylamino-1-chloro-4-phenyl-2-butanone (301.8 mg, 1.0 mmol) and a formic acid/triethylamine azeotropic mixture (0.2 ml) were added to a solution of chloro(pentamethylcyclopentadienyl)rhodium (III) (1R,2R)-N-(p-toluenesulfonyl)-1,2-diphenylethylenediamine (0.67 mg, 0.001 mmol, s/c=1000) in ethyl acetate (0.5 ml), followed by stirring at room temperature for 2 hours. After completion of the reaction, the reaction mixture was purified by silica gel column chromatography to afford a desired compound, (2R, 3S)-3-benzoylamino-1-chloro-2-hydroxy-4-phenylbutane (300.1 mg; yield: 98.8%). The production ratio of the desired (2R,3S)-form to the isomeric (2S,3S)-form, (2R,3S):(2S,3S), was 27.3:1. The results of elementary analysis were as follows.

Provenance & Evidence