(S)-4-[2-((S)-4-hydroxy-6-aza-spiro[2.5]oct-6-yl)-ethyl]-2,2-dimethyl-oxazolidine-3-carboxylic acid benzyl ester → [(S)-3-((S)-4-Hydroxy-6-aza-spiro[2.5]oct-6-yl)-1-hydroxymethyl-propyl]-carbamic acid benzyl ester

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Reaction Steps

A solution of (S)-4-[2-((S)-4-hydroxy-6-aza-spiro[2.5]oct-6-yl)-ethyl]-2,2-dimethyl-oxazolidine-3-carboxylic acid benzyl ester (5.00 g, 12.9 mmol) in methanol/water 9:1 (50 mL) was stirred at room temperature in the presence of Amberlite® IR-120 resin (15.8 g). After 16 h the resin was collected by filtration and washed with methanol. The filtrate was discarded, and the product was recovered by digesting the Amberlite® resin three times in 7 M methanolic ammonia solution (60 mL) at room temperature over 15 min. The ammonia solutions were combined and evaporated to afford the title compound (4.27 g, 95%). Colorless oil, MS (ISP)=349.3 (M+H)+.

Provenance & Evidence