Hydrochloric Acid → HCID 54137898, Verbindung

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

A mixture of (2S,4R)-4-t-butyldimethylsilyloxy-1-t-butoxycarbonyl-2-(hydroxymethyl)pyrrolidine (0.62 g), 2-bromoacetic acid (0.26 g), 85% potassium hydroxide (0.37 g), and potassium iodide (0.93 g) in t-butyl alcohol (12 ml) was heated at 50° C. for 3 hours. The mixture was poured into water (100 ml), adjusted to pH 4 with 1N hydrochloric acid and saturated with sodium chloride. The aqueous mixture was extracted with three 50 ml portions of ethyl acetate. The organic layer was washed with brine, dried over magnesium sulfate and evaporated. The residue was chromatographed on silica gel (30 g ) eluting with a mixture of methanol and dichloromethane (1:9 V/V) to give (2S,4R)-1-t-butoxycarbonyl-4-t-butyldimethylsilyloxy-2-(carboxymethyloxymethyl)pyrrolidine (0.57 g).

Herkunft & Nachweise