Thionyl Chloride → methyl (2S)-piperidine-2-carboxylate hydrochloride

Beteiligte Stoffe

Reaktionsschritte

Thionyl chloride (161 ml) was added dropwise to a suspension of (2S)-2-piperidinecarboxylic acid L-tartrate (60 g) [see Preparation 1] in methanol (800 ml) at 0° C. The reaction mixture was stirred for 18 hours at room temperature after which time the solvent was removed under reduced pressure and the product azeotroped with toluene, precipitated out using methanol and filtered to afford (2S)-2-(methoxycarbonyl)piperidine hydrochloride (37.7 g) as a white solid.

Herkunft & Nachweise