Glycosyltransferase Inhibitors: Synthesis of <scp>d</scp>-<i>threo</i>-PDMP, <scp>l</scp>-<i>threo</i>-PDMP, and Other Brain Glucosylceramide Synthase Inhibitors from <scp>d</scp>- or <scp>l</scp>-Serine
作者:Scott A. Mitchell、Bryan D. Oates、Hossein Razavi、Robin Polt
DOI:10.1021/jo980951j
日期:1998.11.1
The synthesis of enantiomerically pure (1S,2S)-1-phenyl-2-decanoylamino-3-N-morpholino-1- propanol (L-threo-PDMP) (la) from L-serine, and the enantiomer (1R,2R)-1-phenyl-2-decanoylamino-3-morpholino-1-propanol (D-threo-PDMP] (Ib) from D-serine is reported. Reductive alkylation of the fully protected O'Donnell's Schiff base (3b) derived from D-serine provided the beta-amino alcohol 5b in high yield and excellent selectivity, which yielded optically pure Ib in high yield after six steps. Three other D-threo-PDMP analogues with various amine groups have been synthesized using the same methodology, including the more potent pyrrolidine compound D-threo-PDPP (le). A key feature of the synthesis is the isolation of tosylate (8b), which allows for the divergent synthesis of many analogues from a common advanced intermediate. The synthesis is amenable to large-scale production of D-threo-PDMP, L-threo-PDMP, and similar compounds.