Synthesis of (2R,3S)-1,2,3-Butanetriol Derivatives From (R)-2,3-O-Isopropylideneglyceraldehyde and of the (2S,3R)-Enantiomers FromD-Glucose. Application to the Synthesis of Enantiomerically Pure Muscarine
Both enantiomers of the O-protected epoxy alcohol derivative 1b have been prepared from (R)-2,3-O-isopropylideneglyceraldehyde and D-glucose, respectively, and utilized in a practical synthesis of L- and D-muscarine iodide and chloride.
(+)-Muscarine was synthesized from S-(−)-ethyl lactate in five steps with the application of a zinc-mediated allylation reaction in aqueous media. Reversal of chelation-control stereoselectivity wa...
L(+)-muscarine and its enantiomer have been prepared in 8 steps from D- and L-threonine respectively via the highly stereoselective iodocyclization of a γ,δ-unsaturated benzylether.