171925-21-6Relevant articles and documents
Synthesis of polyhydroxyindolizidines from 5,6-dihydro-2H-pyran-2-one
Socha, Dariusz,Jurczak, Margarita,Chmielewski, Marek
, p. 315 - 318 (2001)
(1aR,5aR,5bS,6S,7S)-6,7-Di-tert-butoxy-5-oxo-pyrrolidino[1,2-b]isoxazolidino [4,5-c]tetrahydropyran (8) prepared by (1,3)-dipolar cycloaddition of the cyclic nitrone 6 derived from tartaric acid to 5,6-dihydro-2H-pyran-2-one (7) was transformed into indolizidine 11 via a sequence of reactions involving methanolysis of the lactone ring, intramolecular alkylation of the nitrogen atom promoted by a carbontetrabromide-triphenylphosphine mixture and hydrogenolysis of the N-O bond. Decarboxylation of 11 provided known 7-hydroxylentiginosine derivative 14, whereas oxidative decarboxylation gave indolizidine 15 structurally related to castanospermine.
The Chemistry of Castanospermine, Part IV1: Synthetic Modifications at C-8
Furneaux, Richard H.,Gainsford, Graeme J.,Mason, Jennifer M.,Tyler, Peter C.,Hartley, Oliver,Winchester, Bryan G.
, p. 12611 - 12630 (2007/10/02)
New methods for the selective functionalisation of castanospermine has enabled the synthesis of analogues and derivatives selectively modified at C-8.