217324-99-7Relevant articles and documents
An approach to the bicyclic core of the zaragozic acids via the aldol reaction between methyl (α-D-xylofuranoside)uronate and D-(R)-glyceraldehyde acetonide
Fraisse, Pierre,Hanna, Issam,Lallemand, Jean-Yves,Prange, Thierry,Ricard, Louis
, p. 11819 - 11832 (1999)
The aldol reaction between methyl (methyl-3-O-benzyl-2-O-methoxymethyl- α-D-xylofurano-side)uronate and D-(R)-glyceraldehyde acetonide, promoted by cerium(III) chloride, led to three diastereoisomers in good yield and high level of stereoselectivity at the newly created quaternary center of the furanoside. Under acidic conditions, the aldol derivatives undergo transketalization to afford different bicyclic ketal isomers. This reaction was used as the key step in the synthesis of a functionalized bicyclic core of the zaragozic acids.
A short synthesis of the bicyclic core of the zaragozic acids
Fraisse, Pierre,Hanna, Issam,Lallemand, Jean-Yves
, p. 7853 - 7856 (2007/10/03)
A synthesis of the highly functionalized bicyclic core of the zaragozic acids is described, in which the key step involves the construction of the C4 quaternary carbon center by a CeCl3-promoted aldol reaction between the α- D-xylofuranuronic acid derivative 2 and D-(R)-glyceraldehyde acetonide.