C2-Symmetric bis-thioglycosides as new ligands for palladium-catalyzed allylic substitutions
作者:Noureddine Khiar、Cristina S Araújo、Eleuterio Alvarez、Inmaculada Fernández
DOI:10.1016/s0040-4039(03)00568-9
日期:2003.4
A new divergent design for the synthesis of optically pure bis-thioglycoside type I is reported. In only two steps a common chiral intermediate with up to eight free alcohols: two primary and six secondary is obtained. From this common intermediate a large number of ligands can be synthesized. A positional scanning like strategy has permitted the rapid discovery of an efficient catalyst for the palladium-catalyzed
Sulfur–Sulfur-Based Ligands Derived fromD-Sugars: Synthesis of PdII Complexes, Application in Palladium-Catalyzed Allylic Alkylation for the Synthesis of Both Members of Enantiomer Pairs, and Structural Studies
A divergent synthetic approach for the synthesis of opticallypure bis(thioglycosides) of type I is reported. A common chiral intermediate with up to eight free hydroxy groups is obtained in only two steps, and from this common intermediate a large number of ligands can be synthesized. A strategy resembling positional scanning enabled the rapid discovery of an efficient catalyst for the palladium-catalyzed
Highly diastereoselective formation of C<sub>2</sub>-symmetric bis-thioglycoside Pd(<scp>ii</scp>) complexes: the role of the exo anomeric effect
作者:Noureddine Khiar、Cristina S. Araújo、Bélen Suárez、Eleuterio Alvarez、Inmaculada Fernández
DOI:10.1039/b313798h
日期:——
Treatment of several C2 symmetric bis-thioglycosides with Pd(CH3CN)2Cl2 always leads to a single diastereomeric Pd(II) complex as a consequence of the exo-anomeric effect.