Rapid access to the synthesis of polysubstituted δ-lactones via tandem stereoselective conjugate addition/α-alkylation of unsaturated 7,3-lactone-α-d-xylofuranose derivative
2013
Abstract α- d - xylo -7,3-Unsaturated lactone, a versatile chiral building block, undergoes Cu-catalyzed conjugated addition with high yield and stereoselectivity. When the conjugated reaction is quenched with a suitable alkyl halide, a tandem stereoselective conjugated/α-alkylation reaction is achieved. Further, selective hydrolysis of the 1,2- O -isopropylidene moiety followed by oxidative cleavage and reduction reaction, afforded the title compounds.
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