Stereocontrolled entry to 2,5-disubstituted tetrahydrofurans from hex-2-enono-δ-lactones under mild conditions
摘要:
A stereospecific route to highly functionalized 2,5-disubstituted tetrahydrofuran derivatives from readily available 6-O-silylated-hex-2-enono-delta-lactones is reported. The protocol involves an efficient Michael type O-heterocyclization reaction followed by selective ring openig of the lactone moiety.