Stereoselective synthesis of β-lactones containing α-Z-alkoxycarbonylmethylene chains by palladium-catalysed oxidative carbonylation of tertiary α-hydroxyalkynes
作者:Bartolo Gabriele、Mirco Costa、Giuseppe Salerno、Gian Paolo Chiusoli
DOI:10.1039/c39940001429
日期:——
Tertiary α-hydroxyalkynes undergo oxidative carbonylation in alcohols in the presence of catalytic amounts of Pdl2âKl to give β-lactones derived from alkoxycarbonylation at the terminal cabon of the alkyne and cis-carbonylation at the internal carbon, followed by carbonyl trapping by the tertiary hydroxy group.
Some γ-butyrolactone derivatives have been synthesized by the reaction of dimethyl maleate with carbonyl compounds in the presence of active zinc compound.