Highly Regio- and Stereoselective Ring-Opening Reaction of γ-Alkenyl-γ-butyrolactones with Allylsilanes in the Presence of Trimethyloxonium Salt Leading to Methyl 4,8-Alkadienoates
Highly Regio- and Stereoselective Ring-Opening Reaction of γ-Alkenyl-γ-butyrolactones with Allylsilanes in the Presence of Trimethyloxonium Salt Leading to Methyl 4,8-Alkadienoates
Highly regio- and stereoselective ring-opening reaction of γ-alkenyl-γ-butyrolactones using allylsilanes-trimethyloxonium salt to afford methyl (e)-4,8-alkadienoates
Highly Regio- and Stereoselective Ring-Opening Reaction of γ-Alkenyl-γ-butyrolactones with Allylsilanes in the Presence of Trimethyloxonium Salt Leading to Methyl 4,8-Alkadienoates
作者:Masatoshi Kawashima、Tamotsu Fujisawa
DOI:10.1246/bcsj.61.4051
日期:1988.11
The reaction of γ-alkenyl-γ-butyrolactones with allylic trimethylsilanes in the presence of trimethyloxonium tetrafluoroborate proceeded regio- and stereoselectively with an allylic rearrangement of the substrate to afford methyl (E)-4,8-alkadienoates in high yields. On the other hand, the ring opening of 4-hexen-6-olide afforded exclusively methyl (Z)-4,8-alkadienoates in high yields. The synthetic utility of the reaction was demonstrated by the short step synthesis of β-sinensal and β-farnesene.