Synthesis of Optically Active α-Alkylidene-β-hydroxy-γ-methylenebutyrolactones. Isoobtusilactones and Isomahubalactones (Isomahubanolide and Isomahubenolide)
ω-ethyl, ω-ethenyl and ω-ethynyl-α-alkylidene-γ-lactones from Clinostemon mahuba
作者:C. Juan、V. Martinez、Massayoshi Yoshida、Otto R. Gottlieb
DOI:10.1016/s0031-9422(00)84166-7
日期:1981.3
Synthesis of Optically Active α-Alkylidene-β-hydroxy-γ-methylenebutyrolactones. Isoobtusilactones and Isomahubalactones (Isomahubanolide and Isomahubenolide)
The title compounds were prepared via stereoselective aldol reaction of α,β-unsaturated carboxylate α-anion equivalent, derived from optically active α-(arylsulfinyl)carboxylate and bromomagnesium diisopropylamide, with propargyl aldehyde as a key step.