74493-48-4Relevant articles and documents
Studies on New Synthetic Pathways to Δα,β-Butenolides from α-Methylbutanolides. III. Regiospecific Preparation of α-Methyl-Δα,β-butenolides and α-Methylene-γ-butyrolactones by Electrolysis of α-Carboxy-α-methylbutanolides and by Oxid
Inayama, Seiichi,Kawamata, Takeshi,Shimizu, Nobuko (nee Ohizumi)
, p. 282 - 287 (2007/10/02)
New methods have been developed for the preparation of α-methylene-γ-butyrolactones (exo-type olefin) and α-methyl-Δα,β-butenolides (endo-type olefin) starting from an α-carboxy-α-methyl-γ-butyrolactone in a fused lactone system, e.g., (+)-11β-