Coscia, Rockford W. published the artcileDevelopment of a formal [4 + 1] cycloaddition: Pd(OAc)2-catalyzed intramolecular cyclopropanation of 1,3-dienyl ¦Â-keto esters and MgI2-promoted vinylcyclopropane-cyclopentene rearrangement, COA of Formula: C15H15OP, the publication is Journal of the American Chemical Society (2009), 131(7), 2496-2498, database is CAplus and MEDLINE.
A formal [4 + 1]-cycloaddition of 1,3-dienyl ¦Â-keto esters has been developed. This two step process involves Pd(II)-catalyzed intramol. cyclopropanation to produce vinylcyclopropanes, e.g., I, and a subsequent mild vinylcyclopropane-cyclopentene rearrangement promoted by MgI2. The cyclopropanation method notably requires the use of Mg(ClO4)2, presumably to facilitate keto-enol tautomerization, and is greatly improved by the use of copper(II) isobutyrate as co-oxidant. A range of substrates with various substitution patterns is demonstrated.
Journal of the American Chemical Society published new progress about 4141-48-4. 4141-48-4 belongs to catalysis-chemistry, auxiliary class Aryl phosphine ligand,Mono-phosphine Ligands, name is Allyldiphenylphosphine oxide, and the molecular formula is C15H15OP, COA of Formula: C15H15OP.
Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia