Metalation of methallylbenzenes with BuLi gave dilithio derivatives which were dialkylated with methyl bromide. Derivatives of cross conjugated dianions are obtained preferentially to linear ones. The parent trimethylenemethane dianion2 was obtained by metalation of isobutene. Energies and atomic net charges of these and related molecules were calcualted. The question of the aromaticity of these systems
Palladium-Catalyzed Carbonyl Allylation of Aldehydes by Allylic Cyclic Carbonates
作者:Suk-Ku Kang、Dong-Chul Park、Chan-Hee Park、Su-Bum Jang
DOI:10.1080/00397919508013837
日期:1995.5
Palladium(O)-catalyzed allylation of aldehydes by allylic cyclic carbonates with SnCl2 proceeded smoothly to afford 1,3-diols with high diastereocontrol. For the exomethylene cyclic carbonate, allylation with aldehydes furnished 1,4-diols or 1,5-diols depending on amount of aldehydes.
Chao-Jun Li, Tetrahedron Lett, 36 (1995) N 4, S 517-518
作者:Chao-Jun Li
DOI:——
日期:——
Trimethylenemethane dianion equivalent in aqueous medium
作者:Chao-Jun Li
DOI:10.1016/0040-4039(94)02299-q
日期:1995.1
Via an indium mediated Barbier-type reaction in aqueous medium, carbonyl compounds react with a trimethylenemethanedianion equivalent to give the corresponding diols.