Reactivite du derive lithie issu du dioxolanne du levulate de trimethylsilyle vis-a-vis des derives carbonyles: Une methode directe d'olefination des aldehydes aromatiques et des cetones
作者:Jean-Louis Moreau、René Couffignal
DOI:10.1016/0022-328x(85)80391-0
日期:1985.12
At −60°C and in ether, the organolitium reagent produced by trimethylsilyl 4,4-ethylenedioxypentanoate reacts with aldehydes and ketones, and gives the expected β-hydroxyacids. The β-ethylenic ketones are isolated when the condensation is carried out with aromatic aldehydes and ketones. This proves to be an efficient route for carbonyl olefination.
在-60°C和在乙醚中,由4,4-乙烯二氧戊酸三甲基甲硅烷基酯制得的有机锂试剂与醛和酮反应,得到预期的β-羟基酸。当与芳族醛和酮进行缩合时,分离出β-乙烯酮。事实证明,这是进行羰基烯化的有效途径。