Tetrahedron Letters

Preparation et reactivite du derive lithie issu du dioxolanne du-ceto pentanoate de trimethylsilyle.

JL Moreau, R Couffignal

Index: Moreau, Jean Louis; Couffignal, Rene Tetrahedron Letters, 1982 , vol. 23, # 50 p. 5271 - 5274

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Citation Number: 1

Abstract

Résumé The organolithium reagent 4 issued from trimethylsilyl 4, 4-ethylendioxypentanoate 3 reacts with ketones; it affords β-hydroxy-acids 7 and β-ethylenic ketones 8. This reaction is an efficient route for carbonyl olefination. 4 also acts towards mixed carboxylic and carbonic anhydrides as a homoenolate equivalent.