Reaktionen von Vinylketonen mit stabilisierten Phosphoniumyliden

HJ Bestmann, A Groß

Index: Bestmann, Hans Juergen; Gross, Andreas Tetrahedron Letters, 1997 , vol. 38, # 27 p. 4765 - 4768

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Citation Number: 21

Abstract

Zusammenfassung Acylphosphoniumylids 1 react with vinylketones 2 under formation of 1- acyl-4-oxolids 3. In the reaction of carboalkoxytriphenylphosphoranes 4 with 2 two reaction pathways occur. In polar solvents again a Michael-addition gives the phosphoranes 6, whereas in nonpolar solvents a quasimethathesis-reaction leads to acrylic esters 9 and the acylphosphoranes 1. By 1 O 2 3 and 6 are oxidized to give the tricarbonyl-compounds 10 ...