Tetrahedron

Etude des petits cycles—XLII: Synthese des α-cyclopropylidene-cetones et aldehydes11Pour une publication préliminaire voir Ref. 1.

A Lechevallier, F Huet, JM Conia

Index: Lechevallier, A.; Huet, F.; Conia, J. M. Tetrahedron, 1983 , vol. 39, # 20 p. 3307 - 3316

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Citation Number: 13

Abstract

Cyclopropylidenation of α-keto-or α-formyl acetals by Witting reaction with cyclopropylidenetriphenyl-phosphorane leads to α cyclopropylidene-acetals, easily deacetalized by moist silicagel into the corresponding α-cyclopropylidene-ketone and α- cyclopropylidene-aldehydes. The conversion of the latter to the former is also easily carried out by reaction with Grignard reagents followed by oxidation with active manganese ...