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Mechanistic aspects of the reaction of some phosphonium ylides with alkyl propynoates.

✍ Scribed by Jose Barluenga; Fernando Lopez; Francisco Palacios; Francisco Sánchez-Ferrando

Publisher
Elsevier Science
Year
1988
Tongue
French
Weight
235 KB
Volume
29
Category
Article
ISSN
0040-4039

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✦ Synopsis

The reaction of alkoxycarbonylmethylentriphenylphosphonium ylides 1 with alkyl propynoates 2 in dichlormethane proceeds via [2+2]cycloaddition rather than Michael addition, to lead to stabilised phosphonium ylides.

In the course of our investigations into the reactivity of acetylendicarboxilic acid esters 2 with phospha-x 5 -azenes' 1 and the related iso-

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