New olefin synthesis from carbonyl compounds and diethyl sodiophosphonate
Abstract
Reaction of aromatic aldehydes and phthalic and thiophthalic anhydrides with diethyl sodiophosphonate leads to trans-stilbenes, and to 3,3′-biphthalidylidene and 3,3′-bis-(2-thiophthalidylidene); reactions using N-methylisatoic anhydride and N-methylisatin as carbonyl compounds give NN′-dimethylisoindigo.
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