Untersuchungen zum Reaktionsverhalten von Benzocyclopropen unter Yb(fod)3‐Katalyse

Experiments Concerning the Reactions of Benzocyclopropene under Yb(fod)3 Catalysis 1,3‐Dihydroisobenzofuran derivatives 3a – e and 5a – c are obtained by reactions of α,β‐unsaturated carbonyl compounds with benzocyclopropene (1). The yields increase by addition of Yb(fod)3. Aromatic aldehydes react in the same way. Yb(fod)3 has no influence on the reactions of α,β‐unsaturated hydrazones with 1.