137. Enol Acetal Synthesis through Carbenoid C—H Insertion into Tetrahydrofuran Catalyzed by CpRu Complexes
     Cecilia Tortoreto, Thierry Achard, Walid Zeghida, Martina Austeri, Laure Guénée, Jérôme Lacour
     Angew. Chem. Int. Ed. 2012, 51, 5847-5851

[CpRu(CH₃CN)₃][PF₆] and diimine ligands catalyze the decomposition of α-diazo-β-ketoesters in THF leading to original products of 1,4-C−H insertion. In contrast with previous results, only novel enol-acetal motifs are obtained through intermolecular C-O instead of C-C bond forming reactions.

DOI : 10.1002/anie.201201541 

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