Oxidative Isomerization of Vinylidenecyclopropanes to Dimethylenecyclopropanes and Brønsted Acid-Catalyzed Further Transformation
作者:Bei-Li Lu、Min Shi
DOI:10.1002/ejoc.201001484
日期:2011.1
Oxidative isomerization of vinylidenecyclopropanes 1 produces dimethylenecyclopropane aldehydes 2 in moderate to good yields using tetrapropylammonium perruthenate (TPAP)/4-methylmorpholine N-oxide (NMO) as a catalytic system and the obtained dimethylenecyclopropanes 3 can be transformed to indene derivatives smoothly in the presence of Bronsted acid (HOTf). The scope and limitations as well as the