Abstract
AbstractOxidative 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 Brønsted acid (HOTf). The scope and limitations as well as the plausible mechanisms have been discussed.
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