Synthetic Usefulness of the Cobalt(I)-Mediated Ene Type Reaction for the Diastereoselective Construction of Bicyclo[n.3.0]derivatives

Abstract
Cobalt(I)-catalyzed cycloisomerization of cyclic ℇ-acetylenic β-ketoesters 1 led to bicyclo[n.3.0]derivatives 2 in high yield and with a total stereocontrol of two contiguous centers.

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