Hydrovinylation of 1,3-Dienes

Significance

Although the asymmetric hydrovinylation of 1,3-cyclohexadiene has been reported, the use of a complex azaphospholene ligand or the use of Et₂AlCl is necessary. This protocol does not require the highly Lewis-acidic Et₂AlCl and uses the simple ligand 1. While a major portion of this report pertains to the hydrovinylation of va­rious 1,3-dienes in a racemic, but regioselective manner, the authors do include a few asymmetric variants. All reactions give high conversion (>99% in most cases) and very high regioselectivity (>95% in most cases).