hide
Free keywords:
REDUCTIVE ELIMINATION-REACTIONS; PROMOTED OXIDATIVE ADDITION; LEWIS-ACID; METAL-COMPLEXES; CATALYZED HYDROSILYLATION; ORGANOSILICON CHEMISTRY; HOMOGENEOUS CATALYSIS; NICKEL-COMPLEXES; HYDROSILATION; PALLADIUM
Abstract:
Selective 1,2-hydrosilylation of 1,3-dienes is a challenging problem in transition metal catalysis. Butadiene, specifically, would be a useful substrate because 3-butenylsilane products have promise as superior coupling reagents for hybrid organic/inorganic materials synthesis. We report the first selective 1,2-hydrosilylation of conjugated dienes including butadiene. Hydrosilylation proceeds through a Pt(II/IV) cycle, and selectivity is generated at a hexacoordinate Pt(IV) complex that favors eta(2)-diene coordination and prevents pi-allyl complex formation.