Synthesis and conversion reactions of alkenyl- and hydride siloxanes
作者:K.A. Andrianov、V.I. Sidorov、L.M. Khananashvili
DOI:10.1016/s0022-328x(00)80325-3
日期:1965.11
organosiloxanes containing the vinyl group in the α- and β-positions, with diazomethane and phenyl azide have been studied. It is concluded that siloxanes containing the vinyl group in the α-position react with diazomethane and phenyl azide but not siloxanes with the vinyl group in the β-position. The 1-pyrazolin-3-yl derivatives of organosiloxanes formed decompose when heated yielding the corresponding
Combinatorial Approach to the Catalytic Hydrosilylation of Styrene Derivatives: Catalyst Systems Composed of Organoiron(0) or (II) Precursors and Isocyanides
(COT)2Fe and the open ferrocenes (MPDE)2Fe (MPDE = η5-3-methylpentadienyl) and (DMPDE)2Fe (DMPDE = η5-2,4-dimethylpentadienyl) were found to function as catalyst precursors for the hydrosilylation of alkenes in the presence of auxiliary ligands. Screening trials determined that the optimal catalyst system was composed of (COT)2Fe and adamantyl isocyanide, allowing the selective hydrosilylation of styrene
Diverse Fates of β-Silyl Radical under Manganese Catalysis: Hydrosilylation and Dehydrogenative Silylation of Alkenes
作者:Xiaoxu Yang、Congyang Wang
DOI:10.1002/cjoc.201800367
日期:2018.11
Manganese‐catalyzed hydrosilylation of alkenes has been underdeveloped for a long time. Herein, we describe a general, chemo‐ and regio‐ selective hydrosilylation of alkenes by using the Mn(CO)5Br catalyst with ample substrate scopes. Meanwhile, dehydrogenative silylation of aryl olefins can be selectively achieved upon the catalysis of dinuclear Mn2(CO)10. Mechanistic experiments revealed diverse
Platinum(II) Complexes with Thioether-Functionalized Benzimidazolin-2-ylidene Ligands: Synthesis, Structural Characterization, and Application in Hydroelementation Reactions
作者:Jan C. Bernhammer、Han Vinh Huynh
DOI:10.1021/om400929t
日期:2014.1.13
obtain the platinum(II) complexes by direct reaction between ligand precursors and basic platinum salts, the mild silver carbene transfer reaction gave the desired complexes in all cases. X-ray crystallography confirmed the expected κ2C,S coordination mode of the benzimidazolin-2-ylideneligands, with a cis arrangement of the carbene and the hemilabile thioether moieties in all complexes. Preliminary
Disclosed herein is the use of manganese, iron, cobalt, or nickel complexes containing tridentate pyridine di-imine ligands as hydrosilylation catalysts. These complexes are effective for efficiently catalyzing hydrosilylation reactions, as well as offering improved selectivity and yield over existing catalyst systems.