Dehydrogenative Coupling Of Hydrosilanes Research Articles

Organocalcium Complex‐Catalyzed Dehydrogenative Coupling of Hydrosilanes with Terminal Alkynes

AbstractAlkynylsilanes are an important class of organic compounds and dehydrogenative coupling of hydrosilanes with terminal alkynes provides a convenient and simple route to alkynylsilanes. On the other hand, calcium is an abundant, biocompatible, and environmentally friendly element and using organocalcium complexes as catalytic reagents in organic synthesis recently attracted increasing attentions. Here we report an organocalcium complex‐catalyzed dehydrogenative coupling of hydrosilanes with terminal alkynes. With a calcium alkyl complex [LCaCH2SiMe3] (L=[MeC(NDipp)CHC(tBu)NCH2CH2N(Me)CH2CH2NMe2]−, Dipp=2,6‐(iPr)2C6H3) as the catalyst, the reactions of n‐HexSiH3 with terminal alkynes provide trialkynylsilanes and those of Et2SiH2 with terminal alkynes give monoalkynylsilanes efficiently.

Dehydrogenative Coupling of Hydrosilanes and Alcohols by Alkali Metal Catalysts for Facile Synthesis of Silyl Ethers

Cross-dehydrogenative coupling (CDC) of hydrosilanes with hydroxyl groups, using alkali metal hexamethyldisilazide as a single-component catalyst for the formation of Si–O bonds under mild condition, is reported. The potassium salt [KN(SiMe3)2] is highly efficient and chemoselective for a wide range of functionalized alcohols (99 % conversion) under solvent-free conditions. The CDC reaction of alcohols with silanes exhibits first-order kinetics with respect to both catalyst and substrate concentrations. The most plausible mechanism for this reaction suggests that the initial step most likely involves the formation of an alkoxide followed by the formation of metal hydride as active species.

Dehydrogenative Coupling of Hydrosilanes with Amines Using Au/HAP

Key words hydrosilanes - amines - amides - gold nanoparticles - hydroxyapatite - heterogeneous catalysis

Correction: Palladium nanoparticles supported on graphene as catalysts for the dehydrogenative coupling of hydrosilanes and amines

Correction for ‘Palladium nanoparticles supported on graphene as catalysts for the dehydrogenative coupling of hydrosilanes and amines’ by Hermenegildo Garcia et al., Catal. Sci. Technol., 2015, DOI: 10.1039/c4cy01486c.

ChemInform Abstract: Synthesis and Properties of Polysilanes: Versatile New Organic Materials

The most important synthetic methods including the Wurtz reaction, the activated alkali metal mediated reductive coupling, the electrochemical polymerization of dichlorosilanes using sacrificial anodes, the anionic ring-opening polymerization of tetrasilacyclobutanes and of masked disilenes, and the transition metal (Ti, Zr, Hf) catalyzed dehydrogenative coupling of hydrosilanes are briefly overviewed. A short discussion of the thermal and electronic properties of polysilanes allows for anticipating respectively their excellent processability and their technological applications. Among the latter, the most important ones appear to be microlithography for electronics, manufacture of light-emitting diodes (LEB) for various display devices, and fabrication of high tensile strength silicon carbide fibers, as well as heat resistant machineable objects. Other promising potential applications in optoelectronics are based on the interesting nonlinear optical (NLO) and photoconductive properties of suitably substituted polysilanes.