| Abstract
| - PtI2(PPh3)2 catalyzes hydrosilylation of 2,2-diphenyl-1-methylenecyclopropane with HSiEt3, HSiPh3,HSiEt2Ph, HSiPhCl2, and HSiCl3 under solvent-free conditions at 140 °C to produce the silylcompounds with a (2,2-diphenylcyclopropyl)methyl substituent in moderate to high yields withoutring-opening of the substrate. PtI2(PPh3)2 is converted by the reaction into PtH(I)(PPh3)2, whichalso catalyzes the hydrosilylation of the methylenecyclopropanes. The reaction of 2-phenyl-1-methylenecyclopropane, 2-methyl-2-phenyl-1-methylenecyclopropane, 2,2-diphenethyl-1-methylenecyclopropane, and alkylidenecyclopropanes with HSiEt3 catalyzed by PtI2(PPh3)2 causes additionof hydrosilane to the substrate accompanied by ring-opening. 2,2-Diphenyl-1-methylenecyclopropaneundergoes ring-opening isomerization in the presence of HSi(OEt)Me2 and Pt(PEt3)3 catalyst togive 1,1-diphenyl-1,3-butadiene. The pathways for the hydrosilylation and the isomerization arediscussed.
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