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Hydrosilylation of 1-alkynes with PhMeSiH2 andPh2SiH2 catalyzed by a highly active rhodiumspecies, generated in situ from rhodium under an atmospheric ofcarbon monoxide gave only (E)-vinylsilanes in excellent yield(>90%). In the absence of carbon monoxide, no reaction wasobserved under the same reaction conditions. Our Rh/CO catalytic systemleads to the (E)-stereoselectivity exclusively, while...
Ultrasound accelerates the N-alkylation of pyrrole by alkylating reagents using potassium superoxide as base in the presence of 18-crown-6. A much lower yield of N-alkylated pyrrole was realized in the absence of ultrasound. N-alkylating reagents employed for pyrrole are methyl iodide, ethyl bromide, benzyl bromide, as well as acrylonitrile allyl cyanide and methyl acrylate. In an extension of...
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