No abstract

Cationic rhodium complex-catalysed hydrosilylation of alk-l-ynols including propynylic alcohols with triethylsilane is highly selective to give (a-l -triethylsilyl alk-1 -enols as products in excellent yields.Neutral rhodium complex-catalysed hydrosilylation of alk-lynes gives (2)-vinylsilanes as the major product via the trans addition of Si-H across the carbon-carbon triple bond.1 In contrast to the extensive amount of the work on the neutral rhodium complex-catalysed hydrosilylation of alk-l-ynes, catalysis by cationic rhodium complexes has not been reported. In the course of the study of solvent effects on hydrosilylation, we noticed reversal of stereoselectivity for cationic rhodium complex catalysis, i. e. cationic rhodium complex-catalysed hydrosilylation of hex-l-yne with triethyl-

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ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.