Addition of nitrile oxides to germyl-substituted ethylenes
作者:E Lukevics、P Arsenyan、S Belyakov、J Popelis
DOI:10.1016/s0022-328x(98)00419-7
日期:1998.5
The reactions of [2+3] cycloaddition of nitrileoxides to mono- and 1,2-disubstituted germylalkenes proceed regioselectively and resulted 5-Ge-substituted isoxazolines-2 from triethylvinyl- and triethylallylgermane and 4-Ge-isomers from β-triorganylgermylstyrene and ethyl triorganylgermylacrylates. In the latter case the reaction occurs stereospecifically: Z-germylalkenes give cis-, while E-germylalkenes
Mixtures of alkyl esters of 2-triethylsilyl(germyl)- and (E)-3-triethylsilyl(germyl)acrylic acids were obtained by hydrosilylation and hydrogermylation of alkyl esters of propiolic acids. Alkyl esters of organosilicon(germanium) β-amino(hydrazino)propionic acids were obtained by amination of the alkyl esters of 2-triethylsilyl(germyl)acrylic acids.