Platinum-catalysed isomerisations of 1,2-disilylhex-1-enes

Abstract

(E)-2-Butyldimethylsily-1-trimethylsilylhex-1-ene 1 and (E)-1-butyldimethylsilyl-2-trimethylsilylhex-1-ene 4 undergo platinum-catalysed isomerisation reactions with migrations of carbon-carbon double bonds to form (E)-and (Z)-1,2-disilylhex-2-enes at elevated temperatures. The reactions proceed under nitrogen but not under dry air. The structures of the products were determined using 1H, 29Si, two-dimensional 1H-29Si, and selectively decoupled 29Si NMR techniques.