Title Rasta resin-PPh3BnCl and its use in chromatography-freecarbonyl cyanosilylation reactions

Abstract: Rasta resin-PPh3BnCl, a new heterogeneous polysty-rene-based phosphonium salt, has been synthesized and used to catalyze cyanosilylation reactions of aldehydes and ketones. It was found to be more efficient as a catalyst than a similar hetero-geneous phosphonium salt anchored onto a polystyrene based on the Merrifield resin architecture of 2 % divinylbenzene cross-linking. In these reactions rasta resin-PPh3BnCl was separated from the desired reaction product simply by filtration, and it could be reused without significant loss of catalytic activity numerous times