Hydrosilylation solid support catalysts

The impressive results obtained by chiral titanocenes derivatives are balanced by the quite tedious synthesis of the precursors. Thus, methods allowing the reuse of the catalyst are highly desirable, and their immobilisation on solid supports would be a solution. It should be noticed that tethered a/zsa-bridged titanocenes were immobilised on 3-mercaptopropyl-functionalised silica gel, and showed good aetivity in hydrosilylation of imines with minimal leaching. Unfortunately, since the catalysts studied were a racimeso mixture, the performance of this eatalytic system in terms of enantioselectivity is as yet unknown. 

---