Synthesis of Organofunctionalized Silica Gel from Organostannylated Silica Gel and Chlorosilane

Tri- and dibutylstannylated silica gels were prepared from water glass and tri- and dibutyltinoxide, respectively. Organofunctionalized silica gels were readily formed via reaction between the tri- and dibutylstannylated silica gels and acetoxyethyldimethylchlorosilane or acetoxyethylmethyl-dichlorosilane with the elimination of organotin groups. It was demonstrated that the organic groups were more effectively introduced in the stannylated silica gels than in non-stannylated silica gels.