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Silica-anchored organotin trichloride: a recyclable and clean organotin catalyst for transesterification reactions

Journal Contribution - Journal Article

A new synthetic scheme towards silica-supported organotrichlorotin derivatives has been developed. It involves the synthesis of (11-triethoxysilyl)undecyltricyclohexyltin, followed by sol–gel processing and, subsequently in the formation of the resulting hybrid silica, by electrophilic substitution of the tricyclohexyltin function by the target grafted trichlorotin using tin tetrachloride. HR-MAS 119Sn and CP-MAS 29Si NMR combined with N2-sorption and TEM measurements evidenced the formation of a mesoporous organic–inorganic hybrid silica including a functionally pure supported-organotrichlorotin species. This silica-grafted organotrichlorotin displays a satisfactory catalytic activity in the transesterification of ethyl acetate by 1-octanol. The catalyst could be recycled four times without significant loss of activity. Furthermore, tin leaching below 10 ppm evidences the benefits of the proposed strategy to limit tin contamination of the final products.
Journal: Dalton Transactions
ISSN: 1477-9226
Issue: 26
Volume: 42
Pages: 9764-9770
Publication year:2013
Keywords:organotin catalyst, transesterification
  • WoS Id: 000320246200044
  • Scopus Id: 84881040469