Abstract
A new silylation agent, N-methyl-N-(trimethylsilyl) trifluoroacetamide (MSTFA), has been employed for the trimethylsilylation of Ti-MCM-41. The FT-IR spectra revealed that the hydrophobic trimethylsilyl group, –Si(CH3)3, in MSTFA can replace the hydrogen in the silanol at room temperature. By virtue of their high volatility, MSTFA and its derivative, N-methyl trifluoroacetamide, can be readily removed after silylation. The MSTFA silylated Ti-MCM-41 is found to be more hydrophobic than that silylated by BSTFA and to bring about a significant enhancement in the yield of epoxide from cyclohexene epoxidation with aqueous H2O2.
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Bu, J., Rhee, HK. Improvement in hydrophobicity of Ti-MCM-41 using a new silylation agent MSTFA. Catalysis Letters 65, 141–145 (2000). https://doi.org/10.1023/A:1019096617082
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DOI: https://doi.org/10.1023/A:1019096617082