Mesoporous Silica-Supported Sulfonyldiamine Ligand for Microwave-Assisted Transfer Hydrogenation

Scheme 1

Preparation of the SBA-15-supported N-sulfonyldiamine 3. (i) 2-(4-Chlorosulfonylphenyl)ethyltrimethoxysilane, triethylamine, CH₂Cl₂  −10°C to room temperature, 2 h; (ii) SBA-15, toluene, 105°C, 18 h.