reusable

Synthesis Green chemistry Amine Catalyst Enantioselective one-pot synthesis Aldehyde Thiourea Nafion SAC-13 heterogeneous O-silylation solvent-free conditions product yields catalyst recycling Benzoxanthene derivatives Preparation Application Encapsulation Alkyne Heterogeneous and Reusable Catalyst Activation of HMDS Efficient and Selective O-silylation Reactions Highly Efficient Bifunctional Nitro-Michael reaction Recoverable 4-aminoquinazolines Heteropolyacid TBAPIL Si(CH2)3 Nano-silica Nano-catalyst Copper(I)-Schiff base complex NaY nanoporosity A ³-coupling