Metal-free one-pot synthesis of 2-substituted benzimidazoles from N-aryl imines and TMSN3

Silver molybdate (Ag‐PMo12) nanocomposite: An efficient catalyst for the one‐pot synthesis of 3,3‐diindolyl derivatives in aqueous medium

“…In this context, modified phosphomolybdic acid nanocomposites are introduced as an inexpensive and non‐hazardous heterogeneous catalyst for the preparation of various highly functionalized heterocyclic compounds [9] . Very recently, our research group has developed an efficient cross‐dehydrogenative coupling (CDC) using Cu‐PMo 12 catalyst for the synthesis of novel pyrimidinyl carbamate compounds under mild conditions [10] . With the continuation of our research development of simple and practical synthetic methods, [11] we have synthesized an effective silver‐supported heterogeneous catalyst (Ag‐PMo 12 ) for the condensation reactions of isatin and indoles providing the 3,3‐di(indolyl)oxindoles in aqueous medium and at room temperature (Scheme 1).…”

“…[9] Very recently, our research group has developed an efficient cross-dehydrogenative coupling (CDC) using Cu-PMo 12 catalyst for the synthesis of novel pyrimidinyl carbamate compounds under mild conditions. [10] With the continuation of our research development of simple and practical synthetic methods, [11] we have synthesized an effective silver-supported heterogeneous catalyst (Ag-PMo 12 ) for the condensation reactions of isatin and indoles providing the 3,3-di(indolyl)oxindoles in aqueous medium and at room temperature (Scheme 1). Remarkably, the one-pot reaction allows the promising catalytic activity of the silver nanocomposite for the direct synthesis of indole derivatives in excellent yields and under environment benign conditions.…”