Cooperative Catalytic Activation of Si−H Bonds: CO2‐Based Synthesis of Formamides from Amines and Hydrosilanes under Mild Conditions. Issue 6 (20th December 2016)

• Record Type: Journal Article
• Authors: Luo, Rongchang; Lin, Xiaowei; Chen, Yaju; Zhang, Wuying; Zhou, Xiantai; Ji, Hongbing
• Is Part Of: ChemSusChem. Volume 10:Issue 6(2017)
• Page Start: 1224
• Page End: 1232
• Publication Date: 2016-12-20
• Subjects: carbon dioxide -- cooperative catalysis -- ionic liquid -- formylation -- salen zinc; Green chemistry -- Periodicals; Sustainable engineering -- Periodicals; Chemistry -- Periodicals; Chemical engineering -- Periodicals; 660
• DOI: 10.1002/cssc.201601490
• Languages: English
• ISSNs: 1864-5631

Abstract

Abstract: A simple cooperative catalytic system was successfully developed for the solvent‐free N ‐formylation of amines with CO2 and hydrosilanes under ambient conditions, which was composed of a Zn(salen) catalyst and quaternary ammonium salt. These commercially available binary components activated the Si−H bonds effectively, owing to the intermolecular synergistic effect between Lewis base and transition metal center (LB–TM), and subsequently facilitated the insertion of CO2 to form the active silyl formats, thereby leading to excellent catalytic performance at a low catalyst loading. Furthermore, the bifunctional Zn(salen) complexes, with two imidazolium‐based ionic‐liquid (IL) units at the 3, 3′‐position of salen ligand, acted as intramolecularly cooperative catalysts, and the solvent‐regulated separation resulted in facile catalyst recycling and reuse. Abstract : Formylation with CO2 : The reductive N ‐formylation of amines to produce formamides with CO2 and hydrosilanes under ambient conditions is catalyzed by Zn(salen) complexes with inter‐ or intramolecular ionic‐liquid moieties.