Dicationic copper(i) complexes bearing ENE (E = S, Se) pincer ligands; catalytic applications in regioselective cyclization of 1,6-diynes

Abstract

Two novel dicationic binuclear Cu(I) complexes of the type [{(BPPP)E2)}Cu]2[BF4]2 (E = S (3a); Se (3b)) bearing (BPPP)E2 (BPPP = bis(diphenyl phosphino)pyridine) pincer systems were isolated, and structurally characterized. The...

New cationic coinage metal complexes featuring silyl group functionalized phosphine: syntheses, structures and catalytic studies in alkyne–azide cycloaddition reactions

“…The first set of triazoles 7a–7r was achieved in 70–99% isolated yields. In the second set of five triazoles, 8a–8e 39 bearing alkyl-phenyl propargylic ether groups were prepared by employing a series of azides (benzyl azide, tolylazide, and carbazolyl azides) and terminal-internal alkynes as coupling partners (Table 3). It should be noted that, triazoles 8a–8d are yellow viscous compounds, whereas 8e is solid in nature at room temperature.…”