Enhanced Photostability of a Ruthenium(II) Polypyridyl Complex under Highly Oxidizing Aqueous Conditions by Its Partial Inclusion into a Cyclodextrin
作者:Pau Farras、Helen Waller、Andrew C. Benniston
DOI:10.1002/chem.201503485
日期:2016.1.18
The complex [Ru(bpy)2L]2+, where bpy=2,2′‐bipyridine, L=4‐(phenylethynyl)‐2,2′‐bipyridine, was prepared in its racemic and resolved forms (Δ and Λ). The phenylethynyl unit on the bipyridine for the complex acts as a binding site for α‐cyclodextrin in water (1:1 complex, K=3390 L mol−1) or β‐cyclodextrin (2:1 complex, K1=887 L mol−1, K2=8070 L mol−1). The presence of the cyclodextrin provides partial
An efficient Sonogashira coupling of a heterocyclic phosphonium salt with a terminalalkyne via C–P bond cleavage was developed. The reactions proceeded smoothly in the presence of palladium catalyst, copper(I) iodide, and N,N-diisopropylethylamine (DIPEA) in N-methyl-2-pyrrolidone (NMP) at 100 °C for 12 h, producing the corresponding alkynyl-substituted pyridine, quinoline, pyrazine, and quinoxaline