Using highly electron-rich monophosphine ligands, Suzuki cross-coupling of heteroaromatic chlorides with various boronic acids was carried out in high yields. High yields were also often observed when steric heteroaromatic chlorides were employed in Suzukicross-couplingreactions. Suzuki coupling - ClickPhos - heteroaromatic chlorides - palladium
A highly selectivecopper-catalyzed concise synthesis of 3,5-diarylpyridine and 2-(1H)-pyridone has been achieved through cascade Chichibabin-type cyclization, C(sp3)–C(sp3) cleavage, and aerobicoxidation. Azide, ceric ammonium nitrate (CAN), and 2-aminopyridine are disclosed as efficient nitrogen donors in this Cu-catalysis using O2 as the oxidant. Water and molecular oxygen were employed as the
bond participation in annulation to pyridines usingN,N-dimethylformamide (DMF) as the N1 and C4 synthons has been carried out. In this reaction, DMF contributed one N atom and one C atom to two disconnected positions of pyridine ring, with no need for an additional nitrogen source. Two C═C bonds in two molecules of substituted styrenes offered four carbon atoms in the presence of iodine and persulfate