Synthesis of Pd(II) large dinuclear macrocyclic complex tethered through two dipyridine-bridged aza-crowns as an efficient copper- and phosphine-free Sonogashira catalytic reaction

Copper-free Sonogashira cross-coupling reactions: an overview

“…Moreover, under this approach, the 1-bromo naphthalene resulted in a satisfactory yield in comparison with aryl bromide (Scheme 72). 131 reported in 2015 by Ibrahim and co-workers. The Sonogashira cross-coupling reactions in the presence of 1 mol% of the Pdbis(oxazoline) complex, Pd-BOX A, using potassium hydroxide, and acetonitrile/water as solvent was achieved at room temperature or 60 C to provide the corresponding products.…”

“…Moreover, under this approach, the 1-bromo naphthalene resulted in a satisfactory yield in comparison with aryl bromide ( Scheme 72 ). 131 …”

Chromogenic detection of xylene isomers and luminogenic chemosensing of o-xylene employing a new macrocyclic cobalt complex: synthesis, and X-ray crystallographic, spectroscopic and computational studies

“…The observed selectivity was credited to the uptake of the favoured guest thanks to C-HÁ Á Áp interactions and size/shape selectivity. 26 In our previous works, [27][28][29] the synthesis of a dibenzo-crown ether macrocyclic ligand with two pyridine side arms (1py) was reported (Fig. 1).…”

“…Pd 2 (1py) 2 Cl 4 was employed as a moisture-/air-stable homogenous catalyst for the Sonogashira cross-coupling reaction in DMSO in the absence of Cu(II) and phosphine ligand. 29 Since we had previously considered using fluorogenic functional groups to investigate the coordination chemistry of aza-crown macrocyclic ligands, [31][32][33][34] in the present study we undertook the synthesis of the naphthalene derivative of 1py as a well-known fluorophore. The new dinaphthodiaza-macrocycle bearing two pyridine side arms (2py) was prepared by considering similar structural changes on the 1py, as a significant class of O 2 N 2 azacrown macrocyclic ligands, since pyridine donor groups as the side arms of aza-crown macrocyclic ligands have been wellknown metal complexing moieties in the past.…”

Macrocyclic copper(II) complexes containing diazacyclam-based ligand: spectral, structural and docking studies

“…MN4 macrocyclic complexes are one special class of non-precious metal catalysts (NPMC) [28]. They are used as new catalysts in modern synthetic organic chemistry [29,30] and also effective catalysts in asymmetric synthesis [31]. Study of the literature revealed that there are various reactions for the synthesis of the macrocyclic compounds including those which form C-C, C-O, C-S, C-N, C=N and B-O bonds [15].…”