Construction of synthetic macrocyclic compounds possessing subheterocyclic rings, specifically pyridine, furan, and thiophene

Coordination chemistry of thioether–pyridazine macrocycles. I. Synthetic, structural, and spectroscopic studies of Cu(II) and Cu(I) complexes of novel thioether–pyridazine macrocycles that contain two or three pyridazine subunits

“…In addition, the coordination chemistry of chelating agents with built-in thioether and azole groups (15), and macrocyclic ligands with thioether and amino, amido, pyridine, furan, and thiophene subunits, has also been explored (24)(25)(26)(27)(28)(29)(30)(31)(32)(33).…”

Thiophenophane–metal complexes. I. Preparation, X-ray structure, and cyclic voltammetry of 2,5,8-trithia[9](2,5)thiophenophane, L, and of its metalcomplexcation bis(2,5,8-trithia[9](2,5)thiophenophane-S2,S3]copper(I),[CuL2]+1

“…The Cu-S bond lengths vary between 2.301 and 2.392 A with an average length of 2.340 A. These results may be compared to those from the cation [Cu1( [15]aneS5)]+ (19) wbich range from 2.243 to 2.338 A with an average of 2.286 A or those from bis(3,6-dithiaoctane)copper(I) tetrafluoroborate ( 2! ) which range from 2.280 to 2.318 A with an average of 2.303 A.…”

“…Traditional synthetic methods for macrocyclic compounds possessing heterocyclic sub-units have been reviewed (15). Synthesis of ligand L was carried out in 55% yield by a traditional high dilution S N 2 cyclization (reaction [ I ] ) .…”

Samarium(III) nitrate-catalyzed one-pot synthesis of 42-membered N,S,O-containing cyclophanes

“…[1][2][3][4][5][6][7] A considerable drawback of this method is the formation of by-products arising from linear polycondensation or simultaneous [n+n]-cyclocondensation of the initial α,ω-bifunctional compounds. [8][9][10][11][12][13][14] The formation of by-products is minimised, as a rule, by using high dilution, 11,15,16 templates, [17][18][19][20][21][22] and catalytic reactions.…”