Details

Autor(en) / Beteiligte

• Musina, Elvira I
• Wittmann, Tatiana I
• Musin, Lenar I
• Balueva, Anna S
• Shpagina, Alena S
• Litvinov, Igor A
• Lönnecke, Peter
• Hey-Hawkins, Evamarie
• Karasik, Andrey A
• Sinyashin, Oleg G

Titel

Dynamic Covalent Chemistry Approach toward 18-Membered P4N2 Macrocycles and Their Nickel(II) Complexes

Ist Teil von

• Journal of organic chemistry, 2020-11, Vol.85 (22), p.14610-14618

Ort / Verlag

American Chemical Society

Erscheinungsjahr

2020

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• A dynamic covalent chemistry approach was used for the stereoselective synthesis of 1,10-diaza-3,8,12,17-tetraphosphacyclo­octadecanes via condensation reaction of 1,4-bis­(organylphosphino)­butane, formaldehyde, and primary amines. The obtained 18-membered P4N2 macrocycles were isolated in pure form as meso- (R P S P S P R P) or rac- (R P R P R P R P/S P S P S P S P) isomers. The structural features of the individual stereoisomers were revealed by NMR spectroscopy and X-ray structure analysis. All P4N2 macrocycles form square-planar nickel­(II) complexes with the R P S P S P R P isomer only, in which the orientation of the lone pairs of electrons at phosphorus favors this coordination mode, independent of the initial configuration of the ligand, indicating the ability of the 18-membered P4N2 macrocycles to stereoisomerize in the course of the complexation.