Synthesis and complexation properties of poly(ethylene glycol)-linked mono- and bis-dioxocyclams.
Both tri- and tetra(ethylene glycol) linked bis-chromium carbene complexes have been synthesized. These carbene complexes were photolyzed with N-protected imidazolines to give protected azapenams. These were transformed into polyether-linked basket dioxocyclams 4a,b and bis-dioxocyclams 5a,b. These compounds have cavities for the complexation of both "hard" and "soft" metal ions. The complexes of Ni, Ba, and Gd were synthesized.
Puntener
K
K
Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, USA.
Hellman
M D
MD
Kuester
E
E
Hegedus
L S
LS
D000107:Acetylation; D001464:Barium / Q000737:chemistry; D002614:Chelating Agents / Q000138:chemical synthesis* / Q000737:chemistry; D002857:Chromium / Q000737:chemistry; D018360:Crystallography, X-Ray; D009682:Magnetic Resonance Spectroscopy; D008968:Molecular Conformation; D009532:Nickel / Q000737:chemistry; D009942:Organometallic Compounds / Q000138:chemical synthesis* / Q000737:chemistry; D011092:Polyethylene Glycols / Q000138:chemical synthesis* / Q000737:chemistry
D002614:Chelating Agents; D009942:Organometallic Compounds; D002857:Chromium; D001464:Barium; D011092:Polyethylene Glycols; D009532:Nickel