Homochiral coordination cages assembled from dinuclear paddlewheel nodes and enantiopure ditopic ligands: syntheses, structures and catalysis.
A series of homochiral metal-organic cages (MOCs) have been obtained from self-assembly of Cu(II) salts with chiral N,N'-(bicyclo[2,2,2]oct-7-ene-tetracarboxylic)-bis-amino acids. Single-crystal X-ray diffraction analyses reveal that these compounds show a lantern-type cage structure, in which one pair of Cu2(CO2)4 paddlewheels is linked by four diacid ligands. The resulting homochiral cages have been fully characterized by EA, TOF-MS, TGA, VTPXRD, IR, UV, and CD measurements. The catalytic tests reveal that these Cu(II) cages are effective in cyclopropanation with excellent diastereoselectivity (up to 99 : 1 E/Z). In addition, the cage catalysts can promote the aziridination reaction with PhI=NNs.
MOE Laboratory of Bioinorganic and Synthetic Chemistry, Lehn Institute of Functional Materials, School of Chemistry and Chemical Engineering, Sun yat-sen University, Guangzhou, 510275, P. R. China. zhli99@mail.sysu.edu.cn cesscy@mail.sysu.edu.cn.
Lianfen
L
Chen
Jian
J
Kang
Hao
H
Cui
Yingxia
Y
Wang
Lan
L
Liu
Li
L
Zhang
Cheng-Yong
CY
Su
D000596:Amino Acids / Q000737:chemistry; D002384:Catalysis; D056831:Coordination Complexes / Q000737:chemistry*; D003300:Copper / Q000737:chemistry*; D008024:Ligands; D015394:Molecular Structure
D000596:Amino Acids; D056831:Coordination Complexes; D008024:Ligands; D003300:Copper