title: Catalytic asymmetric cyclopropanation at a chiral platform.
abstract: Novel chiral Robson-type macrocyclic complexes M(2)-L [where M = Mn(II), Mn(III), Co(II) and Co(III) and L denotes tetra-Schiff base chiral ligands, L1 or L2] have been synthesized by metal template condensation of 2,6-diformyl-4-methyl-phenol, with 1R,2R-diaminocyclohexane (L1) or 1R,2R-diphenylethylenediamine (L2). The dinuclear Co(II) and Co(III) complexes catalyze asymmetric cyclopropanation of styrene with diazoacetate cooperatively and with high enantioselectivity.
authors.affiliation: Department of Radiology, University of Texas Health Science Center-San Antonio, Texas 78229-3900, USA. gao2@uthscsa.edu
authors.forename: Jian
authors.initials: J
authors.lastname: Gao
authors.forename: F Ross
authors.initials: FR
authors.lastname: Woolley
authors.forename: Ralph A
authors.initials: RA
authors.lastname: Zingaro
mesh_terms: D002384:Catalysis; D003500:Cyclization; D008958:Models, Molecular; D011407:Propane / Q000737:chemistry*; D013237:Stereoisomerism
chemical_list: D011407:Propane