On August 31, 2019, Maximuck, William J.; Gladysz, John A. published an article.Reference of Methyl 2-cyclopentanonecarboxylate The title of the article was Lipophilic chiral cobalt (III) complexes of hexaamine ligands: Efficacies as enantioselective hydrogen bond donor catalysts. And the article contained the following:
Four known chiral enantiopure octahedral Co(III) trichloride salts with aliphatic hexaamine ligands are converted to new CH2Cl2 soluble tris(tetraarylborate) or 3BArf- salts (BArf = B(3,5-C6H3(CF3)2)4) in biphasic reactions. These include sepulchrate and sarcophagine complexes in which the hexaamine ligands are bicyclic (Z(CH2NHCH2CH2NHCH2)3Z, Z = N, CX), as well as a truncated sarcophagine in which a missing C vertex renders the ligand acyclic and tripodal, with 3 terminal NH2 groups that define a trigonal C3 sym. face (CH3C(CH2NHCH2CH2NH2)3). In the presence of tertiary amine bases, these are effective catalysts for 2 Michael type C-C bond forming reactions and a related C-N bond forming reaction. Only the last complex affords significant enantioselectivities (30-57% ee). Rationales, and directions for future catalyst optimization, are proposed. The experimental process involved the reaction of Methyl 2-cyclopentanonecarboxylate(cas: 10472-24-9).Reference of Methyl 2-cyclopentanonecarboxylate
The Article related to cobalt hexaamine lipophilic chiral complex enantioselective hydrogen bond catalyst, Placeholder for records without volume info and other aspects.Reference of Methyl 2-cyclopentanonecarboxylate
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