1006877-74-2Relevant articles and documents
Manganese catalysts with C1-symmetric N4 ligand for enantioselective epoxidation of olefins
Wang, Bin,Miao, Chengxia,Wang, Shoufeng,Xia, Chungu,Sun, Wei
, p. 6750 - 6753 (2012)
Bioinspired manganese complexes based on N4 ligands, with a more rigid, chiral diamine derived from proline and two benzimidazoles, were synthesized and applied to epoxidize olefins with hydrogen peroxide as a clean oxidant. Notably, 60-99 % isolated yields and excellent ee values (up to 95 %) were obtained by using low catalyst loadings (0.01-0.2 mol %; see scheme; F green, S yellow). Copyright
Bioinspired manganese and iron complexes with tetradentate n ligands for the asymmetric epoxidation of olefins
Wang, Xiaoe,Miao, Chengxia,Wang, Shoufeng,Xia, Chungu,Sun, Wei
, p. 2489 - 2494 (2013)
The manganese and iron complexes with the tetradentate N ligand (1R,2R)-N,N'-dimethyl-N,N'-bis(1-methyl-2-benzimidazolylmethyl)cyclohexane-1,2-diamine have been synthesized and characterized. The crystal structure of the manganese complex demonstrates a cis-α configuration. Both the manganese and iron complexes are active catalysts for the asymmetric epoxidation of olefins with H2O2 as an oxidant and acetic acid as an additive. Up to 96% ee was observed for the epoxidation of α,β-unsaturated ketones at -20°C.
