Citation:
Shen Luan Yu, Yan Yun Li, Zhen Rong Dong, Juan Ni Zhang, Qi Li, Jing Xing Gao. Synthesis of novel chiral N, P-containing multidentate ligands and their applications in asymmetric transfer hydrogenation[J]. Chinese Chemical Letters,
;2011, 22(11): 1269-1272.
doi:
10.1016/j.cclet.2011.05.033
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Novel chiral PN4-type multidentate aminophosphine ligands have been successfully synthesized by Schiff-base condensation of bis(o-formylphenyl)phenylphosphane and various chiral amino-sulfonamides. Their structures were fully characterized by IR, EI-MS and NMR. The catalytic systems, prepared in situ from the multidentate ligands and iridium(I) complexes, showed high activity in asymmetric transfer hydrogenation of propiophenone in 2-propanol solution, leading to corresponding optical alcohol with up to 75% ee.
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