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2, 2', 6, 6'- TETRASUBSTITUTED AMINOPHOSPHINE LIGAND AND ITS SYNTHESIS METHOD
2, 2', 6, 6'- TETRASUBSTITUTED AMINOPHOSPHINE LIGAND AND ITS SYNTHESIS METHOD
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机译:2,2',6,6'-四取代的氨基膦配体及其合成方法
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摘要
The present invention relates to a 2,2′,6,6′-tetrasubstituted aminophosphine ligand and its synthesis method. The structure of the ligand is shown as below. Its synthesis method comprises: Step (1) coupling 2,6-dinitrochlorobenzene as the starting material to obtain 2,2′,6,6′-tetranitrobiphenyl; Step (2): hydrogenating the 2,2′,6,6′-tetranitrobiphenyl with Pd/C to obtain 2,2′,6,6′-tetraminobiphenyl; Step (3): reacting the 2,2′,6,6′-tetraminobiphenyl with a phosphine halide to obtain the 2,2′,6,6′-tetrasubstituted aminophosphine ligand. The ligand of the present invention is an achiral compound, and its preparation method is simple. The ligand can be converted to a chiral bimetallic catalyst with single configuration eventually through introduction of external chirality. Moreover, the ligand can be used in various asymmetric reaction catalyzed by metals with high reactivity and stereoselectivity.; 展开▼