期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 58, 期 44, 页码 15767-15771出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201909928
关键词
asymmetric hydrogenation; chiral amines; cobalt; hydrazines; hydrazones
资金
- Shanghai Municipal Education Commission [201701070002E00030]
- National Natural Science Foundation of China [21620102003, 21831005, 91856106, 21572131]
An efficient cobalt-catalyzed asymmetric hydrogenation of C=N bonds has been realized. Chiral hydrazines were obtained in high yields and with excellent enantioselectivities (95-98 % ee). The hydrogenation went smoothly at up to 2000 substrate/catalyst and on a gram scale. The success of this reaction relies on the presence of an NHBz group in the substrates, with the reactivity and enantioselectivity improved by an assisted coordination to the cobalt atom and a nonbonding interaction with the ligand. Furthermore, this reaction has practical applications for the synthesis of several useful chiral nitrogen-containing compounds.
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