期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 53, 期 3, 页码 861-865出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201308377
关键词
asymmetric catalysis; cycloisomerization; enynes; gold; helicenes; phosphorus
资金
- Institut de Chimie des Substances Naturelles
- China Scholarship Council
- University of Paris Sud
This paper discloses the first uses of phosphahelicenes as chiral ligands in transition-metal catalysis. Unlike all known helical phosphines used so far in catalysis, the phosphorus function of phosphahelicenes is embedded in the helical structure itself. This crucial structural feature originates unprecedented catalytic behaviors and efficiency. An appropriate design and fine tuning allowed both high catalytic activity and good enantiomeric excesses to be attained in the gold promoted cycloisomerizations of N-tethered 1,6-enynes and dien-ynes.
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