期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 57, 期 39, 页码 12859-12864出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201805372
关键词
carbanion; homogeneous catalysis; phosphine ligands; structure elucidation; ylides
资金
- European Research Council [YlideLigands 677749]
- German Research Foundation within the Cluster of Excellence RESOLV [EXC1069]
Phosphines are important ligands in homogenous catalysis and have been crucial for many advances, such as in cross-coupling, hydrofunctionalization, or hydrogenation reactions. Herein we report the synthesis and application of a novel class of phosphines bearing ylide substituents. These phosphines are easily accessible via different synthetic routes from commercially available starting materials. Owing to the extra donation from the ylide group to the phosphorus center the ligands are unusually electron-rich and can thus function as strong electron donors. The donor capacity surpasses that of commonly used phosphines and carbenes and can easily be tuned by changing the substitution pattern at the ylidic carbon atom. The huge potential of ylide-functionalized phosphines in catalysis is demonstrated by their use in gold catalysis. Excellent performance at low catalyst loadings under mild reaction conditions is thus seen in different types of transformations.
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