Journal
ORGANOMETALLICS
Volume 31, Issue 3, Pages 1208-1211Publisher
AMER CHEMICAL SOC
DOI: 10.1021/om201223j
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Funding
- National Natural Science Foundation of China [20972074]
- National Basic Research Program of China (973 Program) [2012CB821600]
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Well-defined calcium and ytterbium complexes [{2-NC(Ph)NArC6H4CHNAr}M{N(SiMe3)(2)}(THF)] (M = Ca, Yb; Ar = 2,6-iPr(2)C(6)H(3)) have been synthesized and characterized. They catalyze the intermolecular hydrophosphination of alkenes, dienes, and alkynes with high activity and selectivity under mild conditions. Highly selective 1,4-additions (94-100%) for the conjugated dienes examined have been observed with both catalysts. The calcium complex exclusively catalyzes anti addition to alkynes, including terminal alkynes, while the ytterbium, in most cases, catalyzes syn addition., The calcium catalyst could promote hydrophosphination of hindered alkenes such as stilbene under relatively mild conditions.
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