Journal
ORGANOMETALLICS
Volume 30, Issue 12, Pages 3340-3345Publisher
AMER CHEMICAL SOC
DOI: 10.1021/om200233x
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Funding
- PAPIIT-DGAPA-UNAM [IN-201010]
- CONACYT [080606]
- DGAPA-UNAM
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The transfer hydrogenation of diphenylacetylene to yield cis-and trans-stilbenes was achieved using a variety of amines as hydrogen donors and the complex 1 ([(dippe)Ni(mu-H)](2)) in catalytic amounts (0.5% mol). The use of nucleophilic amines such as pyrrolidine in neat conditions afforded the hydroamination of diphenylacetylene, in moderate to high yields. Cyclization of 2-ethynylaniline also was carried out under similar conditions, with 1 in catalytic amounts, but in low yield, mainly due to the formation of homo coupling products of the starting material. The hydro-genation of diphenylacetylene by using other nitrogenated compounds such as aromatic N-heterocycles was addressed to give a metal-mediated process, using 1 in stoichiometric amounts.
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