Journal
EUROPEAN JOURNAL OF ORGANIC CHEMISTRY
Volume 2011, Issue 20-21, Pages 3815-3824Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/ejoc.201100428
Keywords
Nickel; Cycloaddition; Cyanamides; Alkynes; Carbenes
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Funding
- National Science Foundation (NSF)
- National Institute of General Medical Studies (NIGMS) [5RO1GM076125]
- Division Of Chemistry
- Direct For Mathematical & Physical Scien [0911017] Funding Source: National Science Foundation
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A variety of bicyclic N,N-disubstituted 2-aminopyridines have been prepared from diynes and cyanamides by nickel-catalyzed [2+2+2] cycloaddition reactions. The reactions proceeded at room temperature with low catalyst loading to afford 2-aminopyridines in good to excellent yields. The method is amenable to both internal and terminal diynes and proceeds in a regioselective manner. A number of cyanamides with diverse functional group tolerance were used. The intermolecular version employing 3-hexyne and N-cyanopyrrolidine also afforded the desired N,N-disubstituted 2-aminopyridine in good yield.
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