Jaganaiden Chengebroyen, M. Grellier, M. Pfeffer
Oct 1, 1998
Citations
0
Influential Citations
4
Citations
Journal
European Journal of Inorganic Chemistry
Abstract
In the presence of stoichiometric amounts of bis(acetonitrile)dichloropalladium(II) the ortho-alkenylpyridines 2-but-3′-en-1′-ylpyridine (1), 2-pent-5′-en-1′-ylpyridine (2), 2-hex-5′-en-1′-ylpyridine (3), 2-hept-6′-en-1′-ylpyridine (4) and 2-methyl-6-pent-4′-en-1′-ylpyridine (5) led to a mixture of coordination compounds such as 2-alken-1′-ylpyridine-ĸN:ĸ2C-dichloropalladium(II) and bis(2-alken-1′-ylpyridine-ĸN)-dichloropalladium(II) together with 2-pent-4-ene-1′,3′-diylpyridine-ĸN:ĸ3C-chloropalladium(II) and 2-hex-4-en-1′,3′-diylpyridine-ĸN:ĸ3C-chloropalladium(II) in the case of 2 and 3 respectively. The latter were quantitatively demetallated in the presence of an excess of triphenylphosphane to yield tris(triphenylphosphane)palladium(0), 2-vinyl-2,3-dihydroindolizinium chloride and 2-prop-1′-en-1′-yl-2,3-dihydroindolizinium chloride, respectively, by a regioselective addition of the pyridine unit onto the more congested terminal carbon atom of the allyl fragment.