Reversible 1,4-Insertion of Pyridine Into a Highly Polar Metal-Carbon Bond: Effect of the Second Metal
Journal article published in 2012 by
Crispin Lichtenberg,
Thomas P. Spaniol,
Lionel Perrin 
,
Laurent Maron,
Jun Okuda
,
Laurent Maron,
Jun Okuda
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Abstract
Highly polar allylpotassium reacts with pyridine in a reversible 1,4-insertion to give an unstable N-metalated dihydropyridine (DHP). The N-metalated DHP can be stabilized by conversion into the corresponding potassium zincate or magnesate maintaining the reversible character of the insertion reaction.