Alternative approaches to (Z)-1,2-bis(2-bromopyridin-3-yl)ethenes, key intermediates in the synthesis of the 1,10-phenanthroline core

Alternative approaches to (Z)-1,2-bis(2-bromopyridin-3-yl)ethenes, key intermediates in the synthesis of the 1,10-phenanthroline core / Chelucci, Giorgio Adolfo; Baldino, S; Pinna, Gerard Aime; Sechi, B.. - In: TETRAHEDRON LETTERS. - ISSN 0040-4039. - 49:17(2008), pp. 2839-2843. [10.1016/j.tetlet.2008.02.112]