... Tetrahedron Letters. Volume 41, Issue 14, 1 April 2000, Pages 2373–2376. ... was carried out by alkylation with 5-bromomethyl-5′-methyl-2,2′-bipyridine 12 which affords the tertiary amine 3 2 in 38% yield (Scheme 2). 13 The quaternized ammonium bromide 4 14 was prepared ...