... Tetrahedron Letters. Volume 38, Issue 44, 3 November 1997, Pages 7793–7796. ... In this letter we describe an easy method for 2-amino-1-methyl-6-phenylimidazo[4,5-b]pyridine (PhIP) synthesis, starting from the commercially available 2,3-diaminopyridine 1 via the 2-amino-3 ...