A Practical Synthetic Route to Benzofuro[2,3-b]pyridine and Trifluoromethyl-α-carbolines - Iaroshenko, Viktor O; Groth, Ulrich; Kryvokhyzha, Nadiya V; Obeid, Samra; Tolmachev, Andrei A; Wesch, Thomas (Synlett, 2008)