- A synthesis of 3-phenyl-1,2,3,4-tetrahydroisoquinoline and 2-phenyl-1,2,4,5-tetrahydro-3H-3-benzazepine via Pummerer-type cyclization: enhancing effect of boron trifluoride diethyl etherate on the cyclization. Saitoh, T., Ichikawa, T., Horiguchi, Y., Toda, J., Sano, T. Chem. Pharm. Bull. (2001)