1. N.D. Zelinsky Institute of Organic Chemistry, 119991 Moscow, Leninsky prosp., 47 (Russian Federation), Fax: (+7) 499‐135‐53‐28
2. Department of Technology of Organic Compounds, D.I. Mendeleev University of Chemical Technology of Russia, 125047 Moscow, Miusskaya pl., 9 (Russian Federation)