... A novel reaction of 2,4,6 triphenyl(thio)selenopyrylium salts leading to benzoyl(thio)selenophenes and 2,4,6 triphenyl(thio)selenopyrans BI Drevko, EG Bol'shakova, AF Almaeva, MA Suchkov, VG Mandych, and GA Shekhter Saratov Military Institute of Biological and Chemical Safеty, 5 prosp. ... Compd. (Engl. Transl.), 1984, 20]. 6. BI Drevko, SN Petrakov, LA Fomenko, OI Zhykov, MI Smushkin, VG Kharchenko, Zh. Org. Khim., 1994, 30, 115 [J. Org. Chem. ...