A 10 A convenient method for the preparation of mono- and bis-substituted photochromic bis(benzothienyl)perfluorocyclopentenes via regioselective Friedel–Crafts acylation / N. S. Bogatishcheva, V. N. Yarovenko, K. S. Levchenko, O. I. Kobeleva, T. M. Valova, V. A. Barachevskii, M. I. Struchkova, P. S. Shmelin, M. M. Krayushkin, V. N. Charushin // Tetrahedron Letters. - 2012. - Vol.53, №44. - С. 5948-5951 Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): REGIOSELECTIVE FRIEDEL–CRAFTS ACYLATION -- PHOTOCHROME -- BENZOFURANS Аннотация: The regioselective Friedel–Crafts acylation of 1,2-bis(2-methylbenzo[b]thien-3-yl)hexafluorocyclopentene was developed. Depending on the reaction conditions, mono- or bis(bromoacetyl) derivatives are formed as single products in good yields. Further heterocyclizations involving α-bromoketone moieties gave a series of new photochromic compounds \\\\Expert2\\nbo\\Tetrahedron Letters\\2012, v. 53, p. 5948.pdf |