title: Synthesis of photochromic 1,2-dihetarylethene using regioselective acylation of thienopyrroles.
abstract: [formula: see text] The influence of catalysts, acid chlorides, and solvents in the acylation of methyl 2-methyl-4H-thieno[3,2-b]pyrrole-5-carboxylate was studied. Conditions for the regioselective acylation processes were found. Thienopyrrole-based photochrome was synthesized for the first time.
authors.affiliation: N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky Prospect, 119991 Moscow, Russian Federation. mray@mail.ioc.ac.ru
authors.forename: Michael M
authors.initials: MM
authors.lastname: Krayushkin
authors.forename: Vladimir N
authors.initials: VN
authors.lastname: Yarovenko
authors.forename: Stanislav L
authors.initials: SL
authors.lastname: Semenov
authors.forename: Igor V
authors.initials: IV
authors.lastname: Zavarzin
authors.forename: V
authors.initials: V
authors.lastname: Ignatenko
authors.forename: Andrey Yu
authors.initials: AY
authors.lastname: Martynkin
authors.forename: Boris M
authors.initials: BM
authors.lastname: Uzhinov