A convenient method for the preparation of mono- and bis-substituted photochromic bis(benzothienyl)perfluorocyclopentenes via regioselective Friedel–Crafts acylation
作者:A.M. Bogacheva、V.N. Yarovenko、K.S. Levchenko、O.I. Kobeleva、T.M. Valova、V.A. Barachevsky、M.I. Struchkova、P.S. Shmelin、M.M. Krayushkin、V.N. Charushin
DOI:10.1016/j.tetlet.2012.08.111
日期:2012.10
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.
开发了区域选择性的1,2-双(2-甲基苯并[ b ]噻吩-3-基)六氟环戊烯的弗瑞德-克拉夫茨酰化反应。取决于反应条件,单-或双(溴乙酰基)衍生物以良好的产率形成为单一产物。涉及α-溴酮部分的进一步杂环化产生了一系列新的光致变色化合物。