the presence of m-chloroperoxybenzoic acid to give substituted arenes as cycloadducts. Alternatively, thiophene S-oxides have been prepared by oxidation from thiophenes and have been subjected to cycloaddition with alkynes in a subsequent step. The outcome of the reaction is dependent on the steric demand of the thiophene S-oxide. Some thiophene S-oxides can be reacted at temperatures as high as 140°C
Cycloaddition of Zirconacyclopentadiene with 2-Bromoacrylate, 2-Bromoacrylaldehyde, and 3-Bromofuran-2,5-dione in the Presence of CuCl: A New Pathway for the Formation of Benzene Derivatives and Isobenzofuran-1,3-dione
作者:Chao Chen、Xiaoyu Yan、Chanjuan Xi
DOI:10.1080/00397910903007053
日期:2010.2.2
Reaction of zirconacyclopentadienes with 2-bromoalkenes in the presence of CuCl afforded multisubstituted benzene derivatives. The reactions of 2-bromoacrylate and 2-bromo-3-phenylacrylaldehyde afforded penta- and hexasubstituted benzenes in good yields. The reaction of 3-bromofuran-2,5-dione with zirconacyclopentadienes gave isobenzofuran-1,3-diones in good yields.
Ried,W.; Boennighausen,K.H., Justus Liebigs Annalen der Chemie, 1961, vol. 639, p. 61 - 67
作者:Ried,W.、Boennighausen,K.H.
DOI:——
日期:——
Sterically hindered 5,15-tetraphenylbenzene-porphyrins: syntheses, structures, atropisomerism and photophysical properties
作者:R V Ramana Reddy、Biju Basumatary、Muthuchamy Murugavel、Karunesh Keshav、Adiki Raja Sekhar、Jeyaraman Sankar
DOI:10.1007/s12039-018-1485-5
日期:2018.7
TPB}}\) bond. Both the atropisomers could be structurally characterized. The photophysical and electrochemical properties of the synthesized hybrids have been investigated with respect to tetraphenylporphyrin (TPP) and tetraphenylporphyrinatozinc(II) (ZnTPP). These hybrids exhibit reminiscent absorption and emission properties. Moreover, the redox potentials of the TPB conjugates are found to be sensitive