A new approach to the construction of biphenylenes by the cobalt-catalyzed cocyclization of o-diethynylbenzenes with alkynes. Application to an iterative approach to [3]phenylene, the first member of a novel class of benzocyclobutadienoid hydrocarbons
作者:Bruce C. Berris、George H. Hovakeemian、Yee Hing Lai、Helene Mestdagh、K. Peter C. Vollhardt
DOI:10.1021/ja00306a013
日期:1985.10
Synthese de [3] phenylene, et de ses derives trimethylsilyles par reaction de diethynyl-1,2 benzene avec le bis-trimethylsilylacetylene en presence de η 5 -cyclopentadienyl dicarbonyl-cobalt. Oxydation et reduction des composes synthetises. Structure cristalline des derives silyles
合成这些 [3] 亚苯基,等 de ses 衍生出三甲基甲硅烷基反应 de diethynyl-1,2 苯 avec le 双三甲基甲硅烷基乙炔 en 存在 de η 5 - 环戊二烯基二羰基钴。氧化和还原合成合成。结构 cristalline des 派生 silyles
PhotoâThermal Haptotropism in Cyclopentadienylcobalt Complexes of Linear Phenylenes: Intercyclobutadiene Metal Migration
作者:Thomasâ A. Albright、Peterâ I. Dosa、Tomâ N. Grossmann、Victorâ N. Khrustalev、Oluwakemiâ A. Oloba、Robin Padilla、Renaud Paubelle、Amnon Stanger、Tatianaâ V. Timofeeva、K.â Peterâ C. Vollhardt
DOI:10.1002/anie.200905088
日期:2009.12.21
The CpCo‐shuffle: CpCo} complexes of linear [3]‐ and [5]phenylene undergo a light‐induced haptotropic migration from a more strongly bound cyclobutadiene moiety to a less strongly bound (see scheme). The shift is thermally reversible and proceeds along the periphery of the intervening arene rings. As such, the systems constitute photo–thermal storage systems, as well the first examples of cyclobu
Phane Properties of [2.2]Paracyclophane/Dehydrobenzoannulene Hybrids
作者:Heino Hinrichs、Andrew J. Boydston、Peter G. Jones、Kirsten Hess、Rainer Herges、Michael M. Haley、Henning Hopf
DOI:10.1002/chem.200600498
日期:2006.9.18
A series of [2.2]paracyclophane/dehydrobenzo[14]annulene (PC/DBA) hybrids (hydrocarbons 5, 6, 9, 10 b, and 10 c), [2.2]paracyclophane/dehydro[14]annulene (PC/DA) hybrids (7 and 8) and suitable model systems (11, 12, and 33) has been synthesized. Comparison of the electronic absorption spectra in each series of compounds provides further insight into the global communication between the decks in the
Sonogashira reaction was developed for the synthesis of polysubstituted aromatic alkynes. The reaction was made environmentally friendly and easy to perform by replacing the traditional amine solvents with water. The optimized reaction conditions yielded the products with high yields, while reducing the dependence on anaerobic reaction conditions with no inert gas protection. The reaction also achieved
hexakis(oligothienylethynyl)benzene with C6 symmetry shows solvatochromic fluorescence with a marked redshift in emission. Furthermore, the star‐shaped molecule shows a fairly large two‐photon absorption property. Interestingly, the molecule forms fluorescent fibrous materials from hexane, DMF, and isopropyl alcohol owing to its disc‐like structure (see graphic).