for the construction of n-membered (n>3) N-heterocycles, rely upon two chemical operations by involving sequential nucleophilic and electrophilic C-N bond formations. Here, we report a highly efficient cascade of alkyne insertion/C-H activation/amination for the rapid preparation of a myriad of tricyclic indoles, in a single-step transformation, by using bifunctional secondary hydroxylamines. Noteworthy
Flash-vacuumpyrolysis of N-(2,3-diphenylazirin-3-yl)dihydrobenzoxainones leads to transient N-azirinyl- and N-indolylazaxylylenes which give 2-arylindoles (5) and dihydroindoloquinolines (8) respectively. 5H-1,4-Benzodiazepines are implicated as the precursors to the indoles via the methylene nitrile ylides (9) and an alternative route to the latter by flash pyrolysis of N-(2-methylphenyl)benzimidoyl
A novel palladium-catalyzed [2 + 2 + 1] annulation of alkyne-tethered aryl iodides with diaziridinone was developed, leading to the formation of 3,4-fused tricyclic indoles. From a mechanistic standpoint, the formation of fused tricyclic indole scaffolds involved C,C-palladacycles, which were synthesized through the intramolecular reaction of aryl halides and alkynes. The cascade reaction described
BENZOINDOLE-BASED COMPOUND AND DYE-SENSITIZED SOLAR CELL USING THE SAME
申请人:SHIN Byong-cheol
公开号:US20090173380A1
公开(公告)日:2009-07-09
A benzoindole-based compound represented by Formula 1 below, a dye including the benzoindole-based compound, and a dye-sensitized solar cell including the dye:
is prepared at a low cost, has a high molar absorption coefficient, and high photoelectron conversion efficiency, as compared to a conventional ruthenium dye. The benzoindole-based dye is an organic dye including an N-aryl electron donor and an acidic functional group an electron acceptor.