- Lewis acid-catalyzed one-pot, three-component route to chiral 3,3′-bipyrroles
-
(Chemical Equation Presented) 3,3′-Bipyrroles 3 could be synthesized using a double Michael addition reaction involving diaroyl acetylene 1 and the appropriate 1,3-dicarbonyls 2 using ammonium acetate as a nitrogen source. The axial chirality of bipyrrole was anticipated from the X-ray crystal structure and DFT calculations and confirmed by separating the racemates on a chiral column and subsequent CD spectra of the enantiomers. The absolute configuration of the enantiomers was achieved by theoretical CD spectra calculation using the ZINDO method.
- Dey, Sumit,Pal, Churala,Nandi, Debkumar,Giri, Venkatachalam Sesha,Zaidlewicz, Marek,Krzeminski, Marek,Smentek, Lidia,Hess Jr., B. Andes,Gawronski, Jacek,Kwit, Marcin,Babu, N. Jagadeesh,Nangia, Ashwini,Jaisankar, Parasuraman
-
supporting information; experimental part
p. 1373 - 1376
(2009/04/10)
-
- The important role of solvent vapor in an organic solid state reaction
-
Some organic reactions in the solid state proceeded very efficiently and selectively in the presence of a small amount of solvent vapor. The Royal Society of Chemistry 2005.
- Nakamatsu, Seiken,Toyota, Shinji,Jones, William,Toda, Fumio
-
p. 3808 - 3810
(2007/10/03)
-
- Synthesis and characterization of some heterocyclic analogues of N,N′-perarylated phenylene-1,4-diamines and benzidines as a new class of hole transport materials
-
Starting from N,N-diarylsubstituted thioureas 20 and thioacetamides 21 a series of heterocyclic analogous of N,N′-perarylated phenylene-1,4-diamines and benzidines was obtained. These compounds represent, as studied by DSC measurements, a new class of hole transporting materials with high thermal stability and high tendency to form stable amorphous states. Moreover, some of the new compounds are, as measured by cyclic voltammetry, easily reversibly oxidized indicating the formation of persistent radical ions. Such compounds, which are, in general, completely substituted by aryl groups at their heterocyclic moieties, have been successfully used as hole-transport materials in OLEDs.
- Schumann, Joerg,Kanitz, Andreas,Hartmann, Horst
-
p. 1268 - 1276
(2007/10/03)
-
- Ylidions: A New Reactive Intermediate Prepared by Photosensitized One-Electron Oxidation of Phenacyl Sulfonium Ylides
-
The chemistry of a series of phenacyl sulfonium ylides was studied.Their photosensitized one-electron oxidation by 9,10-dicyanoanthracene generates ylidions, a new class of radical cation intermediates.In some cases, the ylidions cleave to form a free alkyl radical and a cation; in others, they are attacked by nucleophiles or by an alkene.The chemical properties displayed by the phenacyl sulfonium ylidions appear to be controlled primarily by the nature of the sulfur-bound alkyl groups.The direct photolysis and thermolysis of the phenacyl sulfonium ylides was examined for comparison with their one-electron oxidation.Some of the ylides undergo the Stevens rearrangement either when heated or photolyzed.Contrary to an earlier report, there is no evidence that direct photolysis of a phenacyl sulfonium ylide leads to formation of benzoylcarbene.
- Zhang, Jian-Jian,Schuster, Gary B.
-
p. 7149 - 7155
(2007/10/02)
-
