Efficient synthesis of triarylamines catalyzed by palladium/N-heterocyclic carbene

Sonogashira-Hagihara and Buchwald-Hartwig cross-coupling reactions with sydnone and sydnone imine derived catalysts

“…2 was applied. It is as effective as an expanded-ring NHC for the synthesis of 20 46 and imidazolylidene Pd complexes for the synthesis of 20 47 and 21. 46 Compound 22 was prepared in better yields when Pd(OAc)2, NaOtBu, tBuP3 in o-xylene was used.…”

Synthesis and photophysical properties of novel thiophenylacrylonitrile derivatives containing a triphenylamine moiety

“…[5][6][7][8] The high polarisability of sulfur atoms in thiophene rings leads to a stabilisation of the conjugated chain and to excellent charge-transport properties, which are one of the most crucial assets for applications in organic and molecular electronics. [9][10][11] At the same time, triphenylamine derivatives are important materials, widely used in organic photoconductor, organic light-emitting compounds, [12][13][14][15] organic solar cells and other fields due to their excellent electrochemical stability, electron-donating ability and optoelectronic properties. 16,17 Based on our studies in the field of triphenylamine [18][19][20][21] General procedure for the synthesis of (1a, 1b) A solution of the thiophene-3-carbaldehyde (10 mmol) and aromatic acetonitrile (10 mmol) in absolute EtOH (30 mL) was treated with NaOMe (1 mmol) portion wise, stirred at room temperature for 2-3 hours, cooled to 0 °C, and filtered.…”