Improved palladium-catalyzed coupling reactions of aryl halides using saturated N-heterocarbene ligands

Gurbuz N., Ozdemir I., Demir S., CETINKAYA B.

JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL, cilt.209, ss.23-28, 2004 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 209
  • Basım Tarihi: 2004
  • Doi Numarası: 10.1016/j.molcata.2003.08.002
  • Dergi Adı: JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.23-28
  • Anahtar Kelimeler: palladium, imidazolidin-2-ylidene, aryl halides, phenylboronic acid, Suzuki, styrene, Heck, HETEROCYCLIC CARBENE COMPLEXES, SUZUKI CROSS-COUPLINGS, HECK-TYPE REACTIONS, ARYLBORONIC ACIDS, EFFICIENT CATALYSTS, ROOM-TEMPERATURE, STABLE CARBENES, CHLORIDES, PALLADACYCLES, COORDINATION
  • İnönü Üniversitesi Adresli: Evet

Özet

The incorporation of saturated N-heterocyclic carbenes into palladium pre-catalysts gives high catalyst activity in the Suzuki coupling of aryl iodides, bromides and deactivated aryl chloride substrates, whereas the yield of the palladium catalyzed Heck reaction of deactivated aryl chlorides is negligible. The complexes were generated in the presence of Pd(OAc)(2) by in situ deprotonation of 1,3-dialkylimidazolinium salts LHX (1) which were characterized by conventional spectroscopic methods and elemental analyses. (C) 2003 Elsevier B.V. All rights reserved.