Synthesis of a water-soluble carbene complex and its use as catalyst for the synthesis of 2,3-dimethylfuran

Ozdemir I., YIGIT B., CETINKAYA B., ULKU D., TAHIR M., ARICI C.

JOURNAL OF ORGANOMETALLIC CHEMISTRY, cilt.633, ss.27-32, 2001 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 633
  • Basım Tarihi: 2001
  • Doi Numarası: 10.1016/s0022-328x(01)01029-4
  • Dergi Adı: JOURNAL OF ORGANOMETALLIC CHEMISTRY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.27-32
  • Anahtar Kelimeler: ruthenium, water-soluble carbene complex, recyclable catalyst, crystal structures, HETEROCYCLIC CARBENES, METAL-COMPLEXES, NEW-GENERATION, RUTHENIUM, LIGANDS, CROSS, PALLADIUM(II), ALKENES, BEARING, RHODIUM
  • İnönü Üniversitesi Adresli: Evet

Özet

1,1,3,3'-Tetrakis(p-dimethylaminobenzyl)-2,2'-biimidazolidinylidene, L-2(R) (R = CH2C6H4NMe2-p) which contains four peripheral NMe2 substituents, was obtained from 4-dimethylaminobenzaldehyde by a three-step reaction sequence, and was used for the preparation of imidazolidin-2-ylidene Ru(II) and Rh(I) complexes 1 and 2. Etherial HCl readily protonates the NMe2 functionality on the carbene ligand of 1 to give the corresponding salt, 1'; whereas the reaction of 2 with HCl gave a hygroscopic and ill-defined rhodium species. In aqueous solution the salt 1' is an efficient and active catalyst for intramolecular cyclisation of (Z)-3-methylpent-2-en-4-yn-1-ol into 2,3-dimethylfuran. The catalyst 1' could be recovered by simple phase separation and the catalytic reaction was maintained for five different runs. All of the new compounds were characterised by elemental analyses, IR and NMR spectroscopy and the molecular structure of I was determined by X-ray crystallography. (C) 2001 Elsevier Science B.V. All rights reserved.