- Turkish Journal of Chemistry
- Vol: 42 Issue: 6
- The catalytic effects of in situ prepared N-heterocyclic carbenes from benzimidazole salts in Suzuki...
The catalytic effects of in situ prepared N-heterocyclic carbenes from benzimidazole salts in Suzuki–Miyaura cross-coupling reaction and uses in catalytic preparation of 1,3,5-triphenyl-1,3,5-triazinane-2,4,6-trione from phenyl isocyanate
Authors : Ülkü Yilmaz, Hasan Küçükbay
Pages : 1706-1719
View : 9 | Download : 6
Publication Date : 9999-12-31
Article Type : Makaleler
Abstract :Many benzimidazole salts bearing a 3-phenylpropyl substituent (1a-1h) were synthesized and their structures were identified by $^{1}$H NMR, $^{13}$C NMR, and IR spectroscopic methods and elemental analysis. These N-heterocyclic carbene (NHC) precursors were used as a part of a catalytic system including Pd(OAc)$_{2}$ and the base in the Suzuki--Miyaura cross-coupling reaction under microwave irradiation. They were also used as catalysts in the cyclotrimerization of phenyl isocyanate to yield 1,3,5-triphenyl-1,3,5-triazinane-2,4,6-trione. It has been observed that benzimidazole salts made a positive contribution to both catalytic reactions as a NHC precursor.Keywords : Benzimidazole salt, NHC precursor, catalyst, Suzuki--Miyaura reaction, cyclotrimerization of phenyl isocyanate