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

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Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :Many benzimidazole salts bearing a 3-phenylpropyl substituent insert ignore into journalissuearticles values(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 insert ignore into journalissuearticles values(NHC); precursors were used as a part of a catalytic system including Pdinsert ignore into journalissuearticles values(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