CHO NH Cp ZrCl 2 2 NH 2 Ethanol, RT N Keywords Zirconocene dichloride o-Phenylenediamine Aromatic aldehydes 2-Substituted benzimidazole derivatives Ambient temperature Introduction Organozirconocenes represent an important class of metallocenes that have garnered intensive research interest on account of their fascinating sandwich structure and unusual properties. Zirconocene dichloride is an air and moisture stable, non-hazardous, 16 electron, d organozirconocene that has been the & Vasant Helavi firstname.lastname@example.org Department of Chemistry, Rajaram College, Kolhapur, Maharashtra 416004, India Department of Chemistry, Shivaji University, Kolhapur, Maharashtra 416004, India 123 7258 S. Karhale et al. subject of an intense research competition in the industrial sector. It is one of the most widely used metallocene-based catalysts for ethylene polymerization . The catalytic activity of Cp ZrCl and other structurally related 2 2 metallocenes are attributed to their Lewis acidic character [2, 3]. Despite the interesting catalytic potential of Cp ZrCl , its applications in organic synthesis 2 2 are scarcely reported [4–6]. The catalytic phenomena occurring with Cp ZrCl 2 2 include the formation of unsaturated di-and polycyclic aluminacarbocycles , quinozolin-4(3H)-ones , 1-amidoalkyl-2-naphthols , 1,5-benzodiazepines , cyclobutenylphosphaonates , 5-hydroxy-1-alkenyboronates , intramolecular cyclization , pinacol coupling of aromatic aldehydes and ketones ,
Research on Chemical Intermediates – Springer Journals
Published: Apr 7, 2016
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