Isolation of the Half-Condensed Pyrazoline Intermediates en Route to N-(1,10-Phenanthroline)-pyrazole Derivatives from the Knorr Reaction

REFERENCES

• Barsoum , F. F. ; Hosni , H. M. ; Girgis , A. S. Novel bis(1-acyl-2-pyrazolines) of potential anti-inflammatory and molluscicidal properties . Bioorg. Med. Chem. 2006 , 14 , 3929 – 3937 .
   PubMed Web of Science ®Google Scholar
• Bonacorso , H. G. ; Wentz , A. P. ; Lourega , R. V. ; Cechinel , C. A. ; Moraes , T. S. ; Coelho , H. S. ; Zanatta , N. ; Martins , M. A. P. ; Hoerner , M. ; Alves , S. H. Trifluoromethyl-containing pyrazolinyl (p-tolyl) sulfones: The synthesis and structure of promising antimicrobial agents . J. Fluorine Chem. 2006 , 127 , 1066 – 1072 .
   Web of Science ®Google Scholar
• Ozdemir , A. ; Turan-Zitouni , G. ; Kaplancikli , Z. A. ; Revial , G. ; Guven , K. Synthesis and antimicrobial activity of 1-(4-aryl-2-thiazolyl)-3-(2-thienyl)-5-aryl-2-pyrazoline derivatives . Eur. J. Med. Chem. 2007 , 42 , 403 – 409 .
   PubMed Web of Science ®Google Scholar
• Prasad , Y. R. ; Rao , A. L. ; Prasoona , L. ; Murali , K. ; Kumar , P. R. Synthesis and antidepressant activity of some 1,3,5-triphenyl-2-pyrazolines and 3-(2″-hydroxy naphthalen-1″-yl)-1,5-diphenyl-2-pyrazolines . Bioorg. Med. Chem. Lett. 2005 , 15 , 5030 – 5034 .
   PubMed Web of Science ®Google Scholar
• Jeong , T.-S. ; Kim , K. S. ; Kim , J.-R. ; Cho , K.-H. ; Lee , S. ; Lee , W. S. Novel 3,5-diaryl pyrazolines and pyrazole as low-density lipoprotein (LDL) oxidation inhibitor . Bioorg. Med. Chem. Lett. 2004 , 14 , 2719 – 2723 .
   PubMed Web of Science ®Google Scholar
• Song , L.-P. ; Chu , Q.-L. ; Zhu , S.-Z. Synthesis of fluorinated pyrazole derivatives from [beta]-alkoxyvinyl trifluoroketones . J. Fluorine Chem. 2001 , 107 , 107 – 112 .
   Google Scholar
• Singh , S. P. ; Kumar , D. ; Jones , B. G. ; Threadgill , M. D. Formation and dehydration of a series of 5-hydroxy-5-trifluoromethyl-4,5-dihydropyrazoles . J. Fluorine Chem. 1999 , 94 , 199 – 203 .
   Web of Science ®Google Scholar
• Wang , Z.-X. ; Qin , H.-L. Solventless syntheses of pyrazole derivatives . Green Chem. 2004 , 6 , 90 – 92 .
   Web of Science ®Google Scholar
• Yang , Y. ; Yang , P. ; Zhang , C. ; Li , G. ; Yang , X.-J. ; Wu , B. ; Janiak , C. Synthesis, structure, and catalytic ethylene oligomerization of nickel complexes bearing 2-pyrazolyl substituted 1,10-phenanthroline ligands . J. Mol. Catal. A: Chem. 2008 , 296 , 9 – 17 .
   Google Scholar
• Lewis , J. ; O'Donoghue , T. D. Chemistry of polydentate ligands, part 5: Complexes of 2,9-dihydrazino-derivatives of 1,10-phenanthroline: Dependence of coordination number of a ligand on the anion present . J. Chem. Soc., Dalton Trans. 1980 , 736 – 742 .
   Google Scholar
• Garas , A. M. S. ; Vagg , R. S. Synthesis of some novel derivatives of 1,10-phenanthroline . J. Heterocycl. Chem. 2000 , 37 , 151 – 158 .
   Google Scholar
• Etter , M. C. Encoding and decoding hydrogen-bond patterns of organic compounds . Acc. Chem. Res. 1990 , 23 , 120 – 126 .
   Web of Science ®Google Scholar
• Song , L.-P. ; Zhu , S.-Z. Regioselective synthesis of fluorinated pyrazole derivatives from trifluoromethyl-1,3-diketone . J. Fluorine Chem. 2001 , 111 , 201 – 205 .
   Google Scholar
• Sheldrick , G. Program SADABS: Area-Detector Absorption Correction . University of Göttingen : Germany , 1996 .
   Google Scholar
• Sheldrick , G. M. SHELXS-97, SHELXL-97, Programs for Crystal Structure Analysis . University of Göttingen : Germany , 1997 .
   Google Scholar