New Approach to 4‐ and 5‐Aminopyrazole Derivatives

References

• Blass , B. E. , Srivastava , A. , Coburn , K. R. , Faulkner , A. L. and Seibel , W. L. 2003 . A simple method for the preparation and selective functionalization of 4,5‐diamino‐pyrazoles . Tetrahedron Lett. , 44 : 3009
   Web of Science ®Google Scholar
• Wang , Y. , Wang , J. , Cui , Y. , Fawcett , J. and Gu , J. 2005 . Liquid chromatographic–tandem mass spectrometric method for the quantitation of sildenafil in human plasma . J. Chromatogr. (B) , 828 : 118
   PubMed Web of Science ®Google Scholar
• Elnagdi , M. H. , Al‐Awadi , N. and Erian , A. W. 1996 . Comprehensive Heterocyclic Chemistry II Edited by: Katritzky , A. R. , Rees , C. W. and Scriven , E. F. V. Vol. 7 , 431 Oxford : Pergamon Press .
   Google Scholar
• Weikel , K. W. , Wickman , I. J. M. , Augustin , S. G. and Strom , J. G. 2000 . Clinical Therapeutics , 22 : 11
   Google Scholar
• Salaheldin , A. M. , Abdallah , T. A. , Radwan , N. F. and Hassaneen , H. M. 2006 . Novel route to 4‐aminopyrazoles and aminopyrazolo[4,3‐b]pyridines . Z. Naturforsch. , 16b : 1158
   Google Scholar
• Abdel‐Motaleb , R. M. , Makhloof , A. A. , Ibrahim , H. M. and Elnagdi , M. H. 2006 . Studies with 3‐functionally substituted 2‐arylhydrazononitriles: A new route to 3‐substituted‐2‐arylhydrazononitriles, 4‐amino‐pyrazole‐5‐carbonitriles, azadienes and cinnolines . J. Heterocycl. Chem. , 43 : 931
   Web of Science ®Google Scholar
• Burchat , A. F. , Calderwood , D. J. , Friedman , M. M. , Hirst , G. C. , Rafferty , P. , Ritter , K. and Skinner , B. S. 2002 . Pyrazolo[3,4‐d]pyrimidines containing an extended 3‐substituent as potent inhibitors of Lck—a selectivity insight . Bioorg. Med. Chem. Lett. , 12 : 1687
   PubMed Web of Science ®Google Scholar
• Hassaneen , H. M. E. , Hassaneen , H. M. and Elnagdi , M. H. 2004 . Enamines in heterocyclic synthesis: A route to 4‐substituted pyrazoles and condensed pyrazoles . Z. Naturforsch. , 59b : 1132
   Google Scholar
• Al‐Saleh , B. , Makhseed , S. , Hassaneen , H. M. E. and Elnagdi , M. H. 2006 . Studies with functionally substituted enamines: The reactivity of enaminals and enamino esters toward naphthoquinone, hydrazonoyl halides, aminoazoles and hippuric acid . Synthesis , 1 : 59
   Google Scholar
• Hassaneen , H. M. , Abdelhadi , H. A. and Abdallah , T. A. 2001 . Novel synthesis of 1,2,4‐triazolo[4,3‐a]pyrimidin‐5‐one derivatives . Tetrahedron , 57 : 10133
   Web of Science ®Google Scholar
• Slatt , J. , Romero , I. and Bergman , J. 2004 . Cyanoacetylation of indoles, pyrroles and aromatic amines with the combination cyanoacetic acid and acetic anhydride . Synthesis , 16 : 2760
   Google Scholar
• El‐Dusouqui , O. M. E. , Abdelkhalik , M. M. , Al‐Awadi , N. A. , Dib , H. , George , B. J. and Elnagdi , M. H. 2006 . Chemistry of 2‐arylhydrazonals: Utility of substituted 2‐arylhydrazono‐3‐oxoalkanals as precursors for 3‐oxoalkanonitriles, 3‐amino‐isoxazole and 1,2,3‐ and 1,2,4‐triazoles . J. Chem. Res , : 291
   Google Scholar
• Kenawi , I. M. and Elnagdi , M. H. 2006 . DFT and FT‐IR analyses of hydrogen bonding in 3‐substistuted‐3‐oxo‐arylhydrazonopropanenitriles . Spectrochemica Acta (A) , 65 : 805
   Web of Science ®Google Scholar
• Gopalasmy , A. , Yang , H. , Ellingboe , J. W. , Tsou , H. , Zhang , N. , Honores , E. , Powell , D. , Miranda , M. , McGinnis , J. P. and Rabindran , S. K. 2005 . Pyrazolo[1,5‐a]pyrimidin‐7‐yl phenyl amides as novel anti‐proliferative agents: Parallel synthesis for lead optimization of amide region . Bioorg. Med. Chem. Lett. , 15 : 1591
   PubMed Web of Science ®Google Scholar