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Title: On the regiospecificity of 3,5-disubstituted pyrazoles derived from C-acylated--enaminonitriles and esters
Authors: Mukherjee, A
Mishra, M
Chatterjee, A
Sarkar, M
Chowdhury, S K Dutta
Mahalanabis, Kumar K
Keywords: Regiospecificity;3,5-disubstituted pyrazoles;enaminonitriles;phenylhydrazine;aminocrotononitriles;enaminoesters;5-substituted pyrazoles
Issue Date: Nov-2005
Publisher: CSIR
IPC Code: Int.Cl.7 C 07 D
Abstract: Regiospecificity of 3,5-disubstituted pyrazoles derived from reaction of phenylhydrazine with -acyl-β-amino­crotononitriles and esters is primarily deduced on the basis of spectral analyses. The present work provides direct and unambiguous evidences in support of the regiospecificity of these pyrazoles. In addition, this work also shows that -acyl-β-enaminones derived from enaminonitriles and enaminoesters both afford 5-substituted pyrazoles in contrast to earlier observation by Benary.
Page(s): 2333-2337
ISSN: 0975-0983(Online); 0376-4699(Print)
Appears in Collections:IJC-B Vol.44B(11) [November 2005]

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