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IJC-B Vol.44B(09) [September 2005] >


Title: Novel fluoro substituted benzo[b]pyran with anti-lung cancer activity
Authors: Hammam, Abou El-Fotooh G
Keywords: 6-Fluorobenzo[b]pyran-4-one
pyran-4-ones
phenylhydrazine
thiourea
pyrimidine thione
thiazolopyrimidines
arylmethylene¬thiazolopyrimidine derivatives
dicarbonitrile derivative
human cancer
anticancer activity
Issue Date: Sep-2005
Publisher: CSIR
IPC CodeInt.Cl.7 C 07 D // A 61 P 35/00
Abstract: 6-Fluorobenzo[b]pyran-4-one 1 on condensation with aromatic aldehydes yields 3-arylmethylene-6-fluoro-2,3-dihydrobenzo[b]pyran-4-ones 2 which on treatment with phenylhydrazine and thiourea gives the pyrazole and pyrimidine thione derivatives 3 and 4, respectively. Compound 4 reacts with chloroacetic acid in acetic acid-acetic anhydride mixture to afford the thiazolopyrimidines 5 which on condensation with aromatic aldehyde furnish the corresponding arylmethylene¬≠thiazolopyrimidine derivatives 6. The product 6 could be prepared directly by the action of chloroacetic acid and the proper aldehyde on 4 in the presence of acetic acid-acetic anhydride mixture. Product 2 reacts with malononitrile in the presence of ammonium acetate or piperidine to afford the pyridine- and pyran- 7 and 8 derivatives, respectively. Also, compound 1 on treatment with arylmethylenecyanoacetamide yields the pyridone derivatives 9. Condensation of 1 with malononitrile affords the yliedinemalononitrile 10, which on reaction with p-chlorobenzaldehyde-ammonium acetate or arylmethylene-cyano¬≠acetamide yields the pyridine derivative 11 (isomer of 8) and the dicarbonitrile derivative 12, respectively. The synthesized compounds have been tested against three cell lines of human cancer (lung, breast and CNS cancer), and these compounds show anticancer activity at low concentration as compared to reference drug 5-fluorodeoxyuridine.
Page(s): 1887-1893
ISSN: 0975-0983(Online); 0376-4699(Print)
Source:IJC-B Vol.44B(09) [September 2005]

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