Chemistry:Flazalone

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Flazalone is an anti-inflammatory drug that has not been approved as a medicine.[1][2][3]

Further Analogues

According to Shaomeng Wang and co-workers, replacement of the para-fluoro halogen with a meta,para-dichloro substitution arrangement resulted in dopamine reuptake inhibitors useful in treating cocaine addiction.[4][5] Whereas Diclazalone achieved a Ki of 10.9nM for the mazindol binding site (DAT), flazalone only achieved 5700nM for the same receptor (even weaker than for the phenindamine precursor which was 4420nM). However, the para-methyl compound was the one titled in the article publications. This had a Ki of 492nM for the mazindol binding site (DAT), which is more promising than flazalone if we are only talking about this receptor. For comparison consider WIN 35,428 versus RTI-32.

File:Diclazalone.svg
Diclazalone (Flazalone analog)

Synthesis

The synthesis has been covered:[6][7] Patents:[8][9] Alternate synthesis:[10] 62%:[11]

N.B. The p-fluoroacetophenone [403-42-9] has dual use in the synthesis of Enecadin [259525-01-4].

See also

References

  1. ↑ "The pharmacology of flazalone: a new class of anti-inflammatory agent". The Journal of Pharmacology and Experimental Therapeutics 198 (2): 473–480. August 1976. doi:10.1016/S0022-3565(25)30615-4. PMID 7668. 
  2. ↑ "Flazalone". Inxight Drugs. The National Center for Advancing Translational Sciences (NCATS). https://drugs.ncats.io/drug/5A1Y43ML91. 
  3. ↑ "Flazalone". Drugs of the Future 2 (3): 169. 1977. doi:10.1358/dof.1977.002.03.998237. ISSN 0377-8282. 
  4. ↑ "Discovery of a novel dopamine transporter inhibitor, 4-hydroxy-1-methyl-4-(4-methylphenyl)-3-piperidyl 4-methylphenyl ketone, as a potential cocaine antagonist through 3D-database pharmacophore searching. Molecular modeling, structure-activity relationships, and behavioral pharmacological studies". Journal of Medicinal Chemistry 43 (3): 351–60. February 2000. doi:10.1021/jm990516x. PMID 10669562. 
  5. ↑ "Molecular modeling, structure--activity relationships and functional antagonism studies of 4-hydroxy-1-methyl-4-(4-methylphenyl)-3-piperidyl 4-methylphenyl ketones as a novel class of dopamine transporter inhibitors". Bioorganic & Medicinal Chemistry 9 (7): 1753–64. July 2001. doi:10.1016/s0968-0896(01)00090-6. PMID 11425577. 
  6. ↑ The organic chemistry of drug synthesis. 2. Wiley. 1980. ISBN 9780471043928. 
  7. ↑ "Fluorophenyl-4-(p-fluorophenyl)-4-hydroxy-1-methyl-3-piperidyl ketone (flazalone): a novel non-steroidal anti-inflammatory agent". Arzneimittel-Forschung 22 (10): 1803. October 1972. PMID 4677080. 
  8. ↑ Daniel Draper Marshall, CH496700 & NL6811811 (1970 to Rexall Drug Chemical).
  9. ↑ M Draper & L Levy, U.S. Patent 3,849,578 (1974 to Riker Laboratories Inc).
  10. ↑ Charles M Leir, U.S. Patent 3,887,568 (1975 to Riker Laboratories Inc).
  11. ↑ "Synthèse et étude préliminaire de quelques arylpropanonamines substitués sur le cycle et leurs sels quaternaires". European Journal of Medicinal Chemistry 24 (6): 591–597. December 1989. doi:10.1016/0223-5234(89)90026-3. ISSN 0223-5234. 




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