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Cinnamic acid derived oxazolinium ions as novel cytotoxic agents

Authors
Journal
European Journal of Medicinal Chemistry
0223-5234
Publisher
Elsevier
Publication Date
Volume
37
Issue
7
Identifiers
DOI: 10.1016/s0223-5234(02)01375-2
Keywords
  • Cinnamic Acid
  • Cytotoxic Agents
  • Oxazolinium Salts

Abstract

Abstract Substituted cinnamoyl chlorides, 11, were converted into (2-hydroxyethyl)-oxazolinium chlorides 14, N,N-bis-(2-chloroethyl)amides 16 and (2-chloroethyl)-oxazolinium chlorides 17. Although derivatives 14 which possess electron-donating substituents (Me or MeO) were more potent than those substituted by electron-withdrawing groups (NO 2, Cl or CF 3), the difference in cytotoxic actin was not significant. Modification of the lipophilic character in a series of alkoxy-substituted derivatives 14 led to more active compounds, where 14t that possesses a 4-octyloxy-phenyl-substituent was the most potent and displayed cytotoxic activity in the μM range. It is assumed that the oxazolinium salts act as alkylating agents, and undergo nucleophilic attack on the methylene adjacent to the ring oxygen where the oxazolinium ring parallels the aziridinium ring intermediate found in classical alkylating agents.

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