Synthesis of Potential Cytotoxic Quaternary Ammoniums by Oxidation of Eburnane Alkaloids
摘要:
Oxidation of vincamine and substituted analogs on ring-A was carried out in two steps: benzylic oxidation by Jones reagent and aromatization of ring-C with Hg(OAc)(2) or TI(OCOCF3)(3) in trifluoroacetic acid. Final compounds are quaternary ammoniums which exhibited weak cytotoxicity or no cytotoxicity according to substituents on ring-A and nature of ring-E.
Synthesis of Potential Cytotoxic Quaternary Ammoniums by Oxidation of Eburnane Alkaloids
摘要:
Oxidation of vincamine and substituted analogs on ring-A was carried out in two steps: benzylic oxidation by Jones reagent and aromatization of ring-C with Hg(OAc)(2) or TI(OCOCF3)(3) in trifluoroacetic acid. Final compounds are quaternary ammoniums which exhibited weak cytotoxicity or no cytotoxicity according to substituents on ring-A and nature of ring-E.
Oxidation of vincamine and substituted analogs on ring-A was carried out in two steps: benzylic oxidation by Jones reagent and aromatization of ring-C with Hg(OAc)(2) or TI(OCOCF3)(3) in trifluoroacetic acid. Final compounds are quaternary ammoniums which exhibited weak cytotoxicity or no cytotoxicity according to substituents on ring-A and nature of ring-E.