Synthetic studies on oxindole spiro-lactones with thalliumd(III) trinitrate: A formal total synthesis of (±)-tryptoquivaline G |
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| Authors: | Takeshi Ohnuma Youichi Kimura Yoshio Ban |
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| Institution: | Faculty of Pharmaceutical Sciences, Hokkaido University, Sapporo 060, Japan |
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| Abstract: | (±)-Tryptoquivaline G was formally synthesized through shortened steps from tryptophan, in which oxidation with thallium(III) trinitrate(TTN) was effected at the crucial stage. The present work also constitutes the first synthesis of oxindole lactones carrying 2-alkyl quinazolinones. |
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