Synthesis 2023; 55(02): 289-296
DOI: 10.1055/a-1878-8597
paper
Special Issue dedicated to Prof. Alain Krief

A Practical Approach to 6H-Indol-6-ones Enables the Formal Synthesis of γ-Lycorane

Yang Chen
a   Yunnan Key Laboratory of Southern Medicinal Resources, School of Chinese Materia Medica, Yunnan University of Chinese Medicine, 1076 Yuhua Road, Kunming, 650500, P. R. of China
,
Xin-Ting Hu
a   Yunnan Key Laboratory of Southern Medicinal Resources, School of Chinese Materia Medica, Yunnan University of Chinese Medicine, 1076 Yuhua Road, Kunming, 650500, P. R. of China
,
Xiao-Yan Xie
a   Yunnan Key Laboratory of Southern Medicinal Resources, School of Chinese Materia Medica, Yunnan University of Chinese Medicine, 1076 Yuhua Road, Kunming, 650500, P. R. of China
,
Dashan Li
a   Yunnan Key Laboratory of Southern Medicinal Resources, School of Chinese Materia Medica, Yunnan University of Chinese Medicine, 1076 Yuhua Road, Kunming, 650500, P. R. of China
,
Chun-Xia Zheng
a   Yunnan Key Laboratory of Southern Medicinal Resources, School of Chinese Materia Medica, Yunnan University of Chinese Medicine, 1076 Yuhua Road, Kunming, 650500, P. R. of China
,
You-Xi Zhang
b   School of Chemistry and Chemical Engineering, Yunnan Normal University, 798 Jvxian Street, Kunming, 650500, P. R. of China
,
Wen-Jing Wang
a   Yunnan Key Laboratory of Southern Medicinal Resources, School of Chinese Materia Medica, Yunnan University of Chinese Medicine, 1076 Yuhua Road, Kunming, 650500, P. R. of China
,
Rui Zhan
b   School of Chemistry and Chemical Engineering, Yunnan Normal University, 798 Jvxian Street, Kunming, 650500, P. R. of China
,
Li-Dong Shao
a   Yunnan Key Laboratory of Southern Medicinal Resources, School of Chinese Materia Medica, Yunnan University of Chinese Medicine, 1076 Yuhua Road, Kunming, 650500, P. R. of China
› Institutsangaben
The authors gratefully acknowledge financial support from the National­ Natural Science of Foundation of China (81960631), the Yunnan­ Fundamental Research Project (202001AS070038), the Ten Thousand Talent Plans for Young Top-Notch Talents of Yunnan Province (R.Z. and L.-D.S.), and the Start-up Fund of Yunnan University of Chinese Medicine (2019YZG03).


Abstract

We represented herein a two-step synthesis of 1-methyl-6H-indol-6-one which is an N-containing 6/5 fused bicyclic building blocks in Amaryllidaceae alkaloids. The key step featured is a ‘one-pot’ ozonolysis/reductive amination/cyclization of allylated cyclohexa-1,3-dione to give bicyclic compounds. Moreover, the formal total synthesis of natural product γ-lycorane could be achieved through a photo-promoted cyclization/oxidation cascade reaction from the resulting bicyclic intermediate.

Supporting Information



Publikationsverlauf

Eingereicht: 27. Mai 2022

Angenommen nach Revision: 20. Juni 2022

Accepted Manuscript online:
20. Juni 2022

Artikel online veröffentlicht:
11. August 2022

© 2022. Thieme. All rights reserved

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