Synthesis
DOI: 10.1055/a-2560-8048
paper

N-Fluorobenzenesulfonimide-Mediated Oxidative Rearrangement of Tetrahydro-β-carbolines

Yuzhen Dong
a   College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 2042, P. R. of China
,
Jiapei Zhang
b   School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, P. R. of China
,
Daoshan Yang
a   College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 2042, P. R. of China
,
Lei Liu
b   School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, P. R. of China
c   Shenzhen Research Institute of Shandong University, Shenzhen 518057, P. R. of China
,
b   School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, P. R. of China
c   Shenzhen Research Institute of Shandong University, Shenzhen 518057, P. R. of China
› Institutsangaben
This work was financially supported by the National Natural Science Foundation of China (No. 22425108, 22201165), the National Basic Research Program of China (2024YFA1509202), and the Taishan Scholar Program at Shandong Province, Shenzhen Special Funds (JCYJ20220530141205011).


Abstract

Oxidative rearrangement of tetrahydro-β-carbolines is recognized as a biosynthetic process and represents one of the most popular and efficient approaches for the synthesis of spiro[pyrrolidine-3,3]oxindoles, which belong to an important structural scaffold that widely exists in a wide spectrum of pharmaceutically active compounds and natural products. Although halogenated reagents including t-BuOCl, NBS, and NIS, have been frequently used as oxidants for this oxidative rearrangement, fluorinated reagents have not been successfully employed. Here, a universal and efficient oxidative rearrangement of tetrahydro-β-carbolines using N-fluorobenzenesulfonimide (NFSI) as the oxidant is reported, affording a variety of spiro[pyrrolidine-3,3]oxindoles in excellent yields (90–99%). Owing to the increased oxidative ability and hardness of fluorine over other halogens, this method would be instrumental to rapid access of structurally diverse spirooxindoles.

Supporting Information



Publikationsverlauf

Eingereicht: 11. Februar 2025

Angenommen nach Revision: 17. März 2025

Accepted Manuscript online:
17. März 2025

Artikel online veröffentlicht:
10. April 2025

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