Construction of polysubstituted spiro[2.3] or [3.3] cyclic frameworks fused with a tosylated pyrrolidine promoted by visible-light-induced photosensitization

Literature Information

Publication Date 2021-11-04
DOI 10.1039/D1QO01373D
Impact Factor 5.281
Authors

Xintao Gu, Yin Wei


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Abstract

Herein, we presented a visible-light-induced intramolecular [2 + 2] cycloaddition of methylenecyclopropanes (MCPs) in the presence of a polypyridyl iridium(III) catalyst for the rapid construction of polysubstituted spiro[2.3] or [3.3] cyclic frameworks fused with a tosylated pyrrolidine in good yields under mild conditions. This newly developed photochemical protocol demonstrates a broad scope on the preparation of spirocyclic skeletons including diversified multi-spiral compounds containing dispiro[2.0.24.23] and dispiro[2.0.34.23] frameworks that might be useful in the synthesis of drug like molecules or the other functional materials. The mechanistic paradigm has been investigated on the basis of fluorescence emission quenching analysis, CV measurement and the control experiments, indicating that this visible-light photoinduced [2 + 2] cycloaddition proceeded through a triplet excited state.

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Organic Chemistry Frontiers
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Organic Chemistry Frontiers publishes high-quality research from across organic chemistry. Emphases are placed on studies that make significant contributions to the field of organic chemistry by reporting either new or significantly improved protocols or methodologies. Topics include, but are not limited to the following: Organic synthesis Development of synthetic methodologies Catalysis Natural products Functional organic materials Supramolecular and macromolecular chemistry Physical and computational organic chemistry

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