Rh(II)-Catalyzed Ring Expansion of Cyclopropyl N-Tosylhydrazones to 1-Substituted Cyclobutenes,Synlett

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Rh(II)-Catalyzed Ring Expansion of Cyclopropyl N-Tosylhydrazones to 1-Substituted Cyclobutenes
Synlett ( IF 1.7 ) Pub Date : 2023-01-03 , DOI: 10.1055/a-1995-5960
Wenbai Ouyang ₁ , Jingfeng Huo ₁ , Jianbo Wang ₂

Affiliation

Cyclobutenes are highly useful synthetic intermediates as well as important motifs in functional molecules. Herein, we report a straightforward access toward monosubstituted cyclobutenes from cyclopropyl N-tosylhydrazone. 1,2-Aryl or -alkyl shift of the Rh(II) carbene intermediate plays the key role in this transformation.

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