Synthesis 2021; 53(21): 4030-4041
DOI: 10.1055/a-1526-7839
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Facile Synthesis of Polysubstituted 2-Pyrones via TfOH-Mediated Ring Expansion of 2-Acylcyclopropane-1-carboxylates

Jiru Shao
a   Chang-Kung Chuang Institute, School of Chemistry and Molecular Engineering, East China Normal University, 500 Dongchuan Lu, Shanghai 200241, P. R. of China
,
Caiyun An
a   Chang-Kung Chuang Institute, School of Chemistry and Molecular Engineering, East China Normal University, 500 Dongchuan Lu, Shanghai 200241, P. R. of China
,
a   Chang-Kung Chuang Institute, School of Chemistry and Molecular Engineering, East China Normal University, 500 Dongchuan Lu, Shanghai 200241, P. R. of China
b   Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, East China Normal University, 3663 North Zhongshan Lu, Shanghai 200062, P. R. of China
› Institutsangaben
This work was sponsored by the Shanghai Pujiang Program (Grant No. 19PJ1402700), the Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning, the National Natural Science Foundation of China (No. 22071059), and the East China Normal University (ECNU).


Abstract

A facile route to polysubstituted 2-pyrones from readily available 2-acylcyclopropane-1-aryl-1-carboxylates mediated by TfOH is reported. The strongly donating 1-aryl group is important for directing the C–C bond cleavage of the donor-acceptor cyclopropane ring, which then leads to the formation of the 2-pyrone ring through lactonization.

Supporting Information



Publikationsverlauf

Eingereicht: 19. Mai 2021

Angenommen nach Revision: 10. Juni 2021

Accepted Manuscript online:
10. Juni 2021

Artikel online veröffentlicht:
08. Juli 2021

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