Synlett 2025; 36(04): 402-406
DOI: 10.1055/a-2341-9274
letter

Efficient Synthesis of Fluorene Derivatives by Benzannulation of Indene Dienes with Benzoylacetonitrile Catalyzed by Lipase

Wenhan Shi
a   Key Laboratory of Molecular Enzymology and Engineering of Ministry of Education, School of Life Sciences, Jilin University, Changchun, 130023, P. R. of China
,
Yiyao Wang
a   Key Laboratory of Molecular Enzymology and Engineering of Ministry of Education, School of Life Sciences, Jilin University, Changchun, 130023, P. R. of China
c   College of Life Science, Jilin Agricultural University, Changchun, 130118, P. R. of China
,
Fengxi Li
a   Key Laboratory of Molecular Enzymology and Engineering of Ministry of Education, School of Life Sciences, Jilin University, Changchun, 130023, P. R. of China
,
Hanqing Xie
a   Key Laboratory of Molecular Enzymology and Engineering of Ministry of Education, School of Life Sciences, Jilin University, Changchun, 130023, P. R. of China
,
Lei Wang
a   Key Laboratory of Molecular Enzymology and Engineering of Ministry of Education, School of Life Sciences, Jilin University, Changchun, 130023, P. R. of China
,
Rui Zhao
b   China–Japan Union Hospital of Jilin University, Changchun 130000, P. R. of China
,
Zhi Wang
a   Key Laboratory of Molecular Enzymology and Engineering of Ministry of Education, School of Life Sciences, Jilin University, Changchun, 130023, P. R. of China
› Institutsangaben
We gratefully acknowledge the Science and Technology Development Program of Jilin Province (No. YDZJ202201ZYTS102).


Abstract

An enzymatic method was developed for the synthesis of fluorene derivatives by benzannulation of indene dienes with benzoylacetonitrile in a nonaqueous solvent. Under the optimal reaction condition [indene diene (0.5 mmol), benzoylacetonitrile (0.5 mmol), ethanol (2 mL), lipase from porcine pancreas (5 mg), 50 °C, 24 h], fluorenes bearing various groups were obtained in satisfactory yields (83–93%). This method not only offers a significant advancement in the synthesis of fluorene derivatives, but also represents a new application of lipase in promiscuous enzyme catalysis.

Supporting Information



Publikationsverlauf

Eingereicht: 28. Mai 2024

Angenommen nach Revision: 10. Juni 2024

Accepted Manuscript online:
10. Juni 2024

Artikel online veröffentlicht:
12. Juli 2024

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