Fu Aimin, Li Qin, Xiao Yang, Dong Jiaxin, Peng Yuanyang, Chen Yu, Tong Qingyi, Chen Chunmei, Zhang Yonghui, Zhu Hucheng. Diphenylemestrins A−E: diketopiperazine-diphenyl ether hybrids from Aspergillus nidulans[J]. Chinese Journal of Natural Medicines. DOI: 10.1016/S1875-5364(24)60662-X
Citation: Fu Aimin, Li Qin, Xiao Yang, Dong Jiaxin, Peng Yuanyang, Chen Yu, Tong Qingyi, Chen Chunmei, Zhang Yonghui, Zhu Hucheng. Diphenylemestrins A−E: diketopiperazine-diphenyl ether hybrids from Aspergillus nidulans[J]. Chinese Journal of Natural Medicines. DOI: 10.1016/S1875-5364(24)60662-X

Diphenylemestrins A−E: diketopiperazine-diphenyl ether hybrids from Aspergillus nidulans

  • A chemical investigation of secondary metabolites (SMs) from Aspergillus nidulans resulted in the identification of five novel dioxopiperazine (DKP)-diphenyl ether hybrids, designated as diphenylemestrins A−E (15). These compounds 15 represent the first known dimers combining DKP and diphenyl ether structures, with compound 4 featuring an uncommon dibenzofuran as the diphenyl ether component. The structural elucidation and determination of absolute stereochemistry were accomplished through spectroscopic analysis and electronic circular dichroism (ECD) calculations. Notably, diphenylemestrin C (3) exhibited moderate cytostatic activity against NB4 cells, with a half maximal inhibitory concentration (IC50) value of 21.99 μmol·L−1, and induced apoptosis at higher concentrations.
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