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Furan-Site Bromination and Transformations of Fraxinellone as Insecticidal Agents Against Mythimna separata Walker.


ABSTRACT: Furan ring of limoninoids is critical in exhibiting insecticidal activity. Herein, fraxinellone (1) was used as a template of furan-containing natural products and a series of its derivatives was synthesized by selective bromination in good yields on gram-scale and following Suzuki-Miyaura or Sonogashira coupling reactions in moderate to good yields. Bromination of limonin (9) was also accomplished without altering other functional groups in high yield. Furthermore, an evaluation of insecticidal activity against the instar larvae of Mythimna separata showed that derivatives 2, 3b, 3g, 5a, 5d and 5h displayed more potent insecticidal activity than 1 and toosendanin.

SUBMITTER: Dong QM 

PROVIDER: S-EPMC5976728 | biostudies-literature | 2018 May

REPOSITORIES: biostudies-literature

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Furan-Site Bromination and Transformations of Fraxinellone as Insecticidal Agents Against Mythimna separata Walker.

Dong Qing-Miao QM   Dong Shuai S   Shen Cheng C   Cao Qing-Hao QH   Song Ming-Yu MY   He Qiu-Rui QR   Wang Xiao-Ling XL   Yang Xiao-Jun XJ   Tang Jiang-Jiang JJ   Gao Jin-Ming JM  

Scientific reports 20180530 1


Furan ring of limoninoids is critical in exhibiting insecticidal activity. Herein, fraxinellone (1) was used as a template of furan-containing natural products and a series of its derivatives was synthesized by selective bromination in good yields on gram-scale and following Suzuki-Miyaura or Sonogashira coupling reactions in moderate to good yields. Bromination of limonin (9) was also accomplished without altering other functional groups in high yield. Furthermore, an evaluation of insecticidal  ...[more]

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