A semisynthesis of 3'-O-ethyl-5,6-dihydrospinosyn J based on the spinosyn A aglycone
Spinetoram, a mixture of 3'-O-ethyl-5,6-dihydrospinosyn J (XDE-175-J, major component) and 3'-O-ethylspinosyn L (XDE-175-L, minor component), is a novel kind of green and efficient insecticide with a broad range of action against various insects. Nowadays, spinetoram is widely used in agri...
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doaj-d4c01d475cdc42ef80b67d4c639e34b62021-04-02T07:13:28ZengBeilstein-InstitutBeilstein Journal of Organic Chemistry1860-53972017-12-011312603260910.3762/bjoc.13.2571860-5397-13-257A semisynthesis of 3'-O-ethyl-5,6-dihydrospinosyn J based on the spinosyn A aglyconeKai Zhang0Shenglan Liu1Anjun Liu2Hongxin Chai3Jiarong Li4Lamusi A5School of Chemistry and Chemical Engineering, Beijing Institute of Technology, 5 South Zhongguancun Street, Haidian District, Beijing, ChinaSchool of Chemistry and Chemical Engineering, Beijing Institute of Technology, 5 South Zhongguancun Street, Haidian District, Beijing, ChinaSchool of Chemistry and Chemical Engineering, Beijing Institute of Technology, 5 South Zhongguancun Street, Haidian District, Beijing, ChinaSchool of Chemistry and Chemical Engineering, Beijing Institute of Technology, 5 South Zhongguancun Street, Haidian District, Beijing, ChinaSchool of Chemistry and Chemical Engineering, Beijing Institute of Technology, 5 South Zhongguancun Street, Haidian District, Beijing, ChinaInstitute of Grassland Research of CAAS, No. 120 Wulanchabu East Street, Saihan District, Hohhot, ChinaSpinetoram, a mixture of 3'-O-ethyl-5,6-dihydrospinosyn J (XDE-175-J, major component) and 3'-O-ethylspinosyn L (XDE-175-L, minor component), is a novel kind of green and efficient insecticide with a broad range of action against various insects. Nowadays, spinetoram is widely used in agriculture and food storage. This work reports a 7-step semisynthesis of 3'-O-ethyl-5,6-dihydrospinosyn J from spinosyn A aglycone. The C9–OH and C17–OH of the aglycone are successively connected to 3-O-ethyl-2,4-di-O-methylrhamnose and D-forosamine after selective protection and deprotection steps. Then, with 10% Pd/C as catalyst, the 5,6-double bond of the macrolide was selectively reduced to afford 3'-O-ethyl-5,6-dihydrospinosyn J. In addition, the 3-O-ethyl-2,4-di-O-methylrhamnose is synthesized from rhamnose which is available commercially, while the D-forosamine and aglycone are obtained via the hydrolysis of spinosyn A. High yields were obtained in each step, and all intermediates in the synthesis were characterized by 1H NMR, 13C NMR and MS techniques. This study can be helpful for developing an efficient chemical synthesis of spinetoram, and it also offers opportunities to synthesize spinosyn analogues and rhamnose derivatives.https://doi.org/10.3762/bjoc.13.2573-O-ethyl-2,4-di-O-methylrhamnoseprotecting groupssemisynthesisspinetoramspinosyn A |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Kai Zhang Shenglan Liu Anjun Liu Hongxin Chai Jiarong Li Lamusi A |
spellingShingle |
Kai Zhang Shenglan Liu Anjun Liu Hongxin Chai Jiarong Li Lamusi A A semisynthesis of 3'-O-ethyl-5,6-dihydrospinosyn J based on the spinosyn A aglycone Beilstein Journal of Organic Chemistry 3-O-ethyl-2,4-di-O-methylrhamnose protecting groups semisynthesis spinetoram spinosyn A |
author_facet |
Kai Zhang Shenglan Liu Anjun Liu Hongxin Chai Jiarong Li Lamusi A |
author_sort |
Kai Zhang |
title |
A semisynthesis of 3'-O-ethyl-5,6-dihydrospinosyn J based on the spinosyn A aglycone |
title_short |
A semisynthesis of 3'-O-ethyl-5,6-dihydrospinosyn J based on the spinosyn A aglycone |
title_full |
A semisynthesis of 3'-O-ethyl-5,6-dihydrospinosyn J based on the spinosyn A aglycone |
title_fullStr |
A semisynthesis of 3'-O-ethyl-5,6-dihydrospinosyn J based on the spinosyn A aglycone |
title_full_unstemmed |
A semisynthesis of 3'-O-ethyl-5,6-dihydrospinosyn J based on the spinosyn A aglycone |
title_sort |
semisynthesis of 3'-o-ethyl-5,6-dihydrospinosyn j based on the spinosyn a aglycone |
publisher |
Beilstein-Institut |
series |
Beilstein Journal of Organic Chemistry |
issn |
1860-5397 |
publishDate |
2017-12-01 |
description |
Spinetoram, a mixture of 3'-O-ethyl-5,6-dihydrospinosyn J (XDE-175-J, major component) and 3'-O-ethylspinosyn L (XDE-175-L, minor component), is a novel kind of green and efficient insecticide with a broad range of action against various insects. Nowadays, spinetoram is widely used in agriculture and food storage. This work reports a 7-step semisynthesis of 3'-O-ethyl-5,6-dihydrospinosyn J from spinosyn A aglycone. The C9–OH and C17–OH of the aglycone are successively connected to 3-O-ethyl-2,4-di-O-methylrhamnose and D-forosamine after selective protection and deprotection steps. Then, with 10% Pd/C as catalyst, the 5,6-double bond of the macrolide was selectively reduced to afford 3'-O-ethyl-5,6-dihydrospinosyn J. In addition, the 3-O-ethyl-2,4-di-O-methylrhamnose is synthesized from rhamnose which is available commercially, while the D-forosamine and aglycone are obtained via the hydrolysis of spinosyn A. High yields were obtained in each step, and all intermediates in the synthesis were characterized by 1H NMR, 13C NMR and MS techniques. This study can be helpful for developing an efficient chemical synthesis of spinetoram, and it also offers opportunities to synthesize spinosyn analogues and rhamnose derivatives. |
topic |
3-O-ethyl-2,4-di-O-methylrhamnose protecting groups semisynthesis spinetoram spinosyn A |
url |
https://doi.org/10.3762/bjoc.13.257 |
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