Abstract
cis-8-Methoxy-1,3-diazaspiro[4.5]decane-2,4-dione, the key intermediate in the synthesis of spirotetramat, was synthesized by catalytic hydrogenation, oxidation, and Bucherer–Bergs reaction with 4-methoxycyclohexan-1-one as raw material. Spirotetramat was obtained in an overall yield of 20.4% by a multi-step reaction sequence including hydrolysis, esterification, acylation, intramolecular condensation, and O-acylation. The advantages of the proposed method are mild conditions, simple operation, and good to excellent yields in each step.
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The authors acknowledge the financial support from the Scientific and Technological Project of Henan Province (project no. 192102310142).
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Xu, G., Wang, J., Zhou, Y. et al. A High-Yield and Cost-Effective Synthesis of Spirotetramat. Russ J Org Chem 56, 1775–1778 (2020). https://doi.org/10.1134/S1070428020100176
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DOI: https://doi.org/10.1134/S1070428020100176