203313-47-7Relevant articles and documents
A High-Yield and Cost-Effective Synthesis of Spirotetramat
Mao, Longfei,Wang, Jiahao,Xu, Guiqing,Zhou, Yingjie
, p. 1775 - 1778 (2020/12/01)
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.
CIS-ALKOXY-SUBSTITUTED SPIROCYCLIC 1-H-PYRROLIDINE-2,4-DIONE DERIVATIVES SERVING AS PESTICIDES
-
Page/Page column 87-88, (2008/06/13)
The invention relates to novel cis-alkoxy-substituted spirocyclic 1-H-pyrrolidine-2,4-dione derivatives of formula (I), in which A, G, X and Y have the meanings as cited in the description, to a number of methods for producing these derivatives and to the