1127-01-1Relevant articles and documents
Production process of high-purity and high-yield spirodiclofen
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Paragraph 0047; 0057; 0067, (2019/03/08)
The invention relates to the technical field of synthesis of compounds and specifically relates to a production process of high-purity and high-yield spirodiclofen. The production process comprises the following steps: performing an addition reaction on cyclohexanone which is taken as a starting material, so as to obtain 1-cyano-cyclohexanol; hydrolyzing and esterifying the 1-cyano-cyclohexanol, so as to obtain 1-hydroxylethyl formate; performing a condensation ring-closing reaction on the 1-hydroxylethyl formate, so as to obtain an intermediate caproate; and performing a reaction on the caproate and 2, 2-dimethylbutyryl chloride, so as to obtain the spirodiclofen. According to the production process, the problem in the prior art that the prepared spirodiclofen is low in purity and yield is solved; the spirodiclofen prepared by adopting the production process is high in purity and yield; and in addition, the raw material for preparing the spirodiclofen is easily obtained, and the operation is convenient.
Spirodiclofen and spiromesifen - Novel acaricidal and insecticidal tetronic acid derivatives with a new mode of action
Bretschneider, Thomas,Benet-Buchholz, Jordi,Fischer, Reiner,Nauen, Ralf
, p. 697 - 701 (2007/10/03)
The broad spectrum acaricides spirodiclofen (BAJ2740, trade name: Envidor) and spiromesifen (BSN2060, trade name: Oberon) with an additional excellent activity against whiteflies, both belong to the new chemical class of tetronic acid derivatives discovered at Bayer CropScience during the 1990s. The discovery process starting from herbicidal PPO (protoporphyrinogen oxidase) chemistry, the synthetic routes leading to the products, and some insight into process development of central intermediates is given. Spirodiclofen and spiromesifen have a new mode of action (interference with lipid biosynthesis), show no cross-resistance to any resistant mite or whitefly field population and are therefore valuable tools for resistance management.