173584-44-6Relevant articles and documents
Synthesis process of indoxacarb
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Paragraph 0015-0017, (2020/05/30)
The invention discloses a synthesis process of indoxacarb. The method comprises the following steps: reacting m-chlorobenzaldehyde serving as a raw material with malonic acid to remove monomolecular water and carbon dioxide to generate an intermediate SRCA, performing a hydrogenation reduction on the intermediate SRCA in an autoclave in the presence of a catalyst to obtain an intermediate SRCH, and cyclizing the SRCH by using hydrogen fluoride as a dehydrating agent to obtain the final product indoxacarb. The synthesis process is simple and easy to implement, energy is saved, consumption is reduced, the yield is increased, and good economic and environmental benefits are obtained.
A New Method for the Synthesis of Oxadiazine Insecticide Indoxacarb
Xu, Defeng,Guan, Jing,Xu, Xing,Gong, Shunze,Xu, Hui
, p. 1469 - 1473 (2016/09/23)
9-Fluorenylmethoxycarbonyl was a good protecting group in the field of chemical industry. In the present paper, a new approach for the synthesis of oxadiazine insecticides indoxacarb used 9-fluorenylmethoxycarbonyl as protected group, and triphosgene for chloroformylation. A convenient synthesis of 9-fluorenylmethoxycarbonylhydrazine can be achieved by the nucleophilic substitution reaction of 9-fluorenylmethyl chloroformate and hydrazine hydrate. 4a-Methyl-2-(9-fluorenylmethyl)-7-chloro-indeno [1,2e][1,3,4]oxadia zine-2,4a (3H,5H)-dicarboxylate can be produced via ketone -hydrazine crosslink reaction and cyclization. A preparation of carbamic acid-(chlorocarbonyl)-[(4-trifluoromethoxy) phenyl] me ester can be obtained by the chloroformylation of triphosgene. Finally, the deprotection of 9-fluorenylmethoxy carbonyl and condensation with carbamic acid-(chlorocarbonyl)-[(4-trifluoromethoxy) phenyl] me ester can afford indoxacarb in good yield. A new method for the synthesis of oxadiazine insecticides indoxacarb used 9-fluorenylmethoxycarbonyl-protected group to produce 9-?fluorenylmethoxycarb?onylhydrazine, then through the ketone–hydrazine crosslink reaction, cyclization, deprotection, chloroformylation, and condensation in good yield.