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New method for the synthesis of 3-chloro-2-(4-chloro-2-fluoro-5-hydroxyphenyl)-4,5,6,7-tetrahydro-2H-indazole  

Park, Chang-Min (Korea Research Institute of Chemical Technology)
Park, Kwan-Young (Korea Research Institute of Chemical Technology)
Kim, Hyoung-Rae (Korea Research Institute of Chemical Technology)
Song, Jong-Hwan (Korea Research Institute of Chemical Technology)
Hwang, In-Taek (Korea Research Institute of Chemical Technology)
Jeon, Dong-Ju (Korea Research Institute of Chemical Technology)
Publication Information
The Korean Journal of Pesticide Science / v.9, no.1, 2005 , pp. 23-25 More about this Journal
Abstract
3-Chloro-2-(4-chloro-2-fluoro-5-hydroxyphenyl)-4,5,6,7-tetrahydro-2H-indazole, which is the key intermediate of cyclic imide type compounds such as EK 5439 and S-275 series, were practically synthesized by the procedure of hydrolysis of by-products and were produced in the reaction of 2-(2-fluoro-4-chloro-5-hydroxyphenyl)-2,3a,4,5,6,7-hexahydroindazol-3-one with phosgene.
Keywords
herbicide; 3-chloro-2-(4-chloro-2-fluoro-5-hydroxyphenyl)-4,5,6,7-tetrahydro-2H-indazole; phosgene; Protox inhibitor;
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  • Reference
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