59897-92-6

Usage

InChI:InChI=1/C10H15Cl3O2/c1-4-15-9(14)6-10(2,3)7(11)5-8(12)13/h5,7H,4,6H2,1-3H3

Downstream Products

• 55701-05-8 3-(2,2-dichlorovinyl)-2,2-dimethylcyclopropanecarboxylic acid 
• 59609-49-3 ethyl 3-(2,2-dichlorovinyl)-2,2-dimethylcyclopropanecarboxylate 
• 63142-57-4 ethyl (+/-)-trans-3-(2,2-dichlorovinyl)-2,2-dimethylcyclopropanecarboxylate 
• 63142-56-3 ethyl (+/-)-cis-3-(2,2-dichlorovinyl)-2,2-dimethylcyclopropanecarboxylate 

Relevant academic research and scientific papers

Method of producing cyclopropanecarboxylic acids and esters

Novel γ-lactone derivatives are provided. These lactone derivatives, when reacted with hydrogen halide in alcohol, yield γ-halogeno-δ-unsaturated carboxylic acid esters. This ring-opening process is useful for the purpose of increasing the yield of pyrethrin analogs which are of value as insecticides and agricultural chemicals. Thus, the γ-lactone derivatives by-produced in the production process for dihalogenovinyl chrysanthemumates are caused to undergo ring-opening reaction to yield the corresponding γ-halogeno-δ-unsaturated carboxylic acid esters which are important intermediates for said pyrethrin analogs.

Preparation of 1,1,1-trihalogeno-4-methyl-3-penten-2-ol

A 1,1,1-trihalogeno-4-methyl-3-penten-2-ol is prepared by thermally isomerizing 1,1,1-trihalogeno-4-methyl-4-penten-2-ol. The isomerization reaction may be catalyzed by an acid or a transition metal of Group 6B, 7B or 8 of the Periodic Table of Elements, or a compound thereof. The 1,1,1-trihalogeno-4-methyl-3-penten-2-ol thus prepared is useful as a synergist for herbicides or a physiologically active compound, and, additionally, is useful as a starting material for the synthesis of 2,2-dimethyl-3-(2',2'-dihalogenovinyl)-cyclopropane carboxylic esters which are active ingredients of insecticides.