64667-33-0

Usage

InChI:InChI=1/C9H14Cl4O2/c1-8(2,5-7(14)15-3)6(10)4-9(11,12)13/h6H,4-5H2,1-3H3

Upstream product

• 56-23-5 tetrachloromethane 
• 63721-05-1 methyl 3,3-dimethyl-4-penteneoate 

Downstream Products

• 63406-18-8 methyl 2,2-dimethyl-3-(2,2,2-trichloroethyl)cyclopropane-1-carboxylate 
• 61898-95-1 cis,trans methyl 2,2-dimethyl-3-(2',2'-dichlorovinyl)-cyclopropanecarboxylate 
• 59897-93-7 methyl trans-3-(2,2-dichloroethenyl)-2,2-dimethylcyclopropanecarboxylate 

Relevant academic research and scientific papers

A stereoselective synthesis of methyl trans-3-(2,2-dichloroethenyl)- 2,2-dimethylcyclopropanecarboxylate

A convenient method is described for the stereoselective synthesis of methyl trans-3-(2,2-dichloroethenyl)-2,2-dimethylcyclopropanecarboxylate (5) via methyl 3,3-dimethyl-4,6,6,6-tetrachlorohexanoate (4) as a key intermediate, which was obtained by addition of carbon tetrachloride to methyl 3,3-dimethyl-4-pentenoate (3). Treatment of (4) with sodium methoxide in a single-vessel via methyl 4,6,6-trichloro-3,3-dimethyl-5-hexenoate (6) gave trans-rich (5) in excellent yield.

Process for preparing halogenated compounds

A process for preparing halogenated compounds of formula RCY(Z)CH2 CH(X)C(CH3)CH2 COR1 where X, Y and Z are halo, R is alkyl, halo, haloalkyl or aryl, and R1 is hydroxy, halo, alkoxy, alkyl or haloalkyl, or the residue of a pyrethroidal alcohol, in which a compound of formula CH2 =CHC(CH3)2 COR1 is reacted with a sulphonyl halide of formula RCY(Z)SO2 X. The process avoids the use of volatile halocarbons in the production of valuable intermediates for insecticides.