C - Chemistry – Metallurgy – 07 – D
Patent
C - Chemistry, Metallurgy
07
D
260/329.4
C07D 333/46 (2006.01)
Patent
CA 1140139
27,8 TITLE AN IMPROVED PROCESS FOR THE PREPARATION OF SULFUR YLIDE INTERMEDIATES OF INSECTICIDAL PYRETHROIDS ABSTRACT The invention is an improved process for the prep- aration of lower alkyl esters of tetrahydrothiophenium car- boxymethylide intermediates of insecticidal pyrethroids, and to insecticidal pyrethroids derived from said ylides.
356426
American Cyanamid Company
Smart & Biggar
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