SYNTHESIS OF 2-ALKYLTHIO (OR TRIFLUOROMETHYLTHIO)-2-HALOGENOETHENYL DERIVATIVES BY MEANS OF WITTIG (UNDER PHASE TRANSFER CONDITIONS) OR WITTIG-HORNER REACTIONS. APPLICATION IN THE FIELD OF PYRETHROIDS.

Article abstract of DOI:10.1016/S0040-4020(01)91800-9

A mixture of RSCHCl₂, Ph₃P and trans-caronaldehyde ethyl ester, treated with aq.NaOH under phase transfer conditions, gave the corresponding 2-alkylthio, 2-chloroethenyl derivative, the product of the Wittig reaction of a phosphorane