70603-89-3Relevant academic research and scientific papers
Preparation of halogenovinyl-γ-butyrolactones
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, (2008/06/13)
Halogenovinyl-γ-butyralactones, used as intermediates in the preparation of insecticidally active cyclopropanecarboxylic acid esters, and of the formula STR1 in which Hal represents F, Cl or Br, X represents H, F, Cl or Br and R1 and R2, which may be identical or different, each represents C1-4 -alkyl or R1 and R2, together with the adjacent C atom, form a cycloaliphatic ring with up to 7 C atoms, are produced by basic de-acetylation of the novel corresponding α-acetyl compounds. Syntheses are given for preparing the acetyl compounds, including novel intermediates of the formulas STR2
