| 摘要 |
<p>1515398 Unsaturated 1-halo-2,2,2-tribromoethylesters BASF AG 14 Oct 1975 [16 Get 1974] 41973/75 Heading C2C [Also in Division C3] Novel compounds of formula where X is Cl or Br, R is H or methyl and R<SP>1</SP> is H or -COOCHXCBr 3 , are prepared by reacting an acid halide R<SP>2</SP>CH=CRCOX where R<SP>2</SP> is H or -COX with CBr 3 CHO in the presence of a Lewis acid, e.g. AlBr 3 or FeBr 3 , at 0-80‹ C. A solvent may be used. The product may be treated with MgO or aqueous NaHCO 3 , before distillation. 1 - Chloro - 2,2,2 - tribromoethyl and 1,2,2,2-tetrabromoethyl acrylates methacrylates, maleates and fumarates are specified products.</p> |
