| 摘要 |
NEW MATERIAL:The 3-amino-4-fluorophenol derivative of formulaI(X is Cl or Br). EXAMPLE:3-Amino-6-chloro-4-fluorophoneol. USE:Useful as a synthetic intermediate of 2-(4-chloro-2-fluoro-5-isopropoxyphenyl)- 5,6,7,8-tetrahydrophthalimide, etc. useful as herbicides. PROCESS:The compound of formulaIcan be prepared by the catalytic reduction of the nitrophenol derivative of formula II with hydrogen in ethanol solvent in the presence of a platinum dioxide catalyst at normal temperature and pressure. |
