Synthesis of 3,5,6-trichloropyridin-2-ol for insecticide intermediate

@inproceedings{Chao2011SynthesisO3,
  title={Synthesis of 3,5,6-trichloropyridin-2-ol for insecticide intermediate},
  author={Tian Chao},
  year={2011}
}
3,5,6-trichloropyridin-2-ol was synthesized by trichloroacetyl chloride with acrylonitrile in the presence of catalyst.The effects of solvents,reaction temperature,reaction time and reactants ratio on the yield were explored,and the optimal reaction condition was obtained as follows: 250 mL nitrobenzene,molar ratio of acrylonitrile to trichloroactyl chloride 1.4:1.0,reaction at 135℃ for 9 h.The yield could reach to 68% under this condition.