Title:
【発明の名称】3,5,6―トリクロロピリジン―2―オールを製造するための改良方法
Document Type and Number:
Japanese Patent JP2829342
Kind Code:
B2
Abstract:
A process for the preparation of 3,5,6-trichloropyridin-2-ol from trichloroacetyl chloride and acrylonitrile is improved by separately conducting the individual addition, cyclization and aromatization steps. By separating these steps, water and HCl, which are by-products of the latter steps, can be precluded from interfering with the earlier steps. The individual process steps have also been improved.
Inventors:
AARU GAASU PYUUZU
Application Number:
JP12285490A
Publication Date:
November 25, 1998
Filing Date:
May 11, 1990
Export Citation:
Assignee:
DAU CHEM CO ZA
International Classes:
B01J23/72; B01J27/122; C07B61/00; C07C253/30; C07C255/17; C07C255/19; C07D213/64; (IPC1-7): C07D213/64; B01J23/72; C07C253/30; C07C255/17
Domestic Patent References:
| JP5692866A |
Attorney, Agent or Firm:
Heiyoshi Odashima