Title:
2,3-ジクロロピリジンの製造方法
Document Type and Number:
Japanese Patent JP2007523065
Kind Code:
A
Abstract:
A method for preparing 2,3-dichloropyridine is disclosed in which 3-amino-2-chloropyridine is contacted with an alkali metal nitrite in the presence of aqueous hydrochloric acid to form a diazonium salt; and the diazonium salt is subsequently decomposed in the presence of copper catalyst wherein at least about 50% of the copper is the copper(II) oxidation state.
Inventors:
Syapiro, Rafael
Application Number:
JP2006551437A
Publication Date:
August 16, 2007
Filing Date:
January 21, 2005
Export Citation:
Assignee:
E.I.DU PONT DE NEMOURS AND COMPANY
International Classes:
C07D213/61; B01J23/72; B01J27/122; C07D213/73; C07D213/82; C07B61/00
Domestic Patent References:
| JPS5030801A | 1975-03-27 |
Foreign References:
| US3838136A | 1974-09-24 |
Other References:
HERTOG DEN H J, RECUEIL, vol. V69, JPN5007001252, 1950, NL, pages 673 - 699, ISSN: 0001855011
ECKEHARD V., TETRAHEDRON LETTERS, vol. V26 N40, JPN5007001253, 1985, pages 4903 - 4906, ISSN: 0001855012
日本化学会編 新実験化学講座１４ 有機化合物の合成と反応（Ｉ）, JPN6011008556, 1977, pages 383 - 387, ISSN: 0001855013
HOUBEN-WEYL, METHODEN DER ORGANISCHEN CHEMIE, vol. Vol. 5/3, JPN6011008557, 1962, pages 846 - 848, ISSN: 0001855014
ECKEHARD V., TETRAHEDRON LETTERS, vol. V26 N40, JPN5007001253, 1985, pages 4903 - 4906, ISSN: 0001855012
日本化学会編 新実験化学講座１４ 有機化合物の合成と反応（Ｉ）, JPN6011008556, 1977, pages 383 - 387, ISSN: 0001855013
HOUBEN-WEYL, METHODEN DER ORGANISCHEN CHEMIE, vol. Vol. 5/3, JPN6011008557, 1962, pages 846 - 848, ISSN: 0001855014
Attorney, Agent or Firm:
Heikichi Odashima
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