Title:
ジフェニルエーテル化合物のニトロ化方法
Document Type and Number:
Japanese Patent JP3886533
Kind Code:
B2
Abstract:
A process for the preparation of a compound of general formula I: wherein: R1 is hydrogen or C1-C6 alkyl, C2-C6 alkenyl or C2-C6 alkynyl (any of which may optionally be substituted with one or more substituents selected from halogen and OH) or COOH, COH, COOR , COR6, CONR4R5 or CONHSO2R4; R4 and R5 are each independently hydrogen or C1-C4 alkyl optionally substituted with one or more halogen atoms; R6 is a halogen atom or a group R4; R2 is hydrogen or halo; R3 is C1-C4 alkyl, C2-C4 alkenyl or C2-C4 alkynyl, any of which may optionally be substituted with one or more halogen atoms, or halo; the process comprising reacting a compound of general formula II: wherein R1, R2 and R3 are as defined for general formula I; with a nitrating agent comprising nitric acid or a mixture of nitric and sulphuric acids in the presence of an organic solvent and in the presence of acetic anhydride, characterised in that the molar ratio of acetic anhydride to compound of general formula I is from about 1:1 to 3:1.
Inventors:
Brown, stephen martin
Max Warsie, James Peter
Max Warsie, James Peter
Application Number:
JP51173397A
Publication Date:
February 28, 2007
Filing Date:
August 06, 1996
Export Citation:
Assignee:
Syngenta Limited
International Classes:
C07C205/38; C07C201/08; C07C205/44; C07C205/45; C07C205/57; C07C205/59; C07C231/12; C07C235/44; C07C303/40; C07C311/51
Domestic Patent References:
| JP2028140A | ||||
| JP49055654A |
Foreign References:
| US4743703 | ||||
| US4429146 |
Attorney, Agent or Firm:
Kazuo Shamoto
Shosuke Imai
Tadashi Masui
Tadahiko Kurita
Yasushi Kobayashi
Hiroko Ejiri
Shosuke Imai
Tadashi Masui
Tadahiko Kurita
Yasushi Kobayashi
Hiroko Ejiri