METHOD FOR PREPARING DERIVATIVES OF AMINOBENZENE Russian patent published in 2004 - IPC

Abstract RU 2235718 C2

FIELD: organic chemistry, chemical technology.

SUBSTANCE: invention relates to a new method for preparing derivatives of aminobenzene of the formula (I):

wherein R¹ means halogen alkyl, halogenalkoxy-group; W represents CR³; R² and R³ represent independently hydrogen or chlorine atom, or their acid-additive salts. Method involves hydrogenolysis of compound of the formula (II):

or its acid-additive salt wherein R¹, R and W have above given values, and the hydrogenolysis reaction is carried out with metal or metal compound under reductive conditions. The prepared compound of the formula (I) can be subjected for purification by its treatment with strong acid in organic solvent and the following precipitation of salt formed. Method provides simplifying process of the end product due to carrying out the process at lower temperature and pressure as compared with the known method, and to enhance the yield of the end product.

EFFECT: improved preparing methods.

7 cl, 8 ex

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RU 2 235 718 C2

Authors

Ansel' Zhan-Ehrik

Perrehn-Zhane Zhill'

Vanzhelisti Manjuehl'

Versprumi P'Er

Dates

2004-09-10—Published

2000-03-30—Filed