2-trifluoromethyl-4-chlorobenzalchloride and 2-methyl-3-nitro-5-

Details 2-trifluoromethyl-4-chlorobenzalchloride and 2-methyl-3-nitro-5- 2-trifluoromethyl-4-chlorobenzalchloride and 2-methyl-3-nitro-5-

1995-06-06

1997-02-04

Burn, Brian M.

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

570124, 570144, C07C20506

Patent

active

056000367

ABSTRACT:
2-Trifluoromethyl-4-chloro-benzalchloride and 2-methyl-3-nitro-5-chlorobenzotrifluoride, are intermediates in a process of preparing 2-methyl-3-aminobenzo-trifluoride. In this process, 2-trifluoromethyl-4-chlorobenzal-chloride is prepared by chlorinating o-trifluoromethylbenzalhalide, and 2-methyl-3-nitro-5-chlorobenzotrifluoride is prepared at first by hydrogenating the 2-trifluoro-methyl-4-chlorobenzalhalide to form a 2-methyl-5-monochlorobenzotrifluoride and then by nitrating the 2-methyl-5-monochlorobenzotrifluoride. Following this process, 2-methyl-3-aminobenzotrifluoride (MA-BTF) is prepared by hydrogenating the 2-methyl-3-nitro-5-chlorobenzotrifluoride. The thus prepared 2-methyl-3-aminobenzotrifluoride is useful as an intermediate in preparing medicines, agricultural chemicals and other chemical products.

REFERENCES:
patent: 3839344 (1974-10-01), Sherlock
patent: 3891761 (1975-06-01), Sherlock
patent: 4132737 (1979-01-01), Molloy
patent: 4209464 (1980-06-01), Steinman et al.
patent: 4503276 (1985-03-01), Nickson
patent: 4749813 (1988-06-01), Marhold et al.
patent: 4831193 (1989-05-01), Lamendola et al.
CA 73:87890u (Oct. 26, 1970).
CA 103:12316f (Oct. 14, 1985).

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