申请人:E I DU PONT DE NEMOURS AND COMPANY
公开号:US20170197907A1
公开(公告)日:2017-07-13
A method for preparing 3-methyl-2-nitrobenzoic acid is disclosed wherein 1,3-dimethyl-2-nitrobenzene is combined with an oxidation catalyst in the presence of an oxygen source and an initiator, provided that less than 99% of the 1,3-dimethyl-2-nitrobenzene is oxidized.
A method for preparing compounds of Formula 7 and Formula 11 is also disclosed wherein the method is characterized by using 3-methyl-2-nitrobenzoic acid as prepared by the method disclosed above.
wherein R
1
is C
1
-C
7
alkyl, C
3
-C
6
cycloalkyl or C
4
-C
7
alkylcycloalkyl