Synthesis method of ethyl 2,3-dichloro-4-nitrobenzoate
The invention belongs to the technical field of medical intermediates, and particularly relates to a synthesis method of ethyl 2,3-dichloro-4-nitrobenzoate. The synthesis method of ethyl 2,3-dichloro-4-nitrobenzoate in the invention provides a synthetic r
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Paragraph 0004; 0010; 0012
(2021/03/31)
A practical synthesis of 2,4-dichloro-3-methyl-6-nitrophenol
2,4-Dichloro-3-methyl-6-nitrophenol 2 was prepared by KOH/H2O hydrolysis of a product mixture obtained from chlorination of p-nitrotoluene in the presence of a phase transfer catalyst. A 95-99% yield of 2 based on 2,3,6-trichloro-4-nitrotoluene, 4 (major chlorination product) was achieved in >95% purity.
Ran,Pittman Jr.
p. 2785 - 2795
(2007/10/02)
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