149436-41-9Relevant articles and documents
Preparation method of iguratimod intermediate IV
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Paragraph 0023-0024; 0034; 0052, (2017/10/07)
The invention discloses a preparation method of an iguratimod intermediate IV, and belongs to the technical field of the pharmaceutical and chemical industry. The preparation method provided by the invention utilizes nitromethane instead of nitrobenzene as a solvent for preparing the iguratimod intermediate IV (alpha-amino-2-methoxy-4-methanesulfonamido-5-phenoxyphenyl ethanone hydrochloride); the prepared iguratimod intermediate IV has a weight yield up to 102-105% and a purity up to 99% or more than 99%. In addition, nitromethane as the solvent of the reaction further has advantages of having weak odor and less pollution, reducing damage to human body, facilitating post-treatment and purity improvement of products, and making final products without residues of genotoxic impurity nitrobenzene.
Synthesis and antiinflammatory activity of 7-methanesulfonylamino-6- phenoxychromones. Antiarthritic effect of the 3-formylamino compound (T-614) in chronic inflammatory disease models
Inaba, Takihiro,Tanaka, Keiichi,Takeno, Ryuko,Nagaki, Hideyoshi,Yoshida, Chosaku,Takano, Shuntaro
, p. 131 - 139 (2007/10/03)
A group of derivatives of 7-methanesulfonylamino-6-phenoxychromone (1) at the pyrone and phenoxy rings was synthesized starting with 4-chloro-3- nitroanisole and evaluated against acute and chronic inflammations in oral administration in animals. Significant potency in the rat models of carrageenin-induced edema (CPE) and adjuvant-induced arthritis (AA) was realized with 2'-fluoro and 2',4'-difluoro derivatives (9a and 9d), and 3- formylamino derivative (19a) and its 2'-fluoro and 2',4'-difluoro compounds (22a and 22d), displaying AA therapeutic effect of ED40=2.5-7.1 mg/kg/d for 7 d and AA prophylactic effect of 53-70% inhibition at the dosage of 3 mg/kg/d for 22 d. To identify a candidate for further pharmacological study, the five compounds were subjected to evaluation of their gastro-ulcerogenic liability, leading to selection of the fluorine-free compound 19a which did not cause acute ulceration at 300 mg/kg in oral administration in rats. Compound 19a (ED40=3.6 mg/kg in established AA) possessed good therapeutic efficacy against type II collagen-induced arthritis in DBA/1J mice with doses of 30 and 100 mg/kg, suggesting the development of 19a (designated T-614) as a prospective disease-modifying antirheumatic agent. In addition, a preparative-scale synthetic route to T-614 has been established.