149457-03-4Relevant articles and documents
Preparation method of N-[4-(2-formylaminoacetyl)-5-hydroxy-2-phenoloxyphenyl]methanesulfonamide
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Paragraph 0020-0027, (2021/10/27)
The invention discloses a preparation method of N-[4-(2-formylaminoacetyl)-5-hydroxy-2-phenoloxyphenyl]methanesulfonamide. The preparation method comprises the following steps: with N-[4-(2-formylaminoacetyl)-5-methoxy-2-phenoloxyphenyl]methanesulfonamide as a raw material, dissolving the raw material in N,N-dimethylformamide (DMF) by using NaBr, and carrying out a demethylation reaction to obtain N-[4-(2-formylaminoacetyl)-5-hydroxy-2-phenoloxyphenyl]methanesulfonamide. The preparation method of N-[4-(2-formylaminoacetyl)-5-hydroxy-2-phenoloxyphenyl]methanesulfonamide provided by the invention is friendly to environment, simple in process, high in yield and low in cost.
Crystalline morphology of Iguratimod intermediate VI
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Paragraph 0055-0056, (2017/08/31)
The invention belongs to the technical field of pharmaceutical chemical engineering, and relates to a crystalline morphology of an Iguratimod intermediate VI (alpha-formamido-2-hydroxy-4-methanesulfonamide-5-phenoxyacetophenone). In addition, the invention further relates to a preparation method for two types of crystalline morphologies of Iguratimod intermediates VI. The two different types of crystalline morphologies of Iguratimod intermediates VI provided by the invention have good melting point and quality, the yield by weight is 90 to 95 percent, and the purity is 99.0 to 99.9 percent.
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.