119018-29-0Relevant articles and documents
An Efficient and Practical Process for the Synthesis of Glimepiride
Tanwar, Dinesh Kumar,Surendrabhai, Vaghela Ravikumar,Gill, Manjinder Singh
, p. 2495 - 2498 (2017)
A novel and simple approach to the synthesis of glimepiride is reported. It involves the preparation of a carbamate of 3-ethyl-4-methyl-1 H -pyrrol-2(5 H)-one, followed by its reaction with 4-(2-aminoethyl)benzenesulfonamide to produce the intermediate sulfonamide. This sulfonamide, upon reaction with phenyl (trans -4-methylcyclohexyl)carbamate, gave glimepiride. This process avoids the use of phosgene, isocyanates, or chloroformates. Furthermore, sulfonation of the aryl group was eliminated, rendering the product free of the impurities reported in earlier processes.
Preparation method of glimepiride intermediate
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Paragraph 0023; 0024; 0025; 0028, (2019/10/01)
The invention relates to a preparation method of a glimepiride intermediate compound I, and belongs to the technical field of preparation of raw material medicines. The preparation method comprises the following steps: reacting a compound II with diphenyl carbonate under the catalysis of an alkali (referring to Synlett, 28(18), 2495-2498; 2017) to prepare a compound IX; and adding a compound IX and 4-(2-aminoethyl)benzenesulfonamide according to a ratio of 1:1, adding a weak acid, adding isopropanol, and performing heating for a refluxing reaction. The invention provides the preparation methodof the glimepiride intermediate with a high purity.
Preparation method of hypoglycemic drug-glimepiride
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Paragraph 0018; 0019, (2018/06/15)
The invention discloses a preparation method of a hypoglycemic drug-glimepiride. The chemical name of the hypoglycemic drug-glimepiride is 1-[4-[2-(3-ethyl-4-methyl-2-oxo-3-pyrroline-1-formamido)-ethyl]-benzenesulfonyl]-3-(trans-4- methyl cyclohexyl)-urea, the chemical formula of the hypoglycemic drug-glimepiride is C24H34N4O5S, and the structural formula of the hypoglycemic drug-glimepiride is described in the description. The preparation method is simple in process, short in synthetic route and high in yield, and especially increases the yield of 2-(3-ethyl-4-methyl-2-oxo-3-pyrroline-1-formamido)ethyl benzene sulfonic acid greatly; the application of chlorosulfonic acid has great influence on a sulfonation effect; compared with sulfonating agents such as concentrated sulfuric acid and fuming sulfuric acid which are used in the prior art, the chlorosulfonic acid has higher sulfonating capacity, so that the production of the glimepiride is further facilitated; the preparation method iseasy in obtaining of raw materials, economical and environment-friendly, high in product yield and product purity, and beneficial to industrialization.