1132832-75-7Relevant articles and documents
Preparation method of 2-(4-fluorophenyl)-5-[(5-bromo-2-methylphenyl)methyl]thiophene
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Paragraph 0033; 0037; 0038, (2020/06/17)
The invention relates to the technical field of medicine synthesis, and particularly discloses a preparation method of 2-(4-fluorophenyl)-5-[(5-bromo-2-methylphenyl)methyl]thiophene. The preparation method comprises the following steps: by taking a nitrogen-doped carbon material loaded with transition metal as a catalyst, introducing hydrogen, and performing hydrogenation reduction on 2-methyl-5-bromophenyl-2-(4-fluorophenyl)thiophene ketone at 50-180 DEG C, thereby obtaining 2-(4-fluorophenyl)-5-[(5-bromo-2-methylphenyl)methyl]thiophene. The preparation method provided by the invention has the characteristics of the high product yield, high purity, the low cost, no toxicity and no pollution, and overcomes the defects in the traditional preparation process of 2-(4-fluorophenyl)-5-[(5-bromo-2-methylphenyl)methyl]thiophene.
Synthesis method of canagliflozin intermediate
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, (2018/03/26)
The invention relates to a synthesis method of a canagliflozin intermediate. Concretely, succinyl oxide and fluorobenzene are used as starting raw materials to be prepared into the canagliflozin crucial intermediate of 2-(4-fluorophenyl)-5-[(5-halogen-2-methyl phenyl)methyl]thiophene through the steps of Friedel-Crafts acylation ring opening, thiophene ring preparation, Friedel-Crafts acylation coupling, reduction and the like. The cheap succinyl oxide is used for preparing the thiophene ring, so that the Suzuki coupling reaction and Grignard reaction are avoided; the use of heavy metal reagents of palladium and the like is avoided; the production process is simplified; the product yield and the quality are improved; the environment pollution is reduced; the production cost is reduced.
Deuterium-modified carbon glycoside derivate
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Paragraph 0089; 0090; 0091; 0098; 0099; 0100, (2016/12/26)
The invention belongs to the field of medinal chemistry and relates to a deuterium-modified carbon glycoside derivate, in particular to a compound shown in the formula I. The invention further relates to a preparation method of the deuterium-modified carbon glycoside derivate, a medicine composition comprising the deuterium-modified carbon glycoside derivate and application of the deuterium-modified carbon glycoside derivate or the medicine composition thereof for preparing medicine for treating diabetes.