80866-77-9Relevant academic research and scientific papers
Preparation method of Eltrombopag
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, (2018/04/28)
The invention discloses a preparation method of Eltrombopag. The chemical name of Eltrombopag is 3-{(2Z)-2-[1-(3,4-xylyl)-3-methyl-5-oxo-1,5-dihydro-4H-parazole-4-ylidene]diazanyl}-2-hydroxy-3-biphenylcarboxylic acid-2-aminoethanol salt. The process of the preparation technique of the preparation method of Eltrombopag is simple, materials are easy to obtain, and the preparation method of Eltrombopag is cost-efficient and environment-friendly, can help realize industrialization, can promote the economic and technological development of the Eltrombopag active pharmaceutical ingredient, reduce the production cost, and is suitable for mass production.
A 2-chloro-6-fluoro anisole and wherein the intermediate preparation method
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Paragraph 0042; 0043, (2017/02/23)
The invention discloses a method for preparing 2-chlorine-6-fluoroanisole and midbodies of the 2-chlorine-6-fluoroanisole. The method for preparing the 2-chlorine-6-fluoroanisole comprises the following step that under the condition that the temperature ranges from 100 DEG C to 150 DEG C, a cleavage reaction is conducted on a compound shown as the formula V. A method for preparing a compound shown as the formula III comprises the following step that in a solvent and under catalysis of platinum carbon, a reduction reaction is conducted on a compound shown as the formula II and hydrogen, so that the compound shown as the formula III is obtained. A method for preparing the compound shown as the formula II comprises the following step that in a solvent and under catalysis of a catalyst, an etherification reaction is conducted on a compound shown as the formula I and sodium methylate, so that the compound shown as the formula II is obtained. According to the method for preparing the 2-chlorine-6-fluoroanisole, raw materials are low in price and easy to obtain, the production cost is low, reaction conditions are gentle, the yield is high, and the method is suitable for industrialized production.
