1380521-88-9Relevant articles and documents
A west he row sandbank and its salt synthesis method (by machine translation)
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, (2017/08/04)
The invention discloses a west he row sandbank and its salt synthesis method, in order to 2, 4, 5 - trifluorobenzene acetic acid as the starting material, through esterification, reduction, oxidation and Witting reaction, to obtain 4 - (2, 4, 5 - trifluorophenyl) - 2 - butene ethyl ester, or passes through the reduction, oxidation and Witting reaction after, to obtain 4 - (2, 4, 5 - trifluorophenyl) - 2 - butene ethyl ester. Then in BuLi or six methyl two silicon and nitrogen under the action of the alkane-sodium, with chiral amine on the hydroamination reaction, framed asymmetric amination product, through ester, condensation, hydrogenated three-step reaction to obtain sitagliptin. The west he of the spit of fland synthesis method of raw materials are cheap and easy to obtain, steps are less, the operation is easy, can be effectively reduced. The method can be the high purity of the sitagliptin, the salt of the phosphoric acid obtained after HPLC purity and sitagliptin ee values are in 99% or more, can be applied to the medical field. (by machine translation)