709031-30-1Relevant articles and documents
Synthetic method of saxagliptin intermediate
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Paragraph 0032; 0039-0040; 0043; 0050-0051, (2021/11/21)
The invention belongs to the technical field of organic synthesis, and particularly relates to a synthetic method of a saxagliptin intermediate. The intermediate is compound I, compound A2 is taken as a raw material, and compound I is obtained through hydrolysis hydroxylation, hydrogenation and amino protecting reaction. The compound A2 is oxidized by taking 1 - adamantane methanol as a raw material. The resulting compound A2. Due to the fact that the synthetic route is shortened, the production cycle is shortened, and the production cost is greatly reduced. The compound A2 to the compound A3, the hydrolysis and the hydroxylation are synthesized in one step in one step, the amount of waste acid water is greatly reduced, and the optical chiral protecting group is kept off, and the chiral value of the final compound I is greatly improved. The whole reaction process is mild in condition, free of harsh anhydrous anaerobic reaction, greatly reduced in wastewater amount and extremely high in product optical activity.
A process for preparing hydroxy adamantane glycine derivatives
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, (2017/07/14)
The invention aims to provide a novel and simple synthesis route of a hydroxyadamantylglycine derivative represented by the formula I, namely (aS)-a-[[(1,1-dimethylethoxy)carboxyl]-amino]-1-(3-hydroxyadamantyl)-acetic acid) or salts of the derivative through developing a novel compound. A novel compound namely 2(aS)-a-amino-1-adamantyl-acetamide represented by the formula III is taken as the primary raw material and then is subjected to hydrolysis reactions and hydroxy group introduction so as to obtain the (aS)-a-[[(1,1-dimethylethoxy)carboxyl]-amino]-1-(3-hydroxyadamantyl)-acetic acid) represented by the formula I or salts of the derivative. The invention further provides a synthesis method of the novel compound represented by the formula III. The synthesis method can solve the disadvantages that the cost of enzyme catalyzed reactions is high, the enzyme catalyzed reactions are unstable, the chemical catalysis method has a low ee value, and the reaction product is not easy to purify in the prior art, and thus is more suitable for industrial production.
PROCESS FOR PREPARING DIPEPTIDYL PEPTIDASE IV INHIBITORS AND INTERMEDIATES THEREFOR
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, (2016/07/27)
A process for preparing an amine of the structure which comprises a. treating an aqueous solution of a keto acid of the structure with ammonium formate, nicotinamide adenine dinucleotide, dithiothreitol and partially purified phenylalanine dehydrogenase and/or formate dehydrogenase enzyme (PDH/FDH); and b. adjusting pH of the reaction mixture with sodium hydroxide to form the desired amine which is substantially free of undesirable excess ammonium ions.