1033805-26-3Relevant articles and documents
Development of an Enzymatic Process for the Synthesis of the Key Intermediate of Telotristat Ethyl
Li, Hengyu,Zhang, Wenhe,Jiang, Xianyan,Wang, Huibin,Wang, Qi,Wang, Jiajun,Jia, Xian,Qin, Bin,You, Song
, p. 540 - 548 (2021)
(R)-1-(4-chloro-2-(3-methyl-1H-pyrazol-1-yl)phenyl)-2,2,2-trifluoroethan-1-ol [(R)-2] is a key chiral intermediate in the synthesis of telotristat ethyl, an anti-carcinoid syndrome drug. However, the synthetic methods for (R)-2 mainly include chemical reductions, rarely involving biocatalysis or bioreduction until now. Here, we report a method for obtaining (R)-2 by biocatalytic reduction of corresponding prochiral acetophenone (1) with bulky o-substitution using recombinant Lactobacillus fermentum short-chain dehydrogenase/reductase 1 (LfSDR1) as a biocatalyst. Further engineering of LfSDR1 variants could access asymmetric reduction of 1 and yield (R)-2 with a >99% ee and a >99% conversion. In addition, through the test of different co-solvents and a series of initial substrate concentrations, substrate 1 with the concentration of 60 g/L can be completely converted into (R)-2 on a preparative scale (1.13 g, 3.93 mmol, 75.6% isolated yield) in 24 hours. This study presents an efficient enzymatic process for the biocatalytic synthesis of key chiral intermediate (R)-2 in the synthesis of telotristat ethyl. (Figure presented.).
Application of asymmetric 1,2-addition reaction in compounding of telotristat ethyl midbody
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Paragraph 0020; 0021; 0022, (2018/03/01)
The invention provides a compounding method for a compound telotristat ethyl midbody as shown in formula (1). The method comprises the following steps: by taking a compound as shown in formula (2) as an initial raw material, performing grignard and asymmetric 1,2-addition reaction and finally acquiring the compound as shown in formula (1), thereby acquiring the telotristat ethyl midbody as shown in the specification. Compared with the prior art, the compounding method has the advantages that the telotristat ethyl midbody compounding process is simple and the compounding cost is low, the compounding method has the advantages that the compounding method is simple and feasible, the cost is low, the yield is higher, the product quality is high and the method is suitable for industrial production.
SPIROCYCLIC COMPOUNDS AS TRYPTOPHAN HYDROXYLASE INHIBITORS
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Page/Page column 68; 69; 71; 72, (2015/03/28)
The present invention is directed to spirocyclic compounds which are inhibitors of tryptophan hydroxylase (TPH), particularly isoform 1 (TPH1), that are useful in the treatment of diseases or disorders associated with peripheral serotonin including, for example, gastrointestinal, cardiovascular, pulmonary, inflammatory, metabolic, and low bone mass diseases, as well as serotonin syndrome, and cancer.