20227-41-2Relevant articles and documents
Synthesis of Rovafovir Etalafenamide (Part IV): Evolution of the Synthetic Process to the Fluorinated Nucleoside Fragment
Siler, David A.,Calimsiz, Selcuk,Doxsee, Ian J.,Kwong, Bernard,Ng, Jeffrey D.,Sarma, Keshab,Shen, Jinyu,Curl, Jonah W.,Davy, Jason A.,Garber, Jeffrey A. O.,Ha, Sura,Lapina, Olga,Lee, Jisung,Lin, Lennie,Park, Sangsun,Rosario, Mary,St-Jean, Olivier,Yu, Guojun
, p. 1263 - 1274 (2021/05/29)
Fluorinated nucleoside 1 is a key starting material in the synthesis of rovafovir etalafenamide (2), a novel nucleotide reverse transcriptase inhibitor under development at Gilead Sciences for the treatment of HIV. While an initial manufacturing route enabled the production of 1 to support clinical development, alternative approaches were explored to further enhance manufacturing effectiveness, improve processing time, reduce cost, and minimize the environmental impact. Toward this end, two new routes were developed to a key synthetic intermediate, which was converted to 1 using a new protecting group strategy. The new chemistry led to improvements in the manufacturing process while reducing the overall process mass intensity (PMI).
Discovery of novel purine nucleoside derivatives as phosphodiesterase 2 (PDE2) inhibitors: Structure-based virtual screening, optimization and biological evaluation
Qiu, Xiaoxia,Huang, Yiyou,Wu, Deyan,Mao, Fei,Zhu, Jin,Yan, Wenzhong,Luo, Hai-Bin,Li, Jian
, p. 119 - 133 (2017/11/30)
Phosphodiesterase 2 (PDE2) has received much attention for the potential treatment of the central nervous system (CNS) disorders and pulmonary hypertension. Herein, we identified that clofarabine (4), an FDA-approved drug, displayed potential PDE2 inhibitory activity (IC50 = 3.12 ± 0.67 μM) by structure-based virtual screening and bioassay. Considering the potential therapeutic benefit of PDE2, a series of purine nucleoside derivatives based on the structure and binding mode of 4 were designed, synthesized and evaluated, which led to the discovery of the best compound 14e with a significant improvement of inhibitory potency (IC50 = 0.32 ± 0.04 μM). Further molecular docking and molecular dynamic (MD) simulations studies revealed that 5′-benzyl group of 14e could interact with the unique hydrophobic pocket of PDE2 by forming extra van der Waals interactions with hydrophobic residues such as Leu770, Thr768, Thr805 and Leu809, which might contribute to its enhancement of PDE2 inhibition. These potential compounds reported in this article and the valuable structure-activity relationships (SARs) might bring significant instruction for further development of potent PDE2 inhibitors.
Syntheses of 2′-deoxy-2′-fluoro-β-d-arabinofuranosyl purine nucleosides via selective glycosylation reactions of potassium salts of purine derivatives with the glycosyl bromide
Sivets, Grigorii G.
supporting information, p. 268 - 271 (2016/01/12)
Syntheses of 9-(2-deoxy-2-fluoro-β-d-arabinofuranosyl)-guanine (1) and -adenine (2) were accomplished from readily available 1,3,5-tri-O-benzoyl-2-deoxy-2-fluoro-α-d-arabinofuranose (3). A new and efficient approach for the synthesis of 1-α-bromide was developed using the mild bromination of α-1-O-benzoate (3). Selective coupling reactions of the bromosugar with purine potassium salts followed by derivatization/and or deprotection of the intermediate blocked 2′-fluoro β-arabinonucleosides resulted in formation of the target compounds with high overall yields.
