Synthesis of Rovafovir Etalafenamide (Part III): Evolution of the Synthetic Process to the Phosphonamidate Fragment
作者:Andrea Ambrosi、Dustin A. Bringley、Selcuk Calimsiz、Jeffrey A. O. Garber、Huy Huynh、Sankar Mohan、Keshab Sarma、Jinyu Shen、Jonah Curl、Bernard Kwong、Olga Lapina、Edmund Leung、Lennie Lin、Andrew Martins、Teague McGinitie、Jaspal Phull、Ben Roberts、Mary Rosario、Bing Shi、Eric A. Standley、Li Wang、Xueqing Wang、Guojun Yu
DOI:10.1021/acs.oprd.0c00428
日期:2021.5.21
Phosphonamidate 1 is a key fragment in the assembly of rovafovir etalafenamide, a novel nucleotide reverse transcriptase inhibitor under development at Gilead Sciences for the treatment of HIV infection. An early manufacturing route, relying on simulated moving bed (SMB) chromatography for the separation of phosphorus diastereomers, was executed on scale to produce multiple batches of 1. However, developing
膦酰氨基甲酸酯1是rovafovir etalafenamide组装过程中的关键片段,该药物是Gilead Sciences研发的用于治疗HIV感染的新型核苷酸逆转录酶抑制剂。依靠模拟移动床(SMB)色谱法分离磷非对映异构体的早期生产路线可大规模生产1批。但是,考虑到与SMB相关的高生产成本,长交货期和高工艺质量强度(PMI),开发替代合成条件变得合乎需要。本文描述了几种改善这些因素的策略,包括差向异构化和不需要的(R)-磷非对映异构体,设计立体选择性方法以在磷处建立所需的(S)-构型,并鉴定条件或衍生物以允许选择性结晶。最终,开发了第二代至1的途径并进行了规模论证。新路线通过选择性结晶实现了磷非对映异构体的分离,不需要SMB,并提供了更低的PMI,成本和交货时间。