Development of a Scalable Synthesis for an Inhaled pan-JAK Inhibitor
作者:Alexander Gontcharov、Javier Magano、Lacey Samp、Tim L. Houck、Peter R. Rose、Anil Rane、Jotham W. Coe、Steven W. Kortum、SeungWon Chung、Peter Jones、David Pattavina
DOI:10.1021/acs.oprd.9b00253
日期:2019.9.20
A scalablesynthesis of a pan-JAK inhibitor is described. The original synthesis by the Medicinal Chemistry group has been modified to develop a new protecting group strategy, a 3-step telescoped synthesis to generate an imidazole ring from a nitrile, and a telescoped borylation/Suzuki coupling sequence as well as to replace HATU with process-friendly CDI in the final amidation step. Efficient API