Developing an Asymmetric Transfer Hydrogenation Process for (<i>S</i>)-5-Fluoro-3-methylisobenzofuran-1(3<i>H</i>)-one, a Key Intermediate to Lorlatinib
作者:Shengquan Duan、Bryan Li、Robert W. Dugger、Brian Conway、Rajesh Kumar、Carlos Martinez、Teresa Makowski、Robert Pearson、Mark Olivier、Roberto Colon-Cruz
DOI:10.1021/acs.oprd.7b00187
日期:2017.9.15
Synthesis of (S)-5-fluoro-3-methylisobenzofuran-1(3H)-one (6), a key intermediate to lorlatinib, is described. A few synthetic methodologies, that is, boron reduction, enzymatic reduction, asymmetric hydrogenation, and asymmetric transfer hydrogenation, were evaluated for the chiral reduction of the substituted acetophenone intermediate (8). A manufacturing process, on the basis of the asymmetric transfer
描述了(S)-5-氟-3-甲基异苯并呋喃-1(3 H)-一(6)的合成,这是洛来替尼的关键中间体。对于取代的苯乙酮中间体的手性还原,评估了几种合成方法,即硼还原,酶还原,不对称氢化和不对称转移氢化(8)。在不对称转移氢化的基础上,开发了一种制造方法。此过程已成功扩大规模,以制备400公斤6。