Process Development of C–N Cross-Coupling and Enantioselective Biocatalytic Reactions for the Asymmetric Synthesis of Niraparib
作者:Cheol K. Chung、Paul G. Bulger、Birgit Kosjek、Kevin M. Belyk、Nelo Rivera、Mark E. Scott、Guy R. Humphrey、John Limanto、Donald C. Bachert、Khateeta M. Emerson
DOI:10.1021/op400233z
日期:2014.1.17
Process development of the synthesis of the orally active poly(ADP-ribose)polymerase inhibitor niraparib is described. Two new asymmetric routes are reported, which converge on a high-yielding, regioselective, copper-catalyzed N-arylation of an indazole derivative as the late-stage fragment coupling step. Novel transaminase-mediated dynamic kinetic resolutions of racemic aldehyde surrogates provided
描述了口服活性聚(ADP-核糖)聚合酶抑制剂尼拉帕利布的合成方法的发展。报道了两条新的不对称路线,它们收敛于吲唑衍生物的高产率,区域选择性,铜催化的N-芳基化,作为后期片段偶联步骤。外消旋醛替代物的新型转氨酶介导的动态动力学拆分提供了3-芳基-哌啶偶联伴侣的对映选择性合成。通过脱保护和盐复分解以分离所需的结晶盐形式,可实现C–N交叉偶联产物向最终API的转化。