Nitroalkanes as Versatile Nucleophiles for Enzymatic Synthesis of Noncanonical Amino Acids
作者:David K. Romney、Nicholas S. Sarai、Frances H. Arnold
DOI:10.1021/acscatal.9b02089
日期:2019.9.6
bond-forming reactions often require nucleophilic carbon species rarely compatible with aqueous reaction media, thus restricting their appearance in biocatalysis. Here we report the use of nitroalkanes as a structurally versatile class of nucleophilic substrates for C–C bond formation catalyzed by variants of the β-subunit of tryptophan synthase (TrpB). The enzymes accept a wide range of nitroalkanes to form
C–C键形成反应通常需要亲核碳物质,这种物质很少与水性反应介质相容,因此限制了它们在生物催化中的出现。在这里,我们报道了硝基链烷作为色氨酸合酶(TrpB)的β-亚基变体催化的CC键形成的结构通用类亲核底物。这些酶接受各种硝基链烷烃以形成非规范氨基酸,其中的硝基可以用作进一步修饰的基团。使用硝基烷亲核试剂极大地扩展了由TrpB变体制备的化合物的范围,并确立了硝基烷烃作为生物催化C–C键形成的有价值的底物类别。