Asymmetric Enzymatic Synthesis of Allylic Amines: A Sigmatropic Rearrangement Strategy
作者:Christopher K. Prier、Todd K. Hyster、Christopher C. Farwell、Audrey Huang、Frances H. Arnold
DOI:10.1002/anie.201601056
日期:2016.4.4
Sigmatropic rearrangements, while rare in biology, offer opportunities for the efficient and selective synthesis of complex chemical motifs. A “P411” serine‐ligated variant of cytochrome P450BM3 has been engineered to initiate a sulfimidation/[2,3]‐sigmatropic rearrangement sequence in whole E. coli cells, a non‐natural function for any enzyme, providing access to enantioenriched, protected allylic amines
适马重排虽然在生物学中很少见,但为复杂化学基序的有效和选择性合成提供了机会。经过工程改造,细胞色素P450 BM3的“ P411”丝氨酸连接变体可在整个大肠杆菌细胞中启动亚磺酰亚胺化/ [2,3]-σ重排序列,这是任何酶的非天然功能,可提供对映体富集的,保护的烯丙基胺。酶中的五个突变大大增强了其对这一新功能的活性,证明了催化剂对具有挑战性的腈转移反应的进化能力。析出的催化剂还可以对非烯丙基硫化物进行高度对映选择性的酰亚胺化反应。