Enantioselective Total Synthesis of Nigelladine A via Late-Stage C-H Oxidation Enabled by an Engineered P450 Enzyme.

Enantioselective Total Synthesis of Nigelladine A via Late-Stage C-H Oxidation Enabled by an Engineered P450 Enzyme.
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DOI:
10.1021/jacs.7b05196
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发表时间:
2017-08-02
影响因子:
15
通讯作者:
Stoltz BM
Stoltz BM
中科院分区:
化学1区
文献类型:
--
作者:
Loskot SA;Romney DK;Arnold FH;Stoltz BM

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报道了去甲二萜生物碱Nigelladine A的对映选择性全合成方法。从战略上讲,合成依赖于高级中间体的晚期C-H氧化。虽然传统的化学方法不能提供预期的结果,但工程细胞色素P450酶被用来在四个可氧化位置上实现化学和区域选择性的烯丙基C-H氧化。该酶变异体很容易从三种酶的集中文库中鉴定出来,无需广泛的筛选即可完成合成。
An enantioselective total synthesis of the norditerpenoid alkaloid nigelladine A is described. Strategically, the synthesis relies on a late stage C-H oxidation of an advanced intermediate. While traditional chemical methods failed to deliver the desired outcome, an engineered cytochrome P450 enzyme was employed to effect a chemo- and regioselective allylic C–H oxidation in the presence of four oxidizable positions. The enzyme variant was readily identified from a focused library of three enzymes, allowing for completion of the synthesis without the need for extensive screening.
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