An Enzymatic Platform for Primary Amination of 1-Aryl-2-alkyl Alkynes.

An Enzymatic Platform for Primary Amination of 1-Aryl-2-alkyl Alkynes.
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DOI:
10.1021/jacs.1c11340
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发表时间:
2022-01-12
影响因子:
15
通讯作者:
Arnold FH
Arnold FH
中科院分区:
化学1区
文献类型:
--
作者:
Liu Z;Qin ZY;Zhu L;Athavale SV;Sengupta A;Jia ZJ;Garcia-Borràs M;Houk KN;Arnold FH

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Propargyl amines are versatile synthetic intermediates with numerous applications in the pharmaceutical industry. An attractive strategy for efficient preparation of these compounds is nitrene propargylic C(sp3)–H insertion. However, achieving this reaction with good chemo-, regio-, and enantioselective control has proven to be challenging. Here, we report an enzymatic platform for the enantioselective propargylic amination of alkynes using a hydroxylamine derivative as the nitrene precursor. Cytochrome P450 variant PA-G8 catalyzing this transformation was identified after eight rounds of directed evolution. A variety of 1-aryl-2-alkyl alkynes are accepted by PA-G8, including those bearing heteroaromatic rings. This biocatalytic process is efficient and selective (up to 2610 total turnover number (TTN) and 96% ee) and can be performed on preparative scale.
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