N‐Protected β‐ and γ‐amino epoxides are useful chiral synthons. We report here that the enzyme cytochrome P450 3A4 can catalyze the formation of such compounds in a regio‐ and stereoselective manner, even in the presence of multiple double bonds or aromatic substituents. To this end, the theobromine chemical auxiliary is used not only to control the selectivity of the enzyme, but also as a masked amine, and to facilitate product recovery. Theobromine predictably directed epoxidation at the double bond of the fourth carbon from the theobromine group. Unlike with most catalysts, the selectivity did not depend on electronic or steric factors but rather on the position of the olefin relative to the theobromine group.

中文翻译：

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通过使用可可碱化学助剂的细胞色素P450 3A4进行区域选择性环氧化，可预测地产生N保护的β-或γ-氨基环氧化合物

N保护的β-和γ-氨基环氧化物是有用的手性合成子。我们在此报告，即使存在多个双键或芳族取代基，细胞色素P450 3A4酶也可以区域和立体选择性方式催化此类化合物的形成。为此，可可碱化学助剂不仅用于控制酶的选择性，而且还用作掩蔽的胺，并促进产物的回收。可可碱可预测地将可可碱基团中第四个碳的双键定向环氧化。与大多数催化剂不同，选择性不取决于电子或空间因素，而是取决于烯烃相对于可可碱的位置。