Although enzymes have been found for many reactions, there are still transformations for which no enzyme is known. For instance, not a single defined enzyme has been described for the reduction of the C═N bond of an oxime, only whole organisms. Such an enzymatic reduction of an oxime may give access to (chiral) amines. By serendipity, we found that the oxime moiety adjacent to a ketone as well as an ester
尽管已为许多反应发现了酶,但仍存在尚不知道酶的转化。例如,还没有描述一种单一的酶来还原
肟的C═N键,只是整个
生物。
肟的这种酶促还原可以得到(手性)胺。通过偶然性,我们发现与酮以及酯基相邻的
肟部分可以被烯还原酶(ER)还原为中间
氨基。ER是众所周知的用于还原活化的烯烃的酶,例如α,β-不饱和酮。对于此处使用的特定底物,胺中间体自发地进一步与四取代的
吡嗪反应。这种还原反应代表了ER意外的混杂活性,从而扩展了使用酶的转化工具包。