Asymmetric Biocatalytic Synthesis of 1‐Aryltetrahydro‐β‐carbolines Enabled by “Substrate Walking”
作者:Elisabeth Eger、Joerg H. Schrittwieser、Dennis Wetzl、Hans Iding、Bernd Kuhn、Wolfgang Kroutil
DOI:10.1002/chem.202004449
日期:2020.12.9
Stereoselective catalysts for the Pictet–Spengler reaction of tryptamines and aldehydes may allow a simple and fast approach to chiral 1‐substituted tetrahydro‐β‐carbolines. Although biocatalysts have previously been employed for the Pictet–Spengler reaction, not a single one accepts benzaldehyde and its substituted derivatives. To address this challenge, a combination of substrate walking and transfer of beneficial
色胺和醛的 Pictet-Spengler 反应的立体选择性催化剂可能允许简单快速地制备手性 1-取代四氢-β-咔啉。尽管生物催化剂以前曾用于皮克泰-斯宾格勒反应,但没有一种生物催化剂接受苯甲醛及其取代衍生物。为了应对这一挑战,结合底物行走和不同野生型主链之间有益突变的转移,将来自萝芙木( Rs STR) 的胡豆苷合酶开发成适合色胺和苯甲醛不对称 Pictet-Spengler 缩合的酶衍生物。双变体Rs STR V176L/V208A 接受各种邻位、间位和对位取代的苯甲醛,并产生相应的手性 1-芳基-四氢-β-咔啉,对映体过量高达 99%。