Convergent
<i>in situ</i>
Generation of Both Transketolase Substrates
<i>via</i>
Transaminase and Aldolase Reactions for Sequential One‐Pot, Three‐Step Cascade Synthesis of Ketoses
作者:Marion Lorillière、Christine Guérard‐Hélaine、Thierry Gefflaut、Wolf‐Dieter Fessner、Pere Clapés、Franck Charmantray、Laurence Hecquet
DOI:10.1002/cctc.201901756
日期:2020.2.6
We describe an efficient three‐enzyme, sequential one‐pot cascade reaction where both transketolase substrates are generated in situ in a convergent fashion. The nucleophilic donor substrate hydroxypyruvate was obtained from l‐serine and pyruvate by a transaminase‐catalyzed reaction. In parallel, three different (2S)‐α‐hydroxylated aldehydes, l‐glyceraldehyde, d‐threose, and l‐erythrose, were generated
我们描述了一种高效的三酶顺序单锅级联反应,其中两种转酮酶底物均以会聚方式原位产生。亲核供体底物羟基丙酮酸是通过转氨酶催化反应从l丝氨酸和丙酮酸获得的。平行地,通过简单的非手性化合物乙二醇醛和甲醛通过d生成了三种不同的(2 S)-α-羟基化醛基,l-甘油醛,d-苏糖和l-赤藓糖作为亲电子受体。果糖6-磷酸醛缩酶催化。从温度,酶比例和底物浓度方面研究了这三种酶的相容性。该方法的效率依赖于转酮醇酶反应的不可逆性,驱动可逆的氨基转移反应的转移并确保所有底物的完全转化。三个有价值(3小号,4小号)-ketoses,升-ribulose,ð -tagatose,和升以良好的收率与高非对映选择性得到-psicose。