Use Of The PIGD Protein For Catalyzing 1,4-Additions Of 2-Oxoalkanoates To Alpha, Beta-Unsaturated Ketones
申请人:Müller Michael
公开号:US20100305337A1
公开(公告)日:2010-12-02
The present invention relates to the preparation of compounds of the general formula II
which can be obtained by 1,4 addition of 2-oxoalkanoates or 2-oxocarboxylic acids onto the appropriate ketones. The present invention also relates to the use of the PigD protein for catalysis of 1,4 additions of 2-oxoalkanoates/-carboxylic acids, for example pyruvate/pyruvic acid or 2-oxobutyrate/2-oxobutyric acid, onto aliphatic, aromatic and heterocyclic α,β-unsaturated ketones. The 1,4 additions are effected here with CO
2
elimination. The use of the PigD protein as a catalyst in the aforementioned 1,4 additions enables the synthesis of addition products with stereoactive centers these addition products being preparable with an enantiomeric excess of more than 80% ee. The aliphatic, aromatic and heterocyclic α,β-unsaturated ketones which are suitable for the process are represented by the general formula I:
本发明涉及制备一般式II化合物的方法,该方法可以通过将2-氧代烷酸酯或2-氧代羧酸加成到适当的酮上来获得。本发明还涉及利用PigD蛋白催化2-氧代烷酸酯/羧酸的1,4加成,例如对丙酮酸/丙酮酸或2-氧丁酸/2-氧丁酸加成到脂肪族、芳香族和杂环α,β-不饱和酮上。这里的1,4加成是伴随着CO2消除进行的。在上述1,4加成中使用PigD蛋白作为催化剂,可以合成带有立体活性中心的加成产物,这些加成产物可以以超过80% ee的对映体过量制备。适用于该过程的脂肪族、芳香族和杂环α,β-不饱和酮由一般式I表示。