Insights into Sonogashira Cross-Coupling by High-Throughput Kinetics and Descriptor Modeling
作者:Markus R. an der Heiden、Herbert Plenio、Stefan Immel、Enrico Burello、Gadi Rothenberg、Huub C. J. Hoefsloot
DOI:10.1002/chem.200701418
日期:2008.3.17
A method is presented for the high-throughput monitoring of reaction kinetics in homogeneous catalysis, running up to 25 coupling reactions in a single reaction vessel. This method is demonstrated and validated on the Sonogashira reaction, analyzing the kinetics for almost 500 coupling reactions. First, one-pot reactions of phenylacetylene with a set of 20 different meta- and para-substituted aryl
提出了一种用于高通量监测均相催化反应动力学的方法,在一个反应容器中最多可进行25个偶联反应。该方法已在Sonogashira反应中得到证实和验证,并分析了近500个偶联反应的动力学。首先,在存在17种不同的Pd-膦配合物的情况下,分析了苯乙炔与20种不同的间位和对位取代的芳基溴的一锅反应。此外,检查了21种不同ArX(X = Cl,Br,I)底物的温度依赖性Sonogashira反应,并通过Eyring图确定了相应的活化焓和熵:ArI(DeltaH(不等于)= 48 -62 kJ mol(-1); DeltaS(不等于)=-71--39 J mol(-1)K; NO(2)-> OMe),ArBr(DeltaH(不等于)= 54-82 kJ mol(-1),DeltaS(不等于)=-55-11 J mol(-1)K)和ArCl(DeltaH(不等于)= 95-144 kJ mol(-1),DeltaS(不等于)=-6-100