作者:Sergei Žari、Tiiu Kailas、Marina Kudrjashova、Mario Öeren、Ivar Järving、Toomas Tamm、Margus Lopp、Tõnis Kanger
DOI:10.3762/bjoc.8.165
日期:——
The organocatalytic Michael addition of malonates to symmetric unsaturated 1,4-diketones catalyzed by thiourea and squaramide derivatives with Cinchona alkaloids afforded the formation of a new C-C bond in high yields (up to 98%) and enantiomeric purities (up to 93%). The absolute configuration of the product was suggested from comparison of the experimental and calculated VCD spectra of the reaction
由硫脲和方酸酰胺衍生物与金鸡纳生物碱催化的丙二酸酯与对称不饱和1,4-二酮的有机催化迈克尔加成以高产率(高达98%)和对映体纯度(高达93%)形成新的CC键。产物的绝对构型是从反应产物 3a 的实验和计算 VCD 光谱的比较中得出的。