An enantioselective synthesis of cyclopentenediones bearing a pyrazole unit has been achieved through an organocatalytic Michael addition/oxidation process. This desymmetrization reaction led to the desired pyrazole‐cyclopentenediones with high yield and good enantioselectivities. The postulated cross‐dehydrogenative coupling‐mechanism has been investigated via preliminary control experiments.

中文翻译：

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环戊二烯通过有机催化交叉脱氢偶联的不对称化

通过有机催化迈克尔加成/氧化过程已经实现了带有吡唑单元的环戊二烯的对映选择性合成。这种脱对称反应可得到所需的吡唑-环戊二烯，具有高收率和良好的对映选择性。通过初步的控制实验研究了假定的交叉脱氢偶联机理。