decomposition were measured by in situ infrared (IR) monitoring. Dirhodium complexes of Ikegami–Hashimoto type—and perchlorinated phthalimido derivatives in particular—performed better than classical achiral complexes. Clear correlations were found between speciation among dirhodium species and catalytic activity. With these results, novel cyclohexyl-derived catalysts were developed, affording good yields
                                    在[3 + 6 + 3 + 6]大环化反应的背景下,通过原位红外(IR)监测来测量α-重氮-β-
酮酸酯分解的精确动力学。池上桥本类型的Dirhodium配合物,尤其是全
氯代邻苯二甲
酰亚胺衍
生物,性能优于经典的非手性配合物。发现在ho物种之间的形态与催化活性之间存在明显的相关性。利用这些结果,开发了新颖的环己基衍生的催化剂,在低催化剂负载量(0.01 mol%至0.001 mol%)和大规模使用(1 g至20 g)的情况下,提供了良好的大环化合物收率(高达78%)。 )。