我们在此报道了烯基2-吡咯基酮的对映选择性分子间[2 + 2]光环化,利用手性磷酸介导的红移。这种合成方法可以得到 ee 高达 98% 的环丁烷。根据紫外-可见光谱,通过混合烯基2-吡咯基酮和手性磷酸观察到红色效应。在催化剂的 ee 和环加合物的 ee 之间观察到非线性相关性,表明两种底物在光环加成之前均与手性磷酸结合并形成二聚体复合物。
A chelation-assisted palladium-catalyzed C═Cbond cleavage of α, β-unsaturated ketone to form alkenyl nitrile in the presence of nitrile is disclosed on the basis of a formal group-exchange reaction formulated as C1═C2 + C3 → C1═C3 + C2, differing from normal alkene oxidative cleavage and metathesis type. The isolated key active Pd(II) complex as well as deuterium-labeled experiment revealed the necessity
α的螯合辅助钯催化的C = C键的断裂,β不饱和酮向腈的存在形式烯腈,公开了一种正式基交换反应的配制为C的基础上,1 = C 2 + C 3 →C 1 = C 3 + C 2,从正常烯烃氧化裂解和复分解型不同。分离出的关键活性 Pd(II) 配合物以及氘标记实验揭示了螯合基团的必要性,并提出了一条合理的催化途径。
Bukhari, Mujahid Hussain; Siddiqui, Hamid Latif; Ashraf, Chaudhary Muhammad, Journal of the Chemical Society of Pakistan, 2011, vol. 33, # 5, p. 720 - 725