高度功能化的[1,2,3]三唑并[1,5- a ]吡嗪-4(5 H )-酮(反应时间:12小时)或6,7-二氢-[1的时间依赖性、发散合成据报道,通过级联叠氮化物-炔环加成/氢胺化方案,形成了 ,2,3]三唑并[1,5- a ]吡嗪-4(5 H )-one(反应时间:2 h)支架。该转化具有官能团相容性好、底物范围广、原子经济性高、无需使用过渡金属催化剂等特点。
In the presence of a catalytic amount of Cp*RuCl(cod), 1,6-diynes were allowed to react chemo- and regioselectively with electron-deficient nitriles and heterocumulenes at 60−90 °C to afford heterocyclic compounds. The mechanism of the ruthenium-catalyzed regioselective formations of bicyclic pyridines and pyridones were analyzed on the basis of density functional calculations. Cyclocotrimerizations
在催化量的 Cp*RuCl(cod) 存在下,1,6-二炔可以在 60-90 °C 下与缺电子腈和杂枯烯进行化学和区域选择性反应,得到杂环化合物。在密度泛函计算的基础上分析了钌催化的双环吡啶和吡啶酮区域选择性形成的机制。丙炔酸乙酯与氰基甲酸乙酯或异氰酸丙酯的环三聚反应产生四种可能的吡啶或吡啶酮区域异构体中的两种。
Synthesis of benzo-fused lactams and lactones via Ru(<scp>ii</scp>)-catalyzed cycloaddition of amide- and ester-tethered α,ω-diynes with terminal alkynes: electronic directing effect of internal conjugated carbonyl group
In the presence of a catalytic amount of Cp*RuCl(cod), 1,6- and 1,7-diynes connected by an amide or an ester tether underwent cycloaddition with terminal alkynes at room temperature to give rise to cycloadducts in 40â93% yields with 63 : 37â83 : 17 regioisomer ratios.