Synthesis of highly functionalized 1,6-dihydropyridines <i>via</i> the Zn(OTf)<sub>2</sub>-catalyzed three-component cascade reaction of aldimines and two alkynes (IA<sup>2</sup>-coupling)
作者:Syeda Aaliya Shehzadi、Christophe M. L. Vande Velde、Aamer Saeed、Kourosch Abbaspour Tehrani
DOI:10.1039/c8ob00195b
日期:——
three component synthesis of 1,6-dihydropyridines, involving aldimines, alkynes and electron-deficient dimethyl acetylenedicarboxylate (DMAD), in good to excellent yields has been described. Besides a range of different N-substituents, a variety of both aromatic and aliphatic alkynes could be used. The application of electron-deficient propiolates instead of DMAD resulted in regiospecific incorporation
Reactions of Ruthenium Benzylidene Complexes with Cyclic and Acyclic Imines: Oligomerization of 1-Pyrroline and Metathesis via Tautomerism
作者:Jubo Zhang、T. Brent Gunnoe
DOI:10.1021/om0301029
日期:2003.5.1
ring-opening oligomerization of the cyclicimine. The combination of ruthenium carbene complexes (Cl)2(PCy3)2RuCHPh and (Cl)2(PCy3)(H2IMes)RuCHPh (H2IMes = 1,3-dimesityl-4,5-dihydroimidazolylidene) with acyclic imines of the type (R)NCH(R‘) results in metathesis reactions when the imine possesses a C−H bond α to the imine carbon. Imines that lack C−H bonds α to the imine carbon do not react with (Cl)2(PCy3)2RuCHPh