Efficient and Selective Synthesis of<i>E</i>-Vinylamines<i>via</i>Tungsten(0)-Catalyzed Hydroamination of Terminal Alkynes
作者:Paulina Kocięcka、Izabela Czeluśniak、Teresa Szymańska-Buzar
DOI:10.1002/adsc.201400568
日期:2014.11.3
AbstractThe hydroamination of terminal alkynes (RCCH=phenylacetylene, 4‐methylphenylacetylene, 4‐fluorophenylacetylene, 1‐hexyne, methyl 2‐propynyl ether, prop‐2‐yn‐1‐ol) with secondary amines (piperidine, pyrrolidine, morpholine, piperazine, methylpiperazine, 4‐methylpiperidine and 3‐methylpiperidine) was achieved in high yield (up to 99%), regioselectivity (only anti‐Markovnikov product) and stereoselectivity (only E‐isomers) within a maximum of 5 h in reactions catalyzed by the tungsten tetracarbonyl complex cis‐[W(CO)4(piperidine)2] at 90 °C without any additional solvent.magnified image