Platinum-Catalyzed Alkene Cyclohydroamination: Evaluating the Utility of Bidentate P,N/P,P Ligation and Phosphine-Free Catalyst Systems
作者:Christopher B. Lavery、Michael J. Ferguson、Mark Stradiotto
DOI:10.1021/om1006984
日期:2010.11.22
including PtCl2 and (COD)PtCl2 in promoting the cyclohydroamination of primary as well as secondary alkyl/arylamines tethered to α-olefins is demonstrated for the first time. Further catalytic studies examining the use of phenylene-P,N co-ligands, as well as neutral, cationic, and formally zwitterionic complexes derived from the new ligand precursor 1-PPh2-2-P(tBu)2-indene, revealed comparable reactivity
首次证明了包括PtCl 2和(COD)PtCl 2在内的不含膦的Pt预催化剂在促进拴系在α-烯烃上的伯以及仲烷基/芳基胺的环氢化胺化方面的功效。进一步的催化研究检查了亚苯基-P,N共配体以及衍生自新的配体前体1-PPh 2 -2-P(tBu)2-茚的中性,阳离子和形式两性离子络合物的使用,发现具有可比性相对于这些不含膦的催化剂,在Pt催化的环氢化胺催化中具有较高的反应活性。