کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
69075 | 48529 | 2006 | 5 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Stable catalyst for intermolecular Pauson–Khand reaction Stable catalyst for intermolecular Pauson–Khand reaction](/preview/png/69075.png)
The catalytic activity of previously formed Co2(CO)6[P(Ph)3]2 (1) was compared with Co2(CO)8 and the system formed by Co2(CO)8 plus PPh3 in the intermolecular Pauson–Khand (PK) reaction between norbornadiene and phenylacetylene. The effects of pressure, catalyst concentration and temperature were also studied. Additionally, the catalytic activity of complex 1 was compared with Co2(CO)6[P(OPh)3]2 (2) in the intermolecular PK reaction between strained alkenes and terminal and non-terminal alkynes. Both catalysts are very stable, quite efficient and interestingly complex 2 leads to double PK reaction. The results indicate that these complexes are attractive alternatives to Co2(CO)8 as catalyst and in addition, complex 2 is an alternative catalyst for double cyclocarbonylation reaction.
Detailed accounts of intermolecular Pauson–Khand reaction catalyzed by two stable Co2(CO)6[P(Ph)3]2 (1) and Co2(CO)6[P(OPh)3]2 (2) complexes, have been described. The results indicate that these complexes are attractive alternatives to Co2(CO)8 as catalyst and in addition, complex 2 is an alternative catalyst for double cyclocarbonylation reaction. Figure optionsDownload as PowerPoint slide
Journal: Journal of Molecular Catalysis A: Chemical - Volume 246, Issues 1–2, 1 March 2006, Pages 237–241