کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
68298 | 48511 | 2008 | 5 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Cu-exchanged phosphotungestic acid: An efficient and reusable heteropoly acid for the cyclopropanation of alkenes via C-H insertion Cu-exchanged phosphotungestic acid: An efficient and reusable heteropoly acid for the cyclopropanation of alkenes via C-H insertion](/preview/png/68298.png)
Alkenes undergo smooth cyclopropanation with ethyl diazoacetate using a catalytic amount of Cu-exchanged phosphotungestic acid (Cu-TPA) in dichloromethane under mild reaction conditions to afford cyclopropanecarboxylates in high yields with moderate selectivity. The catalyst is recycled and reused for three to four subsequent runs with a minimal decrease of activity.
Alkenes undergo smooth cyclopropanation with ethyl diazoacetate (EDA) using a catalytic amount of Cu-exchanged phosphotungestic acid (Cu-TPA) in dichloromethane under mild reaction conditions to afford cyclopropanecarboxylates in high yields with moderate selectivity. The catalyst is covered quantitatively and recycled for three to five subsequent runs with a minimal decrease of activity.Figure optionsDownload as PowerPoint slide
Journal: Journal of Molecular Catalysis A: Chemical - Volume 285, Issues 1–2, 18 April 2008, Pages 36–40