Autor: |
Yoshihide Usami, Yuya Tatsui, Hiroki Yoneyama, Shinya Harusawa |
Jazyk: |
angličtina |
Rok vydání: |
2020 |
Předmět: |
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Zdroj: |
Molecules, Vol 25, Iss 20, p 4634 (2020) |
Druh dokumentu: |
article |
ISSN: |
1420-3049 |
DOI: |
10.3390/molecules25204634 |
Popis: |
Alkylamino coupling reactions at the C4 positions of 4-halo-1H-1-tritylpyrazoles were investigated using palladium or copper catalysts. The Pd(dba)2 catalyzed C-N coupling reaction of aryl- or alkylamines, lacking a β-hydrogen atom, proceeded smoothly using tBuDavePhos as a ligand. As a substrate, 4-Bromo-1-tritylpyrazole was more effective than 4-iodo or chloro-1-tritylpyrazoles. Meanwhile, the CuI mediated C-N coupling reactions of 4-iodo-1H-1-tritylpyrazole were effective for alkylamines possessing a β-hydrogen atom. |
Databáze: |
Directory of Open Access Journals |
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