C4-Alkylamination of C4-Halo-1H-1-tritylpyrazoles Using Pd(dba)2 or CuI
In: Molecules, Jg. 25 (2020-10-01), Heft 20
Online
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Zugriff:
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 &beta
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 &beta
hydrogen atom.
Titel: |
C4-Alkylamination of C4-Halo-1H-1-tritylpyrazoles Using Pd(dba)2 or CuI
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Autor/in / Beteiligte Person: | Yoneyama, Hiroki ; Usami, Yoshihide ; Harusawa, Shinya ; Tatsui, Yuya |
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Zeitschrift: | Molecules, Jg. 25 (2020-10-01), Heft 20 |
Veröffentlichung: | MDPI, 2020 |
Medientyp: | unknown |
ISSN: | 1420-3049 (print) |
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