41018-66-0Relevant academic research and scientific papers
Palladium-catalyzed monoarylation of arylhydrazines with aryl tosylates
Huang, Yange,Choy, Pui Ying,Wang, Junya,Tse, Man-Kin,Raymond Wai-Yin Sun,Albert Sun-Chi Chan,Kwong, Fuk Yee
, p. 14664 - 14673 (2020/12/29)
A palladium-catalyzed C-N bond coupling reaction between arylhydrazines and aryl tosylates for facile synthesis of unsymmetrical N,N-diarylhydrazines has been developed. Employing the catalyst system of Pd(TFA)2 associated with newly developed phosphine ligand L1, the monoarylation of arylhydrazine proceeds smoothly to afford desired products in good-to-excellent yields (up to 95%) with good functional group compatibility. This method provides an alternative synthetic pathway for accessing structurally diversified N,N-diarylhydrazines from simple and easily accessible coupling components.
An easy route to N,N-diarylhydrazines by Cu-catalyzed arylation of pyridine-2-carbaldehyde hydrazones with aryl halides
Wu, Wei,Li, Xin-Le,Fan, Xin-Heng,Yang, Lian-Ming
, p. 862 - 867 (2013/03/28)
A copper-catalyzed C-N coupling reaction is described for the preparation of pyridine-2-carbaldehyde N,N-diarylhydrazones by the arylation of N-mono- or -non-substituted hydrazones with aryl bromides/iodides, and the subsequent conversion of the hydrazones into N,N-diarylhydrazines by a transimination process with an aqueous solution of H2NNH2. The reaction features the use of CuI as the catalyst without the need for external ligands. This methodology provides a convenient alternative to the synthesis of structurally diverse N,N-diarylhydrazines from simple, easily accessible precursors. Copyright
