Efficient and versatile catalysis of N-alkylation of heterocyclic amines with alcohols and one-pot synthesis of 2-aryl substituted benzazoles with newly designed ruthenium(<scp>ii</scp>) complexes of PNS thiosemicarbazones
作者:Rangasamy Ramachandran、Govindan Prakash、Sellappan Selvamurugan、Periasamy Viswanathamurthi、Jan Grzegorz Malecki、Venkatachalam Ramkumar
DOI:10.1039/c4dt00006d
日期:——
or As, L = 2-(2-(diphenylphosphino)benzylidene) thiosemicarbazone (PNS-H), 2-(2-(diphenylphosphino)benzylidene)-N-methylthiosemicarbazone (PNS-Me), 2-(2-(diphenylphosphino)benzylidene)-N-phenylthiosemicarbazone (PNS-Ph)) have been synthesized and characterized by elemental analysis and spectroscopy (IR, UV-Vis, 1H, 13C, 31P-NMR) as well as ESI mass spectrometry. The molecular structures of complexes
Ruthenium(<scp>ii</scp>) complexes containing a phosphine-functionalized thiosemicarbazone ligand: synthesis, structures and catalytic C–N bond formation reactions via N-alkylation
作者:Rangasamy Ramachandran、Govindan Prakash、Sellappan Selvamurugan、Periasamy Viswanathamurthi、Jan Grzegorz Malecki、Wolfgang Linert、Alexey Gusev
DOI:10.1039/c4ra14797a
日期:——
We report the coordination flexibility of phosphino-thiosemicarbazone in ruthenium(ii) complexes, together with their catalytic properties with regards to N-alkylation.
我们报告了磷硫腙类配体在钌(II)配合物中的配位灵活性,以及它们在N-烷基化反应中的催化性能。
Efficient and chemoselective direct reductive amination of aromatic aldehydes catalyzed by oxo–rhenium complexes containing heterocyclic ligands
作者:Joana R. Bernardo、Sara C.A. Sousa、Pedro R. Florindo、Mariusz Wolff、Barbara Machura、Ana C. Fernandes
DOI:10.1016/j.tet.2013.08.016
日期:2013.10
This work describes the catalytic activity of 17 oxo–rhenium complexescontainingheterocyclicligands in the direct reductive amination of 4-nitrobenzaldehyde with 4-chloroaniline, using phenylsilane as reducing agent. In general, all of the catalysts tested gave excellent yields of the secondary amine, although, the best result was obtained with the catalytic system PhSiH3/ReOBr2(Hhmpbta)(PPh3) (2
Organometallic derivatives. Part III. The displacement of hydroxy- and similar groups from α-substituted ferrocenylmethanes by aniline
作者:G. Marr、B. W. Rockett、A. Rushworth
DOI:10.1039/j39710004000
日期:——
Hydroxy-, dimethylamino-, phenoxy-, and piperidino-groups have been displaced by anilinefrom the corresponding α-substitutedferrocenylmethanes. The anilino-group has been displaced from anilinomethylferrocene by p-methoxyaniline. The nucleophilic character of the attacking group has been shown to be important in this displacement.
Ferrocenylamines 2. Reductive methylation of secondary ferrocenylamines and ferrocenylaldimines: Synthesis, characterization of [(N-methyl-N-aryl)amino]methylferrocenes, 1-[(N-methyl-N-phenyl)amino]ethylferrocene and crystal structures of [(η5-C5H5)Fe(η5-C5H4CH2NHC6H4-Cl-4)] and [(η5-C5H5)Fe(η5-C5H4CH2N(CH3)-C6H4-OCH3-4)]
The reactions of ferrocenylaldimines (II) [(η5-C5H5)Fe(η5-C5H4CHNC6H4-R)] (R = 4-CH3O (a), 4-CH3 (b), H (c), 4-Cl (d), 3-Cl (e), 4-NO2 (f), 3-NO2 (g)) and ferrocenylketimine (I) [(η5-C5H5)Fe (η5-C5H4CH3CNC6H5)] with sodium borohydride in ethanol or lithiumaluminumhydride in THF resulted in secondary ferrocenylamines 3, 4. Reductive methylation of 3 (or II) and 4 with aqueous formaldehyde and sodium