58061-48-6Relevant articles and documents
Rhodium catalysts with cofactor mimics for the biomimetic reduction of CN bonds
Chen, Fushan,Deng, Li,Dong, Wenjin,Tang, Jie,Xian, Mo
, p. 5564 - 5569 (2021/08/25)
A strategy based on the cooperation between metal and bonded cofactor mimics was applied to the transfer hydrogenation of CN bonds. We designed and synthesized a rhodium complex containing a 1,3-dimethylbenzoimidazole moiety, which could transfer hydride from a rhodium center to imine substrates in a biomimetic way. Under both transfer hydrogenation and reductive amination reaction conditions, the catalyst exhibited good selectivity towards CN bonds. With the catalyst, 34 imines were transfer hydrogenated to corresponding amines and a key intermediate of retigabine was prepared via reductive amination in a greener way. According to the NMR observations and isotope experiments, a plausible mechanism for this biomimetic reduction of CN bonds were proposed.
Dipicolylamine coupled rhodamine dyes: New clefts for highly selective naked eye sensing of Cu2+ and CN- ions
Ghosh, Kumaresh,Tarafdar, Debojyoti,Majumdar, Anupam,Daniliuc, Constantin G.,Samadder, Asmita,Khuda-Bukhsh, Anisur Rahman
, p. 47802 - 47812 (2016/06/06)
The dipicolylamine (DPA) motif which is known as a binder of Zn(ii) ions, has been utilized in devising rhodamine labelled compounds 1 and 2. Compound 1 acts as a FRET sensor and shows excellent selectivity for Cu(ii) ions over a series of other cations in CH3CN/H2O by exhibiting a colour change (colourless to pink) of the solution. The spectral and colour changes are recovered in the presence of CN- ions and thus, the ensemble 1·Cu2+ in CH3CN/H2O is established as the medium for selective detection of CN- ions. In contrast, the modified compound 2 with the dipicolylamine motif as the principal binding site has been established as the colorimetric sensor of Cu(ii) ions and the fluorometric sensor of Hg(ii), Zn(ii) and Cd(ii) ions. Both the compounds 1 and 2 are cell permeable and are successfully employed for the detection of intercellular metal ions through bright field and fluorescence imaging.
Aminophosphinic acids in a pyridine series: Cleavage of pyridine-2- and pyridine-4-methyl(amino)phosphinic acids in acidic solutions
Boduszek, Bogdan,Olszewski, Tomasz,Goldeman, Waldemar,Konieczna, Magdalena
, p. 787 - 795 (2007/10/03)
The synthesis of a series of new pyridine aminomethylphosphinic acids is described. These compounds were obtained in the reaction of the corresponding pyridine aldehydes with primary amines and with ethyl phenylphosphinate, or methylphosphinate, in the presence of bromotrimethylsilane. In aqueous, strong acid solutions, pyridine aminophosphinic acids were split, forming the phenyl-, or methylphosphonic, acid and the corresponding secondary pyridyl-alkylamines. The kinetics of some observed cleavages were measured, and a mechanism of the cleavage has been proposed. Copyright Taylor & Francis Group, LLC.
