27786-77-2Relevant academic research and scientific papers
The peculiar behavior of Picha in the formation of metallacrown complexes with Cu(ii), Ni(ii) and Zn(ii) in aqueous solution
Marchi, Luciano,Marchetti, Nicola,Atzeri, Corrado,Borghesani, Valentina,Remelli, Maurizio,Tegoni, Matteo
supporting information, p. 3237 - 3250 (2015/03/05)
The thermodynamic stability of the metallacrown complexes formed by picolinehydroxamic acid (Picha) with Cu(ii), Ni(ii) and Zn(ii) in aqueous solution has been determined by potentiometry, and the speciation models were validated by ESI-MS and UV-visible spectrophotometry. Cu(ii) and Zn(ii) form 12-MC-4 species as the unique metallacrowns present in the solution. While for Cu(ii) the 12-MC-4 is slightly less stable than that obtained with alaninehydroxamic acid (Alaha), the opposite was found for Zn(ii). Moreover, with Cu(ii) unprecedented 15-MC-5 and 18-MC-6 species were identified under ESI-MS conditions. Picha with Ni(ii) forms, in contrast, a 15-MC-5 complex as a unique metallacrown species. Structural studies of the framework of the 12-MC-4 complexes by ab initio methods were also carried out. The results of our investigations allowed us to rationalize not only the different behaviour of Picha in the formation of metallacrowns with the three metal ions, but also the reasons which underpin the strategies for stabilization of these species reported in the literature using ancillary ligands such as pyridine. This journal is
Synthesis of O-benzyl hydroxamates employing the sulfonate esters of N-hydroxybenzotriazole
Palakurthy, Nani Babu,Dev, Dharm,Paikaray, Sonali,Chaudhury, Susmitnarayan,Mandal, Bhubaneswar
, p. 7952 - 7958 (2014/02/14)
The direct conversion of various carboxylic acids, that include sterically hindered amino acids and di-peptides, to O-benzyl hydroxamates is demonstrated using sulfonate esters of benzotriazoles under ambient and milder conditions without significant race
N-[(diphenoxyphosphoryl)oxy]-2-phenyl-1H-benzimidazole as a versatile reagent for synthesis O-alkylhydroxamic acids
Kokare, Nagnnath D.,Shinde, Devanand B.
, p. 981 - 986 (2008/09/21)
(Chemical Equation Presented) Highly efficient reagent, N-[(diphenoxyphosphoryl)oxy]-2-phenyl-1H-benzimidazole was synthesized and its applicability was demonstrated for the synthesis of O-alkyl hydroxamic acids. The efficiency of the reagent was evaluate
Design, synthesis and utilization of a novel coupling reagent for the preparation of O-alkyl hydroxamic acids
Kokare, Nagnnath D.,Nagawade, Rahul R.,Rane, Vipul P.,Shinde, Devanand B.
, p. 4437 - 4440 (2008/02/03)
An efficient novel reagent, phosphoric acid diethyl ester 2-phenyl-benzimidazol-1-yl ester, was designed, and synthesized and its applicability was demonstrated for the preparation of O-alkyl hydroxamic acids. The O-alkyl hydroxamic acids of N-protected a
