Total Synthesis of Tetrahydrolipstatin, Its Derivatives, and Evaluation of Their Ability to Potentiate Multiple Antibiotic Classes against Mycobacterium Species
Neely, Frank L.; Bottomley, Lawrence A., Inorganic Chemistry, 1997, vol. 36, # 24, p. 5432 - 5434
作者:Neely, Frank L.、Bottomley, Lawrence A.
DOI:——
日期:——
Stereoelectronic Aspects of Inter-Metal Nitrogen Atom Transfer Reactions between Nitridomanganese(V) and Chromium(III) Porphyrins
作者:Lawrence A. Bottomley、Frank L. Neely
DOI:10.1021/ic960919c
日期:1997.11.1
Reactions of nitridomanganese(V) porphyrins with chromium(III) porphyrins resulted in the irreversible formation of nitridochromium(V) porphyrins and manganese(III) porphyrins. The progress of these reactions has been followed spectrophotometrically, electrochemically, and spectroscopically by EPR. Kinetic analysis of the spectrophotometric data obtained during these reactions for a variety of substituted porphyrins showed the reactions to be first order in each of the reactants. Rate constants were dependent upon the electronic and steric effects of the porphyrin substituent, upon the identity of the anion bound to the chromium(III) reactant, and upon the solvent dielectric constant. We propose that the mechanism of these nitrogen atom transfer reactions involves the nucleophilic attack of the nitridomanganese porphyrin donor on the cationic chromium(III) porphyrin acceptor facilitating a net, two-electron redox process mediated by a heterobimetallic mu-nitrido intermediate. This report represents the first systematic study of the stereoelectronic effects involved in the complete, inter-metal nitrogen atom transfer between two metalloporphyrins.
Bajju, Gauri D.; Ashu; Devi, Gita, Indian Journal of Heterocyclic Chemistry, 2018, vol. 28, # 2, p. 213 - 220
作者:Bajju, Gauri D.、Ashu、Devi, Gita、Ahmed, Altaf、Dar, Umar Ali、Katoch, Sapna