Triflamides for protection and cyclization of tetraamines to tetraazamacrocycles
摘要:
A facile two-step synthesis of tetraazamacrocycles is reported starting from trifluoromethanesulfonyl derivatives of linear tetraamines. After cyclization, the macrocycle was deprotected using sodium in liquid ammonia.
Methods of preparing manganese complexes of nitrogen-containing
申请人:Monsanto Company
公开号:US05610293A1
公开(公告)日:1997-03-11
The present invention is directed to low molecular weight mimics of superoxide dismutase (SOD) represented by the formula: ##STR1## wherein R, R', R.sub.1, R'.sub.1, R.sub.2, R'.sub.2, R.sub.3, R'.sub.3, R.sub.4, R'.sub.4, R.sub.5, R'.sub.5, R.sub.6, R'.sub.6, R.sub.7, R'.sub.7, R.sub.8, R'.sub.8, R.sub.9, and R'.sub.9 and X, Y, Z and n are as defined herein, useful as therapeutic agents for inflammatory disease states and disorders, ischemic/reperfusion injury, stroke, atherosclerosis, hypertension and all other conditions of oxidant-induced tissue damage or injury.
Manganese complexes of nitrogen-containing macrocyclic ligands effective
申请人:G. D. Searle & Co.
公开号:US05874421A1
公开(公告)日:1999-02-23
The present invention is directed to low molecular weight mimics of superoxide dismutase (SOD) represented by the formula: ##STR1## wherein R, R', R.sub.1, R'.sub.1, R.sub.2, R'.sub.2, R.sub.3, R'.sub.3, R.sub.4, R'.sub.4, R.sub.5, R'.sub.5, R.sub.6, R'.sub.6, R.sub.7, R'.sub.7, R.sub.8, R'.sub.8, R.sub.9, and R'.sub.9 and X, Y, Z and n are as defined herein, useful as therapeutic agents for inflammatory disease states and disorders, ischemic/reperfusion injury, stroke, atherosclerosis, hypertension and all other conditions of oxidant-induced tissue damage or injury.
Zinc complexes of four tetra-aza macrocycles: enthalpies of formation in acetonitrile solution
作者:Douglas P. Graddon、Mauro Micheloni、Piero Paoletti
DOI:10.1039/dt9810000336
日期:——
ionised when the four N atoms of the base are methylated. In the presence of an excess of ZnBr2 all the bases form [ZnBr(base)]-[ZnBr3]. Enthalpies of formation of the complexes are smaller for the 14-membered macrocycle (‘cyclam’) than for the 15- and 16-membered and are similar for methylated and unmethylated cyclam. The results support five-co-ordinated structures for the complex ions, in which the
Complexes of cyclic polyaza chelators with cations of alkaline earth metals for enhanced biological activity
申请人:Winchell S. Harry
公开号:US20050112066A1
公开(公告)日:2005-05-26
Cyclic polyaza chelators that possess high affinity and specificity for first transition series metal cations exhibit an unanticipated improvement in biological activity when administered as complexes with cations of the alkaline earth metals, Ca(II) and Mg(II), most notably Ca(II). By virtue of this improvement, these complexes are particularly effective in the treatment of pathological conditions, including ischemia and ischemia-reperfusion injury.
METHOD FOR MANUFACTURING NITROGEN-CONTAINING CARBON ALLOY, NITROGEN-CONTAINING CARBON ALLOY, AND FUEL CELL CATALYST
申请人:FUJIFILM Corporation
公开号:US20150376218A1
公开(公告)日:2015-12-31
Provided is a method for manufacturing a nitrogen-containing carbon alloy having a sufficiently high oxygen reduction reaction activity, a nitrogen-containing carbon alloy, and a fuel cell catalyst. The method for manufacturing a nitrogen-containing carbon alloy comprises sintering a precursor which contains a nitrogen-containing compound and an inorganic metal salt, the nitrogen-containing compound having at least one heteroaromatic ring and a conjugated heterocycle, and the conjugated heterocycle having 12 or larger number of ring-forming atoms.