Synthesis of novel 1,3,5-cis,cis-triaminocyclohexane ligand based Cu(II) complexes as potential radiopharmaceuticals and correlation of structure and serum stability
摘要:
The present study describes the synthesis of Cu(II) and radioactive Cu-67.64(II) complexes with N,N',N"-tris(2-pyridylmethyl)-1,3,5-cis,cis-triaminocyclohexane (tachpyr) and a new pyridyl ring alkylated derivative, N,N',N"-tris(6-methyl-2-pyridylmethyl)1,3,5-cis,cis-triaminocyclohexane (tach-6-Me-pyr) and the investigation of their structural and solution properties as well as stability in human serum. Facile formation of both the `cold' and Cu-67.64-radiolabeled complexes, [Cu(tachpyr)](2+) and [Cu(tach-6-Me-pyr)](2+), occurs in aqueous (0.15 M NH4OAc buffer, pH 6.5) or methanolic solvent. X-ray crystallography reveals that Cu(II) is hexacoordinate in [Cu(tachpyr)](2+) while methylation at the 6-position of the pyridyl donors in tachpyr produces considerable steric hindrance. Thus one pyridyl arm of tach-6-Mepyr is rotated entirely away from copper in [Cu(tach-6-Mepyr)](2+), resulting in a highly distorted trigonal-bipyramidal coordination geometry. The solid-state structures of the complexes correlate well with their stabilities in human serum at 37 degreesC. Thus, [Cu-67(tachpyr)](2+) possesses excellent stability, being unchanged after a period of 7 days, while [Cu-67(tach-6-Mepyr)](2+) decomposes within 1 h. Tachpyr may be an excellent candidate for developing new Cu(II) radiopharmaceuticals for diagnosis and therapy. (C) 2001 Elsevier Science Ltd. All rights reserved.
Combined use of cruciferous indoles and chelators for the treatment of papilloma virus-related conditions
申请人:Zeligs A. Michael
公开号:US20050063903A1
公开(公告)日:2005-03-24
This abstract describes eliminating the need for cutting up manufactured synthetic filament polymer yarns (for examples, nylon and Kevlar) into wool and linen lengths and respinning these again into yarns approaching wool and linen like wear properties in clothing and other textiles at significant reductions in production costs accomplished by using laser pierced holes in the plates of and adding continuous wave or pulsed sonic generators to the rear of spinneret housings through which viscous polymer fluids flow both of which produce surface irregularities in the yarns (longitudinal and circumferential ridges in valleys) in the spun continuous filaments approaching wear properties of natural wool and linen.
METHODS AND SYSTEM FOR INTERFERING WITH VIABILITY OF BACTERIA AND RELATED COMPOUNDS AND COMPOSITIONS
申请人:NEWMAN Dianne K.
公开号:US20130022578A1
公开(公告)日:2013-01-24
Provided herein are methods and systems for interfering with viability of bacteria and related compounds and compositions.
本文提供了干扰细菌和相关化合物和组合物生存能力的方法和系统。
Methods and system for interfering with viability of bacteria and related compounds and compositions
申请人:CALIFORNIA INSTITUTE OF TECHNOLOGY
公开号:US10406211B2
公开(公告)日:2019-09-10
Provided herein are methods and systems for interfering with viability of bacteria and related compounds and compositions.
本文提供了干扰细菌活力的方法和系统以及相关化合物和组合物。
Phenazine degrading agents and related compositions, methods and systems for interfering with viability of bacteria
申请人:CALIFORNIA INSTITUTE OF TECHNOLOGY
公开号:US10913936B2
公开(公告)日:2021-02-09
Provided herein are phenazine degrading agents, methods and systems for interfering with viability of bacteria and related antimicrobial and compositions.