Controlled Release of Nitric Oxide And Drugs From Functionalized Macromers And Oligomers
申请人:Bezwada Rao S.
公开号:US20120035259A1
公开(公告)日:2012-02-09
The present invention provides NO and, optionally, drug releasing macromers and oligomers wherein the drug molecule and NO releasing moiety are linked an absorbable macromer or oligomeric chain susceptible to hydrolytic degradation and wherein the macromer or oligomer comprises of repeat units derived from safe and biocompatible molecules such as glycolic acid, lactic acid, caprolactone and p-dioxanone. Furthermore, the present invention relates to controlled release of nitric oxide (NO) and/or drug molecule from a NO and drug releasing macromer or oligomer. Moreover, the present invention also relates to medical devices, medical device coatings and therapeutic formulations comprising of nitric oxide and drug releasing macromers and oligomers of the present invention.
Synthesis of Cyclic Hydroxamic Acids through −NOH Insertion of Ketones
作者:Ranjan Banerjee、S. Bruce King
DOI:10.1021/ol9018198
日期:2009.10.15
Treatment of cyclobutanone or cyclopentanone with N-hydroxybenzenesulfonamide under basic conditions yields the ring-expanded cyclic hydroxamic acid in 18−69% yield. Reactions of substituted cyclobutanones give ring expanded products where the −NOH group regio- and stereoselectively inserts to the more substituted position. This expansion likely proceeds through a mechanism that includes addition of
Synthesis and Structural Study of Tetravalent (Zr
<sup>4+</sup>
, Hf
<sup>4+</sup>
, Ce
<sup>4+</sup>
, Th
<sup>4+</sup>
, U
<sup>4+</sup>
) Metal Complexes with Cyclic Hydroxamic Acids
iron(III). We report herein the first structural study of the complexes of 1– and of 6–, an unsaturated seven-membered ring analog of 2–, with tetravalent cations of transition metals (zirconium and hafnium), lanthanide (cerium), and actinides (thorium and uranium). Structuralcharacterization by means of X-ray crystallography of the corresponding ML4 complexes evidenced distorted square antiprismatic
The structures of the six-coordinate Fe(III) and Ga(III) complexes of the cyclic 6- and 7-membered hydroxamicacids PIPOH and AZEPOH found in several mixed-ligand siderophores are intermediate between the octahedron (OC) and the trigonal prism (TPR). The coordination geometries of [M(AZEPO)]3 are very close to OC, whereas the coordination geometry of the [Fe(PIPO)3] complex is half-way between OC and