Compounds that inhibit proteolytic enzymes of Human Immunodeficiency Virus (HIV) are described. Preparation of the inhibitors, pharmaceutical compositions containing them, and uses of the compounds or compositions for the treatment of HIV infections are also described.
Dynamic NMR as a Nondestructive Method for Determination of Rates of Dissociation. XV. Dissociation of Thioether and Ether Ligands in Tin(IV) and Boron Complexes and Significance of Entropy of Activation Therein
作者:Michinori Oki、Yasuhisa Yamada
DOI:10.1246/bcsj.61.1191
日期:1988.4
The rates of dissociation of thioether ligands which are imbedded in organotin(IV) compounds, such as trichloro[o-(ethylthiomethyl)phenyl]stannane, were determined by the dynamic NMR method. The dynamic processes of the corresponding ether ligands was too fast to detect as the change in line shapes in 1H NMR spectra. All the boron compounds examined, which possessed similar structures to the stannane and were of the boronate type, failed to show dissociation of a thioether or ether ligand due to their large rates of dissociation. The rates of dissociation of a thioether–tribromoboron complex were determined by the same technique. The feature of the activation parameters was that the compounds examined exhibited fairly large positive entropy of activation in accordance with other results that involve dissociation of ionic species into covalent species.
The present invention provides a pharmaceutical composition containing, as an active ingredient, a dihydropyridazine-3,5-dione derivative or a salt thereof or a solvate of these.
本发明提供了一种药物组合物,其活性成分含有二氢哒嗪-3,5-二酮衍生物或其盐或其溶液。
JUARISTI, EUSEBIO;CRUZ-SANCHEZ, J. SAMUEL, J. ORG. CHEM., 53,(1988) N 14, 3334-3338