Studies of the binary reactions of H3O+⋅(H2O)0,1,2 ions and their deuterated analogues with D2O, H2O, and NH3
摘要:
The rate coefficients and product ion distributions for the binary reactions of H3O+⋅(H2O)0,1,2 and D3O+⋅(D2O)0,1,2 ions with D2O and H2O, respectively, and with NH3 have been studied at 300 K using a selected ion flow tube (SIFT) apparatus. The ions were created in a flowing afterglow ion source and after mass filtering were injected at low energy into the SIFT. All the reactions proceeded at or near the gas kinetic limit. In the D2O and H2O thermoneutral isotopic exchange reactions, the distribution of H and D amongst the product ions and neutrals was seen to be purely statistical. This implies that these reactions proceed via the formation of an intermediate long-lived association ion in which total randomization of the H and D atoms takes place prior to unimolecular decomposition. No appreciable isotopic exchange occurred in the exothermic NH3 reactions which apparently proceeded via the simpler mechanisms of D+ (or H+) or D3O+ (or H3O+) transfer. The differing mechanisms for the H2O and D2O reactions compared to the NH3 reactions are rationalized in terms of the thermicities of the reactions and the lifetimes of the respective intermediate ions.
Two new 2-D frameworks based on tetra-copper(II)-substituted sandwich-type polyoxotungstate anions and [Cu<sub>2</sub>(dien)<sub>2</sub>(OH)]<sup>3+</sup> cations
作者:Pengtao Ma、Yongna Zhang、Jie Li
DOI:10.1080/00958972.2014.940336
日期:2014.7.3
polyoxometalates [Cu(dien)(H2O)]2[Cu2(dien)2(OH)]2[Cu4(B-α-XW9O33)2]}·4H2O (X = Sb, 1; X = As, 2) (dien = diethylenetriamine) were hydrothermally synthesized and characterized by elemental analysis, IR spectra, thermogravimetric (TG) analyses, and single-crystalX-ray diffraction. Both compounds are constructed from one four-coordinate [Cu(dien)(H2O)]2+, one [Cu2(dien)2(OH)]2[Cu4(B-α-XW9O33)2]} building unit
The present invention relates to a compound represented by the following formula, a pharmacologically acceptable salt thereof, or a use thereof as a pharmaceutical:
wherein R
1
and R
2
are substituents adjacent to each other, and together with two carbon atoms to each of which they attach, form a 5- to 7-membered non-aromatic carbocyclic group or the like, which may be substituted by 1 to 4 substituents selected from (1) an oxo group, (2) a hydroxyl group, and the like; R
3
represents a hydrogen atom or the like; and R
6
represents a hydrogen atom or the like.
It is an object of the present invention to discover an agent for treating or preventing lower urinary tract symptoms, and particularly symptoms regarding urinary storage, which has a superior strength of binding to a 5-HT1A receptor and an antagonism to the receptor.
Phenylacetamido-thiazole derivatives, process for the preparation and their use as antitumor agents
申请人:——
公开号:US20040235919A1
公开(公告)日:2004-11-25
Compounds represented by formula (I), as defined in the description, wherein R is a hydrogen atom or a methyl group and R1 is a group as defined in the specification, or a pharmaceutically acceptable salt thereof, are disclosed; the said compounds are useful in the treatment of cell proliferative disorders, e.g. cancer, associated with an altered cell cycle dependent kinase activity.
Pyrazolo-Quinazoline Derivatives, Process for Their Preparation and Their Use as Kinase Inhibitors
申请人:Traquandi Gabriella
公开号:US20090124605A1
公开(公告)日:2009-05-14
Pyrazolo-quinazoline derivatives of formula (Ia) or (Ib) as defined in the specification, and pharmaceutically acceptable salts thereof, process for their preparation and pharmaceutical compositions comprising them are disclosed; the compounds of the invention may be useful, in therapy, in the treatment of diseases associated with a disregulated protein kinase activity, like cancer.
The present invention relates to a compound represented by the following formula, a pharmacologically acceptable salt thereof, or a use thereof as a pharmaceutical:
wherein R
1
and R
2
are substituents adjacent to each other, and together with two carbon atoms to each of which they attach, form a 5- to 7-membered non-aromatic carbocyclic group or the like, which may be substituted by 1 to 4 substituents selected from (1) an oxo group, (2) a hydroxyl group, and the like; R
3
represents a hydrogen atom or the like; and R
6
represents a hydrogen atom or the like. This compound has a superior strength of binding to a 5-HT1A receptor and an antagonism to the receptor, and is useful as an agent for treating or preventing lower urinary tract symptoms, and particularly symptoms regarding urinary storage.