Novel synthesis of unsymmetrically substituteds-tetrazines
摘要:
AbstractThe synthesis of unsymmetrical 3‐aryl and 3‐heterocyclic s‐tetrazines has been examined and the scope of the reaction and the product distribution is discussed. The products included unsymmetrical and symmetrical s‐tetrazines, hydrazines, diimides, tetrazoles and triazoles with the composition of the mixtures with respect to structural type varying with the individual reactions. Some transformations with the system are discussed.
The present invention relates to the use of selective P2X
7
receptor antagonists of formula I, or a pharmaceutically acceptable salt or prodrug thereof
wherein D, R
1
and R
2
are as defined in claim
1
, for the treatment of neuropathic pain, chronic inflammatory pain, inflammation, neurodegeneration and for promoting neuroregeneration,
The present invention relates to a class of EP2 antagonistazetidines of general formula (I), wherein the variables and substituents are as defined herein, and especially to EP2 antagonist compounds, to their use in medicine, particularly in the treatment of endometriosis and/or uterine fibroids (leiomyomata) and to intermediates usefulin their synthesis and to compositions containing them.
tetrazole (1,5-Tz) in several cases. The regioselectivities (1,5-Tz:2,5-Tz) are highly variable and cannot be exclusively attributed to the steric hindrance of the electrophile. A new rationale to explain the observed regioselectivity, based on the difference in mechanism between first- and second-order nucleophilic substitutions, is thus proposed. In addition, in some cases the intramolecular stabilization
二取代四唑的合成描述了从 1 H -5-单取代四唑通过脂族胺重氮化反应,形成瞬时烷基重氮中间体,充当烷基化剂。尽管 2,5-二取代四唑 (2,5-Tz) 以中等至极好的收率优先形成,但在几种情况下也可以分离出少量的 1,5-二取代四唑 (1,5-Tz)。区域选择性(1,5-Tz:2,5-Tz)是高度可变的,不能完全归因于亲电试剂的空间位阻。因此,基于一级和二级亲核取代之间的机制差异,提出了解释观察到的区域选择性的新原理。此外,在某些情况下,所得重氮的分子内稳定性会影响区域选择性。
[EN] THE USE OF SELECTIVE P2X7 RECEPTOR ANTAGONISTS<br/>[FR] UTILISATION D'ANTAGONISTES SELECTIFS DU RECEPTEUR P2X7
申请人:ABBOTT LAB
公开号:WO2006086229A1
公开(公告)日:2006-08-17
[EN] The present invention relates to the use of selective P2X7 receptor antagonists of formula (I), or a pharmaceutically acceptable salt or prodrug thereof wherein D, R1 and R2 are as defined in claim 1, for the treatment of neuropathic pain, chronic inflammatory pain, inflammation, neurodegeneration and for promoting neuroregeneration. [FR] La présente invention concerne l'utilisation d'antagonistes sélectifs du récepteur P2X7 de formule (I), ou d'un sel ou pro-médicament pharmaceutiquement acceptable de ceux-ci, où D, R1 et R2 dans la formule I sont tels que définis dans la revendication 1, pour le traitement des douleurs neuropathiques, des douleurs chroniques inflammatoires, des inflammations, de la neurodégénérescence et pour favoriser la régénération neuronale.