合成了一系列具有 1H-和 2H-四唑配体(2-异丙基-5-R-2H-四唑和 1H-四唑-1-基羧酸)的钯 (II) 配合物。通过 1H 和 13C NMR 光谱、高分辨率质谱和单晶 X 射线衍射分析证实了所得化合物的结构。根据分光光度法数据,复合物与 DNA 的结合较弱。在体外研究了所得钯配合物的细胞毒活性。
Alkylation of 5-Substituted 1<i>H</i>-Tetrazoles via the Diazotization of Aliphatic Amines
作者:Guillaume Reynard、Hélène Lebel
DOI:10.1021/acs.joc.1c01585
日期:2021.9.3
A new alkylation reaction of monosubstituted tetrazoles via the diazotization of aliphatic amines is reported. This method enables preferential formation of 2,5-disubstituted tetrazoles. A one-pot 1,3-dipolarcycloaddition/diazotization sequence starting from widely available nitriles is also described. Azide residues are quenched in the second step with the nitrite reagent, thus limiting the intrinsic
Coupling of
<i>N</i>
‐Tosylhydrazones with Tetrazoles: A Regioselective Synthesis of 2,5‐Disubstituted‐2
<i>H</i>
‐Tetrazoles
作者:Tímea Kaszás、Bence Szakács、Éva Juhász‐Tóth、Ivett Cservenyák、Tamara Kovács、László Juhász、László Somsák、Marietta Tóth
DOI:10.1002/ejoc.202201103
日期:2022.11.11
A new regioselectivesynthesis of 2,5-disubstituted-2H-tetrazoles is reported by C−N coupling of N-tosylhydrazones and tetrazoles in the presence of different bases under thermic activation conditions with excellent functional group tolerance.
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。
Aufhell- und/oder Färbemittel mit Tetrazolen
申请人:Henkel Kommanditgesellschaft auf Aktien
公开号:EP1859782A1
公开(公告)日:2007-11-28
Leistungsgesteigerte und irritationsverminderte Mittel zum Aufhellen und/oder Färben von Keratinfasern, insbesondere menschlichen Haaren, enthalten -bezogen auf ihr Gewicht - 0,001 bis 15 Gew.-% mindestens eines Tetrazols. Vorzugsweise sind darüber hinaus 0,001 bis 5 Gew.-% eines oder mehrerer Oxidationsfarbstoffvorprodukte und/oder direktziehender Farbstoffe enthalten.
The present invention provides compounds of Formula (I):
wherein A is as defined in the specification, and compositions comprising any of such novel compounds. These compounds are myeloperoxidase (MPO) inhibitors and/or eosinophil peroxidase (EPX) inhibitors, which may be used as medicaments.