Universal remedy: The α‐hydroxylation of β‐keto esters and a range of other suitably substituted carbonyl compounds can be effected in the presence of IBX (2‐iodoxybenzoic acid). This novel reactivity underscores the importance of IBX as a universally applicable oxidizing agent.
Adenosine receptor ligands and their use in the treatment of disease
申请人:——
公开号:US20010027196A1
公开(公告)日:2001-10-04
The invention relates to cyclic heteroaromatic compounds, containing at least one nitrogen atom, and to their use in the manufacture of medicaments for the treatment of diseases, related to adenosine receptor modulators, such as Alzheimer's disease, Parkinson's disease, neuroprotection, schizophrenia, anxiety, pain, respiration deficits, depression, asthma, allergic responses, hypoxia, ischaemia, seizure, substance abuse, sedation and they may be active as muscle relaxants, antipsychotics, anti epileptics, anticonvulsants and cardiaprotective agents.
Sulfonium Salts Enable the Direct Sulfenylation of Activated C(
<i>sp</i>
<sup>
<i>3</i>
</sup>
)−H Bonds
作者:Liang Zhang、Sakkani Nagaraju、Banoth Paplal、Yunliang Lin、Shuhua Liu
DOI:10.1002/ejoc.202001569
日期:2021.3.5
The direct alkylsulfenylation of various activated C−H bonds has been reported. The reaction utilizes sulfonium salts as sulfenylation reagents which are readily prepared, operationally simple, and performe under mild reaction conditions.
Rhodium-Catalyzed Asymmetric Formal Olefination or Cycloaddition: 1,3-Dicarbonyl Compounds Reacting with 1,6-Diynes or 1,6-Enynes
作者:Takeshi Suda、Keiichi Noguchi、Ken Tanaka
DOI:10.1002/anie.201007727
日期:2011.5.2
A cationic rhodium(I) complex catalyzes the title reaction of 1,6‐diynes through a [2+2+2] cycloaddition and subsequent electrocyclic ring opening (see scheme; cod=1,5‐cyclooctadiene, H8‐binap=2,2′‐bis(diphenylphosphino)‐5,5′,6,6′,7,7′,8,8′‐octahydro‐1,1′‐binaphthyl). The asymmetric intramolecular [2+2+2] cycloaddition of 1,3‐dicarbonyl compounds with 1,6‐enynes was also accomplished.
作者:Tobias Harschneck、Sara Hummel、Stefan F. Kirsch、Philipp Klahn
DOI:10.1002/chem.201102680
日期:2012.1.23
An operationally simple, direct azidation of 1,3‐dicarbonyl compounds has been developed. The reaction proceeds readily under ambient conditions using sodium azide and an iodine‐based oxidant such as I2 or 2‐iodoxybenzoic acid (IBX)‐SO3K/NaI. In particular, the latter method, as a new and well‐balanced oxidizing agent, shows excellent functional group tolerance and substrate scope and thus allows access
已开发出一种操作简单的直接叠氮化1,3-二羰基化合物的方法。使用叠氮化钠和基于碘的氧化剂(例如I 2或2-碘氧基苯甲酸(IBX)-SO 3 K / NaI ),反应可在环境条件下轻松进行。尤其是,后一种方法作为一种新型且平衡良好的氧化剂,具有出色的官能团耐受性和底物范围,因此可以使用各种叔二叠氮基和2,2-双叠氮基1,3-二羰基化合物使用传统方法将更难以访问。由于含叠氮化物的产品容易与炔烃进行1,3-偶极环加成反应,因此我们的报告提出了一条通往敏感复杂分子类似物的新途径。