Diels–Alder reaction of tetraarylcyclopentadienones with benzo[<i>b</i>]thiophene <i>S</i>,<i>S</i>-dioxides: an unprecedented de-oxygenation <i>vs.</i> sulfur dioxide extrusion
作者:Palani Manikandan、Jayachandran Karunakaran、Elumalai Varathan、Georg Schreckenbach、Arasambattu K Mohanakrishnan
DOI:10.1039/d0cc05842d
日期:——
benzo[b]thiophene dioxides in xylenes at reflux led to the formation of tetra aryl-substituted dibenzothiophene as well as penta aryl-substituted benzene analogues depending on the influence of aryl substituents present on cyclopentadienones. The intermediate dihydrodibenzothiophene-dioxides underwent aromatization either through de-oxygenation or extrusion of sulfur dioxide to furnish substituted dibenzothiophenes
四芳基环戊二烯酮与二甲苯中的苯并[ b ]噻吩二氧化物在回流下的Diels-Alder反应导致四芳基取代的二苯并噻吩以及五芳基取代的苯类似物的形成,具体取决于芳基取代基对环戊二烯的影响。中间体二氢二苯并噻吩二氧化物通过脱氧或挤出二氧化硫进行芳构化,以提供取代的二苯并噻吩或苯。
Facile synthesis of tricyclic isoxazole-fused benzo[b]thiophene 1,1-dioxide derivatives via 1,3-dipolar cycloaddition
作者:Kai-Kai Wang、Yan-Li Li、Wei Zhang、Shan-Shan Zhang、Ting-Ting Qiu、Xueji Ma
DOI:10.1016/j.tetlet.2020.151943
日期:2020.6
A facile and efficient [3 + 2] 1,3-dipolar cycloaddition reaction of nitrileoxides generated in situ from hydroximoyl chlorides with benzo[b]thiophene 1,1-dioxides has been achieved for rapid access to tricyclic isoxazole-fused benzo[b]thiophene 1,1-dioxide derivatives in excellent yields (up to 98%) with high diastereoselectivities (dr > 19:1). The present process is characterized by mild reaction
快速,快速地获得三环异恶唑稠合的苯并[ b ]的便捷,有效的[3 + 2] 1,3-偶极环加成反应是由羟肟基氯与苯并[ b ]噻吩1,1-二氧化物生成的。]噻吩1,1-二氧化物衍生物,具有极高的非对映选择性(dr> 19:1),产率高(高达98%)。本方法的特征在于温和的反应条件和广泛的底物范围。还已经实现了环加合物向其他有用结构的转化。通过X射线单晶结构分析确认了典型化合物的化学结构。
Synthesis and cytotoxic activity of lipophilic sulphonamide derivatives of the benzo[ b ]thiophene 1,1-dioxide
In the search of new compounds with antineoplastic activity, we have analysed the effect of several structural modifications on the nucleus 6-benzo[b]thiophenesulphonamide 1,1-dioxide on its cytotoxic activity on tumour cells. Lipophilic substituents on the sulphonamide group significantly increased the cytotoxic activity measured using a panel of human tumour cell lines. Only slight variations on
CYANOQUINOLINE DERIVATIVES, THEIR PREPARATION, THEIR USE, AND MEDICAMENTS COMPRISING THEM
申请人:Prien Olaf
公开号:US20080108627A1
公开(公告)日:2008-05-08
The present invention relates to a quinoline derivative having the general formula (A):
in which R
1
, R
2
, X, Y and Z are indicated in the description and the claims, the use of the compounds of the general formula (A) for the treatment of various disorders, and the preparation of compounds of the general formula (A).