本工作涉及从3-(3,4-二卤苯基)-1-苯基-1 H-吡唑-4-甲醛开始的许多新化合物的设计和合成。通过采用Knoevenagel缩合反应来合成化合物,以满足抗惊厥和镇痛活性所需的结构先决条件。3-(3,4-二卤代苯基)-1-苯基-1 H-吡唑-4-甲醛与取代的噻唑烷,吡唑啉酮,噻唑并[3,2- a ]嘧啶,梅德鲁姆酸和巴比妥酸反应生成多种带有吡唑部分的杂环。通过元素分析和光谱分析对新合成的化合物进行了表征。另外,化合物1a的结构已经通过单晶X射线衍射技术阐明了这一点。使用最大电休克发作(MES)测试评估合成的分子的体内抗惊厥活性,同时通过甩尾法研究其镇痛活性。此外,使用旋转脚架毒性法研究所选化合物的毒性特征。在合成的化合物中,1a,4a和7a具有有效的抗惊厥活性,1b,5a,5b,7a和7b表现出最高的镇痛活性,没有任何毒性。还努力建立被测化合物之间的构效关系。
Visible Light-Promoted Three-Component Tandem Annulation for the Synthesis of 2-Iminothiazolidin-4-ones
摘要:
Described is a visible light-promoted three-component tandem annulation of amines, aryl/alkyl isothiocyanates, and alpha-bromoesters to form 2-iminothiazolidin-4-ones in the absence of metal and photocatalyst at room temperature. This [1 + 2 + 2] cyclization strategy involves visible light-promoted C-S/C-N bond formation and features a powerful approach to the synthesis of 2-iminothiazolidin-4-ones with broad substrate scope, excellent functional group tolerance, mild reaction conditions, step-economy, and simple operation, which also has potential applications in the pharmaceutical industry. UV vis spectroscopy indicates that an in situ-generated H-bonding electron donor acceptor (EDA) complex probably acts as the photocatalyst, facilitating the reaction process.
Synthesis of 2-iminothiazolidin-4-ones using guanine functionalized SBA-16 as a solid base catalyst
作者:Radha Gupta、Devendra Deo Pathak
DOI:10.1016/j.tetlet.2021.153497
日期:2021.11
a one-pot three-component tandem annulation approach is described for the synthesis of 2-iminothiazolidin-4-ones by the reaction of aromatic/aliphatic amines, aryl isothiocyanates, and ethyl bromoacetate, catalysed by guanine-functionalized SBA-16, [SBA-16@G], as an efficient and recyclableheterogeneoussolidbasecatalyst. The methodology is simple and offers a broad-substrate scope under mild reaction
Visible Light-Promoted Three-Component Tandem Annulation for the Synthesis of 2-Iminothiazolidin-4-ones
作者:Wei Guo、Mingming Zhao、Wen Tan、Lvyin Zheng、Kailiang Tao、Lingxiu Liu、Xinyu Wang、Deliang Chen、Xiaolin Fan
DOI:10.1021/acs.joc.7b02940
日期:2018.2.2
Described is a visible light-promoted three-component tandem annulation of amines, aryl/alkyl isothiocyanates, and alpha-bromoesters to form 2-iminothiazolidin-4-ones in the absence of metal and photocatalyst at room temperature. This [1 + 2 + 2] cyclization strategy involves visible light-promoted C-S/C-N bond formation and features a powerful approach to the synthesis of 2-iminothiazolidin-4-ones with broad substrate scope, excellent functional group tolerance, mild reaction conditions, step-economy, and simple operation, which also has potential applications in the pharmaceutical industry. UV vis spectroscopy indicates that an in situ-generated H-bonding electron donor acceptor (EDA) complex probably acts as the photocatalyst, facilitating the reaction process.
Design, synthesis, anticonvulsant and analgesic studies of new pyrazole analogues: a Knoevenagel reaction approach
with substituted thiazolidine, pyrazolone, thiazolo[3,2-a]pyrimidine, Meldrum's acid and barbituric acid yielded a variety of heterocycles bearing the pyrazole moiety. The newly synthesized compounds were characterized by elemental and spectroscopic analysis; in addition, the structure of compound 1a has been elucidated by single crystal X-ray diffraction technique. The synthesized molecules were evaluated
本工作涉及从3-(3,4-二卤苯基)-1-苯基-1 H-吡唑-4-甲醛开始的许多新化合物的设计和合成。通过采用Knoevenagel缩合反应来合成化合物,以满足抗惊厥和镇痛活性所需的结构先决条件。3-(3,4-二卤代苯基)-1-苯基-1 H-吡唑-4-甲醛与取代的噻唑烷,吡唑啉酮,噻唑并[3,2- a ]嘧啶,梅德鲁姆酸和巴比妥酸反应生成多种带有吡唑部分的杂环。通过元素分析和光谱分析对新合成的化合物进行了表征。另外,化合物1a的结构已经通过单晶X射线衍射技术阐明了这一点。使用最大电休克发作(MES)测试评估合成的分子的体内抗惊厥活性,同时通过甩尾法研究其镇痛活性。此外,使用旋转脚架毒性法研究所选化合物的毒性特征。在合成的化合物中,1a,4a和7a具有有效的抗惊厥活性,1b,5a,5b,7a和7b表现出最高的镇痛活性,没有任何毒性。还努力建立被测化合物之间的构效关系。