Selective exploitation of acetoacetate carbonyl groups using imidazolium based ionic liquids: synthesis of 3-oxo-amides and substituted benzimidazoles
作者:Ankita Chakraborty、Swapan Majumdar、Dilip K. Maiti
DOI:10.1016/j.tetlet.2016.06.048
日期:2016.7
An unprecedented Brønsted base ionic liquid tuned selective aminolysis of ester carbonyl of acetoacetates is demonstrated to achieve acetoacetamide derivatives. Other imidazolium ionic liquid performs an efficient cyclization catalysis involving acetoacetate-carbonyl groups and o-phenylenediamine at elevated temperature to produce benzimidazoles via C–C bond cleavage of intermediate 1,5-benzodiazepinones
Synthesis, spectroscopic characterization, X-ray structure, and in vivo neurotropic activity of new 1,5-benzodiazepin-2-ones
作者:Alexandr A. Gaponov、Elena T. Zlenko、Svetlana V. Shishkina、Oleg V. Shishkin、Oleksii M. Antypenko、Serhii V. Tretiakov、Vitaliy A. Palchikov
DOI:10.1007/s00044-016-1605-z
日期:2016.9
The paper reports the synthesis and in vivo pharmacological studies of a series of N-alkyl-1,5-benzodiazepine-2-ones. In this work, 19 novel benzodiazepine derivatives have been prepared and characterized by spectroscopic methods including 2D nuclear magnetic resonance techniques. Crystal structure of 1-benzyl-8-methyl-4-phenyl-1H-benzo[b][1,4]diazepin-2(3H)-one has also been determined by X-ray diffraction
该论文报道了一系列N-烷基-1,5-苯并二氮杂-2-酮的合成和体内药理研究。在这项工作中,已经制备了19种新颖的苯二氮卓衍生物,并通过包括2D核磁共振技术在内的光谱方法进行了表征。还通过X射线衍射测定了1-苄基-8-甲基-4-苯基-1 H-苯并[ b ] [1,4]二氮杂-2-2(3 H)-one 1的晶体结构。进行了用于物质预测和与人类血清白蛋白对接研究的活性谱的预测。这些研究中的两种化合物在体内显示出高的抗缺氧,镇静和抗惊厥活性。
An easy route to synthesize 1,5-arylodiazepin-2-ones
A series of 1,5-arylodiazepin-2-ones is prepared by the condensation of the appropriate o-beta-arylenediamines with beta-ketoesters in xylene under microwave irradiation. The reaction time is shortened to 10 mn, and the products are obtained in high yields. No by products are observed. Specific effects of microwaves are evidenced as no reaction occurs by classical heating in the same conditions.
An efficient preparation of 4-arylmethylisoxazol-5-ones by selective reduction of the 4-arylmethyleneisoxazol-5-ones