Microwave accelerated facile and efficient synthesis of piperido[3′,4′:5,6]pyrano[2,3-d] pyrimidinones catalyzed by basic ionic liquid [BMIM]OH
作者:I.R. Siddiqui、Arjita Srivastava、Shayna Shamim、Anjali Srivastava、Malik A. Waseem、Shireen、Rahila、Afaf A.H. Abumhdi、Anushree Srivastava、Pragati Rai
DOI:10.1016/j.molcata.2013.10.026
日期:2014.2
could very efficiently catalyze the synthesis of piperido[3′,4′:5,6]pyrano[2,3-d]pyrimidinone derivatives from pyrano[3,2-c]piperidine analogues and carbonyl compounds. [BMIM]OH acted as a catalyst as well as the reaction medium and could be used for the reactions for five times without any appreciable loss of its catalytic efficiency. The synergic couple of microwave and ionic liquid provided high yields
Synthesis and molecular modeling studies of indole-based antitumor agents
作者:Riham F. George、Siva S. Panda、El-Sayed M. Shalaby、Aladdin M. Srour、I. S. Ahmed Farag、Adel S. Girgis
DOI:10.1039/c6ra07061b
日期:——
3-dipolar cycloaddition reaction of 1-alkyl-3,5-bis(arylidene)-4-piperidones 11–25 with azomethine ylides (generated by the condensation of isatins 26–28 with sarcosine 29). The single crystal X-ray studies of 46 and 48 supported the regio- and stereoselectivity of the reaction. Most of the synthesized spiro-indoles exhibited potent antitumor properties against the HeLa (cervical cancer) cell line through
Magneticgrapheneoxide functionalized with sulfonicacid (Fe3O4‐GO‐SO3H) was used as a new recyclable nanocatalyst for one‐pot synthesis of N‐aryl‐2‐amino‐1,6‐naphthyridine derivatives under solvent free conditions. The catalyst could be easily recovered from the reaction mixture by an external magnet and reused without significant decrease in activity even after 4 runs. This nanocatalyst exhibited
磺酸功能化的磁性氧化石墨烯(Fe 3 O 4 -GO-SO 3 H)被用作一种新的可回收纳米催化剂,用于在无溶剂条件下一锅法合成N-芳基-2-氨基-1,6-萘啶衍生物。可以容易地通过外部磁体从反应混合物中回收催化剂,并且即使在4次运行后,活性也不会显着降低地重复使用。该纳米催化剂显示出比其他市售磺酸催化剂更好的活性。
Quinine-catalyzed enantioselective tandem conjugate addition/intramolecular cyclization of malononitrile and 1,4-dien-3-ones
作者:Zhi-Peng Hu、Jian Li、Xiao-Gang Yin、Xue-Jing Zhang、Ming Yan
DOI:10.3998/ark.5550190.0014.301
日期:——
An organocatalytic tandemconjugateaddition / intramolecularcyclization of malononitrile and conformationally restricted 1,4-dien-3-ones has been developed. A series of cinchona alkaloids and their derivatives were examined as the catalysts. Quinine was found to be the most efficient catalyst in the absence of any additive. The reaction gave 2-amino-4H-pyrans with high yield and excellent enantiopurity
A facile atom – economical synthesis of highly substituted pyrazolo-<i>N</i>-methyl-piperidine grafted spiro-indenoquinoxaline pyrrolidine heterocycles via a sequential multicomponent reaction
Abstract An expedient one-pot sequential five component synthesis of highly substituted pyrazolo-N-methyl-piperidine grafted spiro-indenoquinoxaline pyrrolidine heterocycles involving [3 + 2]-cycloaddition of azomethine ylides as the key step is described. The protocol provides a mild reaction condition, high yield of the products, high regioselectivity and operational simplicity to assemble complex