Synthesis of Pyrazolo‐[4́,3́:5,6]pyrido[2,3‐d]pyrimidine‐diones Catalyzed by a Nano‐sized Surface‐Grafted<i>Neodymium</i>Complex of the Tungstosilicate<i>via</i>Multicomponent Reaction
作者:Mansoureh Daraie、Majid M. Heravi、Masoud Mirzaei、Nahid Lotfian
DOI:10.1002/aoc.5058
日期:——
inorganic–organic hybrid based on lanthanide clusters and Keggin type polyoxometalates (POMs) (Na[Nd (pydc‐OH)(H2O)4]3}[SiW12O40]) was used the first time as trinuclear catalyst for one pot synthesis of pyrazolo[4́́,3́:5,6]pyrido[2,3‐d]pyrimidine‐diones, via two different four and five‐component reactions involving hydrazine hydrate, ethyl acetoacetate, aryl aldehydes, and 6‐amino‐1,3‐dimethyl uracil or barbituric
基于镧系元素簇和Keggin型多金属氧酸盐(POMs)(Na [Nd(pydc-OH)(H 2 O)4 ] 3 } [SiW 12 O 40 ])的无机-有机杂化体首次用作三核催化剂一锅合成吡唑并[4,3:5,6]吡啶并[2,3- d ]嘧啶二酮,经由在绿色条件下,水合肼,乙酰乙酸乙酯,芳基醛和6-氨基-1,3-二甲基尿嘧啶或巴比妥酸的两个不同的四组分和五组分反应与乙酸铵为替代材料。为了评估原样杂化体在吸附和分离过程中的潜在应用,通过模拟研究在77 K下进行了氮吸附。在室温下通过粉末X射线衍射(PXRD)对杂化催化剂进行了进一步表征,表明该催化剂具有良好的相纯度。结果表明,由于Keggin阴离子与pydc-OH配体之间的特殊相互作用,杂化催化剂的催化活性相对于每个母体组分都有所增加。
Catalytic regioselective synthesis of pyrazole based pyrido[2,3-d]pyrimidine-diones and their biological evaluation
作者:Shailesh P. Satasia、Piyush N. Kalaria、Dipak K. Raval
DOI:10.1039/c3ob42132e
日期:——
A new type of biopolymer-based heterogeneous catalyst, cellulose supported acidic ionic liquid (Cell-IL), which was developed earlier in our lab, has been found to be very effective for the regioselective synthesis of pyrazole based pyrido[2,3-d]pyrimidine-diones. Its regioselectivity was confirmed by 1H NMR spectroscopy. All the newly synthesized compounds were characterized by LC-MS, 1H NMR, 13C NMR, IR spectroscopy and elemental analysis. The newly synthesized compounds were evaluated for their in vitro antimalarial activity against Plasmodium falciparum, in vitro antitubercular activity against Mycobacterium tuberculosis H37Rv strain and also for their antibacterial activity against a panel of pathogenic strains of bacteria and fungi. Some of them exhibited excellent activity when compared with first line drugs.
ZIF-8-incorporated nanoparticles of MgFe2O4 supported on graphene oxide: A ternary hybrid catalyst for the efficient synthesis of pyrazole-based pyrido[2,3-d]pyrimidine-diones
作者:Mohammad Ali Ghasemzadeh、Boshra Mirhosseini-Eshkevari、Saleheh Sanaei-Rad