Mn doped ZrO<sub>2</sub> as a green, efficient and reusable heterogeneous catalyst for the multicomponent synthesis of pyrano[2,3-d]-pyrimidine derivatives
作者:Surya Narayana Maddila、Suresh Maddila、Werner E. van Zyl、Sreekantha B. Jonnalagadda
DOI:10.1039/c5ra06373f
日期:——
A simple and an efficient method has been developed for the one-pot multicomponent synthesis of pyrano[2,3-d]-pyrimidine derivatives.
Nickel Nanoparticles as Semiheterogeneous Catalyst for One-Pot, Three-Component Synthesis of 2-Amino-4<i>H</i>-pyrans and Pyran Annulated Heterocyclic Moieties
作者:Jitender M. Khurana、Kanika Vij
DOI:10.1080/00397911.2012.700474
日期:2013.9.2
An efficient route for the synthesis of 2-amino-4H-pyrans and pyran annulated heterocyclic moieties has been reported via one-pot tandem Knoevenagel-cyclocondensation of aldehydes, malononitrile, and carbocyclic/heterocyclic 1,3-diones in the presence of stabilized nickel nanoparticles in ethylene glycol at room temperature. A wide range of aromatic aldehydes undergo the condensation readily to afford the pharmacologically important compounds in excellent yields. Bis-pyranization has been observed in the reactions of terephthaldehyde. Supplemental materials are available for this article. Go to the publisher's online edition of Synthetic Communications (R) to view the free supplemental file.