A simple and clean method for multicomponent synthesis of spiro [indole-tetrahydropyrano(2,3-d)pyrimidine] derivatives using SBA-Pr-SO3H as catalyst under solvent-free conditions
functionalized SBA-15 (SBA-Pr-SO3H) as a new nanoporous solid acid catalyst was applied in the green one-pot synthesis of spiro[indole-tetrahydropyrano(2,3-d)pyrimidine] derivatives via three-component reaction of isatins, malononitrile or cyanoacetic esters and barbituric acids under solvent-freeconditions. SBA-Pr-SO3H was proved to be an efficient heterogeneous nanoporous solid acid catalyst with a pore
Microwave Assisted One-pot Synthesis of 2-Amino-4<i>H</i>-chromenes and Spiropyrano[2,3-<i>d</i>]pyrimidine
作者:Alaa F. Mahmoud、Fathy F. Abd El-Latif、Amira M. Ahmed
DOI:10.1002/cjoc.201090041
日期:2010.1
A convenient and efficient method using microwaveassisted one pot synthesis reactions for synthesis of 4H‐benzo[f]chromenes by the reaction of aromatic aldehydes with a mixture of malononitrile and naphthols was examined. The synthesis of spiropyrano[2,3‐d]pyrimidines by the reaction of isatin with malononitrile and barbituric acid and/or thiobarbituric acid was investigated. The versatility of the
研究了一种方便有效的方法,该方法利用微波辅助的一锅合成反应通过芳族醛与丙二腈和萘酚的混合物反应合成4 H-苯并[ f ]色烯。研究了靛红与丙二腈,巴比妥酸和/或硫代巴比妥酸反应合成螺并吡喃并[2,3- d ]嘧啶。还通过芳族醛和丙二腈与各种试剂的反应检查了该方法的多功能性。
An efficient protocol for multicomponent synthesis of spirooxindoles employing L-proline as catalyst at room temperature
作者:Dushyant Singh Raghuvanshi、Krishna Nand Singh
DOI:10.1002/jhet.451
日期:2010.11
An efficient three‐component one‐pot synthesis of medicinally important spirooxindoles is described by the reaction of isatin, malononitrile/ethyl cyanoacetate, and dimedone/barbituric acid using L‐proline as catalyst in ethanol at roomtemperature. This approach is convenient, mild, and affords the products in high yields without the use of chromatography. J. Heterocyclic Chem., (2010).