An efficient and simple synthetic approach has been developed for the preparation of biologically interesting spiro[oxindole-3,4'-(4′H-pyran)] derivatives via visible light-mediated one-pot, three-component reaction of isatins, 1,3-dicarbonylcompounds and malononitrile by using an inexpensive organic dye, Na2 eosin Y, as the photocatalyst in aqueous ethyl lactate at ambient temperature. The substrate
Synthesis of functionalized chromene and spirochromenes using l -proline-melamine as highly efficient and recyclable homogeneous catalyst at room temperature
commercially cheap l-proline and melamine for the synthesis of chromenes and spirochromenes (spirooxindoles) via multicomponent reactions at room temperature. Systematic studies were conducted in order to achieve desired reactivity and recyclability of the catalyst using various α-amino acids and aromatic amines as donor-acceptor pairs. Among the screened combinations, l-proline and melamine (3:1 ratio;
Efficient One-Pot Synthesis of Spirooxindole Derivatives Catalyzed by <scp>l</scp>-Proline in Aqueous Medium
作者:Yuling Li、Hui Chen、Chunling Shi、Daqing Shi、Shunjun Ji
DOI:10.1021/cc9001185
日期:2010.3.8
An efficient one-potsynthesis of spirooxindole derivatives by three-component reaction of isatins, malononitrile (cyanoacetic ester) and 1,3-dicarbonyl compounds in water in the presence of l-proline is reported. This new protocol has the advantages of environmental friendliness, higher yields, shorter reaction times, low cost, and convenient operation.
A bioglycerol derived carbon-sulfonic acid is found to catalyze efficiently the three-component one-pot condensation of isatin, malononitrile, and 1,3-dicarbonyls to afford a wide range of spiro[4H-pyran-3,3′-oxindole]derivatives in good yields and selectivity. The use of a recyclable solid acid catalyst makes this method simple, convenient, and cost-effective.
An Efficient and Easy Method for the One‐pot Synthesis of Spirooxindoles in the Presence of Na
<sub>2</sub>
CO
<sub>3</sub>
作者:Khadhar Navaz Umar Basha、Shanthi Gnanamani
DOI:10.1002/jhet.3580
日期:2019.7
An efficient and easy procedure for the one‐potsynthesis of spirooxindoles in the presence of Na2CO3 in water : methanol (1:1) is described. The salient features of this method are simple methodology, shorter reaction time, easy product isolation, and no chromatographic purification.
描述了一种在Na 2 CO 3在水:甲醇(1:1)中单罐合成螺硫辛酯的有效简便的方法。该方法的主要特点是方法简单,反应时间短,产物易于分离且无需色谱纯化。