通过五氯吡啶与稠合的嘧啶-2(5 H)-硫酮的反应,描述了一种有效的一锅法合成新的生物活性噻唑并[3,2- a ]嘧啶和噻唑并[2,3- b ]喹唑啉衍生物。喹唑啉-2(1 H)-硫酮。这些反应是在乙腈作为溶剂的碳酸钾作为碱存在下进行的,从而以良好至优异的产率生产出3a - n产物。五氯吡啶是形成环环状噻唑并[3,2- a ]嘧啶和噻唑并[2,3- b ]喹唑啉产物的双重亲电基石。
Application of O-sulfonic acid poly(4-vinylpyrrolidonium) chloride as an efficient polymer-supported catalyst in the rapid synthesis of 2H-indazolo[2,1-b]phthalazine-triones and Biginelli-like products
used as a catalyst for the synthesis of a series of 2H-indazolo[2,1-b]phthalazine-triones and Biginelli-like products. It was observed that only 10 mg of the catalyst was enough to catalyze these reactions undermildconditions, and the corresponding products were obtained in high to excellent yields. Moreover, the catalyst could be repeatedly used for at least five times without a noticeable decrease
A series of pyrimidinone derivatives were efficiently synthesized using PEG-SANM nanocomposite as the solid acid nanocatalyst undermild and solvent-free conditions. The generality of the process was successfully demonstrated by variation of the starting materials. Also, large-scale synthesis of products occurred readily in the presence of this nanocatalyst. This new method eliminated the use of organic
Nanomagnetic‐supported sulfonic acid is found to be a powerful and reusable heterogeneous catalyst for the efficient synthesis of pyrimidinones. In this study we use various ketones such as acetophenone and cyclopentanone instead of β‐keto ester in one‐pot synthesis of pyrimidinone at biginelli like reaction. Our objective is to improve conditions for the synthesis of multicomponent reactions using
Three-component one-pot synthesis of pyrimidinone derivatives in fluorous media: Ytterbium bis(perfluorooctanesulfonyl)imide complex catalyzed Biginelli-type reaction
作者:Mei Hong、Chun Cai
DOI:10.1002/jhet.241
日期:2009.11
The condensation of aromatic aldehyde, cyclopentanone, and urea or thiourea in the presence of Ytterbiumbis(perfluorooctanesulfonyl)imidecomplex in perfluorodecalin was used to synthesize a variety of benzylidene heterobicyclic pyrimidinones in excellent yields. J. Heterocyclic Chem., (2009).
An efficient and clean method was developed for the one-potsynthesis of pyrimidinones by ytterbium chloridecatalyzed Biginelli-type reaction of aromatic aldehyde, cyclopentanone, and urea or thiourea undersolvent-freeconditions.