One-pot three component condensation reaction in water: an efficient and improved procedure for the synthesis of furo[2,3-d]pyrimidine-2,4(1H,3H)-diones
The environment-friendly three component condensation reactions of N,N′-dimethylbarbituric acid, 4-nitrobenzaldehyde and alkyl or aryl isocyanides to afford the corresponding furo[2,3-d]pyrimidine-2,4(1H,3H)-diones, in water, in high yields after several minutes are reported.
的环境友好的三个组分缩合反应N,N- ' -dimethylbarbituric酸,4-硝基苯甲醛和烷基或芳基异腈,得到相应的呋喃并[2,3- d ]嘧啶-2,4(1 ħ,3 ħ) -据报道,数分钟后,水中的二酮含量高。
A Novel Approach for the Synthesis of Furopyrimidine and Oxobenzofuran Derivatives
A novel, efficient one‐pot approach for the synthesis of furopyrimidine and oxobenzofuranderivatives 4 by a multicomponent reaction of an isocyanide, an aldehyde, and a CH‐acid compound in CH2Cl2 is reported (Scheme 1 and Table). The reactions were completed after 20 h at room temperature. This method has the advantages of high yields, simple methodology, and easy workup.
The three-component condensation of aldehyde, N,N'-dimethylbarbituric acid and alkyl or aryl isocyanide afforded the corresponding furo[2,3-d]pyrimidine-2,4(1H,3H)-diones in 1-butyl-3-methylimidazolium bromide as an ionic liquid in high yields at room temperature within several minutes.
Microwave‐Assisted Three‐Component Condensation on Montmorillonite K10: Solvent‐Free Synthesis of Furopyrimidines, Furocoumarins, and Furopyranones
Rapid and efficient one-pot three-component condensation synthesis of furopyrimidines, furocoumarins, and furopyranones are described which occur in the presence of montmorillonite K10 using microwave irradiation under solvent-free conditions.