One-Pot DBU-Promoted Synthesis of Hydroacridinones and Spirohexahydropyrimidines
摘要:
The potential hydroacridinone synthesis using simple and inexpensive starting materials, namely 1,3-dicarbonyl compounds, anilines, formaldehyde and DBU as a stoichiometric base was explored. As a result, from the reaction of 1,3-cyclohexanedione and dimedone tetrahydroacridinones were the main reaction products along with small yields of their oxidation products, the dihydroacridinones, whereas in the case of 2-acetylcyclohexanone spirohexahydropyrimidines were isolated in very good yields. Plausible mechanistic schemes for the formation of all products are proposed.
Supported Preyssler Nanoparticles in Synthesis of 1,3-Diaryl-5-Spirohexahydropyrimidines
作者:Majid M. Heravi、Samaheh Sadjadi、Sodeh Sadjadi、Hossein A. Oskooie、Rahim Hekmat Shoar、Fatemeh F. Bamoharram
DOI:10.1002/jccs.200900035
日期:2009.4
Silica‐supportedPreysslernanoparticles (H14[NaP5W30O110])/SiO2 are used as a new and recyclable catalyst for the preparation of 1,3‐diaryl‐5‐spirohexahydropyrimidines via a one‐pot condensation of anilines, formaldehyde, and cyclohexanone.
二氧化硅支撑的Preyssler纳米颗粒(H 14 [NaP 5 W 30 O 110 ])/ SiO 2被用作一种新型可循环使用的催化剂,可通过苯胺的一锅缩合制备1,3-二芳基-5-螺六氢嘧啶,甲醛和环己酮。
Metal free green protocol for the synthesis of bis-spiro piperidine and pyrimidine derivatives
作者:Audumbar Patil、Rajashri Salunkhe
DOI:10.1007/s11164-018-3310-7
日期:2018.5
one-pot three-component synthesis of bis-spiro piperidine and pyrimidinederivatives has been reported by performing the reaction of formaldehyde, aromatic aniline and 1,3-dicarbonyl compounds. This reaction was carried out at room temperature in 2,2,2-trifluoroethanol (TFE) as a recyclable reactionmedium under the metal free condition. The strong hydrogen donor ability and acidic property of TFE plays
Dy/chitosan: a highly efficient and recyclable heterogeneous nano catalyst for the synthesis of hexahydropyrimidines in aqueous media
作者:Nayeem Ahmed、Saima Tarannum、Zeba N. Siddiqui
DOI:10.1039/c5ra08160b
日期:——
Dy(iii)/chitosan as a recyclable and heterogeneous catalyst is used for the sustainable preparation of hexahydropyrimidine derivatives in aqueous media.
Dy(iii)/壳聚糖作为可回收和杂化催化剂,用于在水性介质中可持续制备六氢嘧啶衍生物。
New Light on an Old Story: Facile and Efficient Synthesis of 1,3-Diaryl-5-spirohexahydro- pyrimidines via a Six-Molecule, Three-Component Mannich-Type Reaction
A facile and efficient synthesis of I,3-diaryl-5-spirohexahy-dropyrimidines via a one-pot condensation of anilines, formaldehyde, and cyclohexanones is reported. In this one-pot, three-component reaction, six molecules of reactants are involved and six new covalent bonds are generated. Bicyclic products are obtained from the starting materials in one pot using readily available starting materials and catalysts.
One-Pot DBU-Promoted Synthesis of Hydroacridinones and Spirohexahydropyrimidines
The potential hydroacridinone synthesis using simple and inexpensive starting materials, namely 1,3-dicarbonyl compounds, anilines, formaldehyde and DBU as a stoichiometric base was explored. As a result, from the reaction of 1,3-cyclohexanedione and dimedone tetrahydroacridinones were the main reaction products along with small yields of their oxidation products, the dihydroacridinones, whereas in the case of 2-acetylcyclohexanone spirohexahydropyrimidines were isolated in very good yields. Plausible mechanistic schemes for the formation of all products are proposed.