compounds containing at least one core moiety of pyrano[2,3-d]pyrimidine have received considerable attention in synthetic organic chemistry because of their potential as drugs and bioactive compounds. Pyrano[2,3-d]pyrimidines have attracted interest in medicine as antitumor, anti-hypertensive, antibacterial and antileishmanial drugs. Pyrano[2,3-d]pyrimidines have been produced by a number of methods. A
The first urea-based ionic liquid-stabilized magnetic nanoparticles: an efficient catalyst for the synthesis of bis(indolyl)methanes and pyrano[2,3-<i>d</i>]pyrimidinone derivatives
作者:Mohammad Ali Zolfigol、Roya Ayazi-Nasrabadi、Saeed Baghery
DOI:10.1002/aoc.3428
日期:2016.5
of bis(indolyl)methane derivatives via the condensation reaction between 2‐methylindole and aldehydes at room temperature under solvent‐free conditions. Also, pyrano[2,3‐d]pyrimidinone derivatives were prepared in the presence of the nanomagnetic urea‐based catalyst by the one‐pot three‐component condensation reaction of 1,3‐dimethylbarbituric acid, aldehydes and malononitrile under solvent‐free conditions
基于尿素的离子液体稳定在二氧化硅包覆的Fe 3 O 4磁性纳米颗粒上,Fe 3 O 4 @SiO 2 @(CH 2)3-尿素-SO 3H / HCl}是碱土中一种无与伦比的,平滑释放的尿素肥料,并通过傅立叶变换红外光谱,可见光和能量分散的X射线光谱,X射线衍射,扫描和透射电子显微镜,原子能对其进行了全面表征。力显微镜和热重分析。纳米结构催化剂是一种新型,绿色,高效的催化剂,它通过2-甲基吲哚与醛在室温下在无溶剂条件下的缩合反应用于合成双(吲哚基)甲烷衍生物。另外,吡喃并[2,3- d] pyrimidinone衍生物是在纳米磁性脲基催化剂存在下,在60°C无溶剂条件下,通过1,3-二甲基巴比妥酸,醛和丙二腈的单锅三组分缩合反应制备的。据我们所知,这是首次合成在二氧化硅包覆的Fe 3 O 4磁性纳米粒子上稳定的脲基离子液体的报告。因此,当前的工作可以在合理设计,合成和应用特定任务的基于肥料
L-Proline based ionic liquid: A highly efficient and homogenous catalyst for synthesis of 5-benzylidene-1,3-dimethylpyrimidine-2,4,6(1H,3H,5H)-trione and pyrano[2,3-d] pyrimidine diones under ultrasonic irradiation
作者:Paresh G. Patil、Yuvraj Satkar、Dhananjay H. More
DOI:10.1080/00397911.2020.1811987
日期:2020.12.16
Abstract A catalytic, practical, efficient procedure for the synthesis of 5-benzylidene-1,3-dimethylpyrimidine-2,4,6(1H,3H,5H)-trione and pyrano[2,3-d] pyrimidine diones at roomtemperature was developed using L-Proline nitrate ionic liquid under ultrasonic irradiation. The L-Proline nitrate is homogeneous and green catalyst easy to prepare by mixing L-Proline and nitric acid possess excellent catalytic
Choline chloride/pentaerythritol: a deep eutectic solvent for the synthesis of pyran and chromene derivatives
作者:Setareh Azimzadeh-Sadeghi、Issa Yavari
DOI:10.1007/s13738-020-02108-5
日期:2021.6
Abstract A novel deepeutecticsolvent system was prepared by mixing choline chloride as a hydrogen-bond acceptor with 2,2-bis(hydroxymethyl)propane-1,3-diol (pentaerythritol) as a hydrogen-bond donor. This greensolvent was used for the one-potsynthesis of pyran and chromenederivatives from aromatic aldehydes, 1,3-dicarbonyl compounds, and malononitrile. The solvent was readily recycled and can
SO<sub>3</sub>H-functionalized nano-MGO-D-NH<sub>2</sub>: Synthesis, characterization and application for one-pot synthesis of pyrano[2,3-<i>d</i>]pyrimidinone and tetrahydrobenzo[<i>b</i>]pyran derivatives in aqueous media
作者:Heshmatollah Alinezhad、Mehrasa Tarahomi、Behrooz Maleki、Amirhassan Amiri
DOI:10.1002/aoc.4661
日期:2019.3
of a magneticgrapheneoxide (GO) nanohybrid and evaluated in the synthesis of tetrahydrobenzo[b]pyran and pyrano[2,3‐d]pyrimidinone derivatives. The GO/Fe3O4 (MGO) hybrid was prepared via an improved Hummers method followed by the covalent attachment of 1,4‐butanesultone with the amino group of the as‐prepared polyamidoamine‐functionalized MGO (MGO‐D‐NH2) to give double‐functionalized magnetic nanoparticles
SO 3 H-官能化的纳米MGO-D-NH 2催化剂是通过磁性氧化石墨烯(GO)纳米杂化物的多官能化制备的,并在四氢苯并[ b ]吡喃和吡喃[2,3- d ]嘧啶酮衍生物。通过改进的Hummers方法制备GO / Fe 3 O 4(MGO)杂化物,然后将1,4-丁磺酸内酯与已制备的聚酰胺型胺官能化MGO(MGO-D-NH 2)得到双功能化的磁性纳米粒子作为催化剂。表征所制备的纳米颗粒以确认其合成并精确确定其理化性质。总之,就反应时间和产物产率而言,制备的催化剂显示出显着的可循环性和催化性能。希望这项研究的结果有助于开发新型的非均相催化剂,以显示出高性能并作为工业应用的优秀候选者。