开发了一种以1,1'-(芳基亚甲基)二脲和1-芳基-2-丙酮为底物合成4,5-二芳基-3,4-二氢嘧啶-2(1 H )-酮的有效方法。反应在 Cs 2 CO 3存在下有效进行,以中等至良好的产率得到所需的产物,具有广泛的底物范围和良好的官能团耐受性,可作为先前报道的简便组装生物学方法的有吸引力的替代或补充。和具有药学活性的 3,4-二氢嘧啶-2(1 H )-酮。
Nanosilica-bonded N-(propylsulfonyl) piperazine-N-sulfamic acid as recyclable catalyst for synthesis of 1,1′-(arylmethylene) diureas and 1,3,5-triazinane-2,4-dithiones
作者:Parizad Rezaee、Jamal Davarpanah
DOI:10.1007/s11164-015-2376-8
日期:2016.9
Nanosilica-bonded N-(propylsulfonyl) piperazine-N-sulfamic acid was easily prepared by functionalizing silica nanoparticles and characterized by thermogravimetric analysis, scanning electron microscopy, infrared (IR) spectroscopy, elemental analyses, and ion-exchange pH analysis. The catalytic activity of the functionalized nanosilica for preparation of 1,1′-(arylmethylene) diureas from reaction of
Study on One-pot Biginelli-like Synthesis of Pyrazolo[3,4-<i>d</i>]pyrimidines in Bronsted Acidic Ionic Liquid Under Sonication and its Mechanism
作者:Bhautik B. Thummar、Umesh P. Tarpada、Dipak K. Raval
DOI:10.1002/jhet.1870
日期:2014.11
Pyrazolo[3,4‐d]pyrimidine derivatives were synthesized using ionic liquid, 1‐butylimidazolium tetrafluoroborate, under ultrasound irradiation at ambient condition without any added catalyst. Mechanistic pathway based on the catalytic role of ionic liquid has been proposed. This method offers the advantages of simple procedure, milder reaction condition, easier workup and improved yield over the conventional
吡唑并[3,4- d ]嘧啶衍生物是使用离子液体四氟硼酸1-丁基咪唑鎓在环境条件下超声辐照下合成的,无需添加任何催化剂。已经提出了基于离子液体催化作用的机理途径。与常规方法相比,该方法具有操作简单,反应条件温和,后处理容易和产率提高的优点。离子液体可循环使用至少三次,并保留其明显的活性。
Eco-efficiency and scalable synthesis of bisamides in deep eutectic solvent
作者:Najmedin Azizi、Masoumeh Alipour
DOI:10.1016/j.molliq.2015.02.033
日期:2015.6
Solvents define a major part of the environmental performance of processes in chemical industry and also impact on cost, safety and health issues. In order to minimize the environmental impact resulting from the use of volatile organic solvents in chemical production, a deep eutectic solvent (DES) consisting of choline chloride and urea (1:2 molar ratio) was prepared and used as the co-solvent for the preparation of gem-bisamides starting from aldehydes. The deep eutectic solvent fulfills the triple role of being a solvent, as a catalyst and as reagents, and provides a green, safe and cost-effective access to various gem-bisamides without a tedious work-up. The desired compounds were obtained in a few mm (15-120 min) with moderate to good yields (52-90%) and amenable to large scale production without significant loss in its efficiency. (C) 2015 Elsevier B.V. All rights reserved.