A new InCl3-catalyzed, facile and efficient method for the synthesis of spirooxindoles under conventional and solvent-free microwave conditions
作者:Gnanamani Shanthi、Ganesan Subbulakshmi、Paramasivan T. Perumal
DOI:10.1016/j.tet.2006.12.042
日期:2007.2
A simple and efficient method for the one-pot three-component synthesis of new spirooxindoles underconventional and solvent-free microwave irradiation is described.
描述了一种简单有效的方法,用于在常规和无溶剂微波辐射下一锅三组分合成新的螺毒素。
CsxH3-xPW12O40 nanoparticles dispersed in the porous network of Zr-pillared α-zirconium phosphate as efficient heterogeneous catalyst for synthesis of spirooxindoles
作者:Sagnika Pradhan、B.G. Mishra
DOI:10.1016/j.mcat.2017.12.013
日期:2018.2
Layered α-zirconiumphosphate (α-ZrP) was prepared by reflux method using ZrOCl2.8H2O and H3PO4 as precursor. The α-ZrP material was pillared with Zr-oxyhydroxy nanoclusters to prepare Zr-pillared α-zirconiumphosphate (ZZP). An enhancement in interlayer spacing, surface area and porosity was noticed as a result of Zr-pillaring. The cesium exchanged phosphotungstic acid (CsxH3-xPW12O40) nanoparticles
层状磷酸α-锆(α-的ZrP)用回流的ZrOCl方法制备2 8H 2氧,氢3 PO 4作为前体。α-ZrP材料以Zr-羟基羟基纳米团簇为基,以制备Zr柱状α-磷酸锆(ZZP)。Zr堆积导致了层间距,表面积和孔隙率的增加。将铯交换的磷钨酸(Cs x H 3-x PW 12 O 40)纳米颗粒分散在ZZP材料的多孔基质中,制备Cs x H 3-x PW 12 O 40-ZZP纳米复合材料系统。使用XRD,FTIR,UV-vis-DRS,TGA-DTA,XPS,N 2吸附,TPD,FESEM和HRTEM技术对纳米复合材料进行了表征。从XRD可以看出,α-ZrP的层状结构在立柱时发生膨胀,并随后保留在复合材料中。UV-vis和FTIR研究表明ZZP夹层中Cs x H 3-x PW 12 O 40纳米团簇的结构完整性。复合材料的表面积在80–130 m 2 g -1的范围内。与ZP和ZZP材料相比
Synthesis of Spiro[benzo[h]chromene-4,3′-indoles] and Spiro[benzo[f]chromene-1,3′-indoles]
作者:S. H. Poghosyan、M. V. Poghosyan
DOI:10.1134/s1070428019120029
日期:2019.12
New spiro heterocycles, spiro[benzo[h]chromene-4,3′-indoles] and spiro[benzo[f]chromene-1,3′-indoles], have been synthesized in 50–60% yield by three-component condensation of substituted isatins with malononitrile or ethyl cyanoacetate and naphthalen-1-ol or naphthalen-2-ol. The described reactions follow a cascade cyclization pathway and provide a regioselective method of synthesis of the title compounds
通过三组分缩合合成了新的螺环杂环,螺环[苯并[ h ]色烯-4,3'-吲哚]和螺环[苯并[ f ]色烯-1,3'-吲哚]丙二腈或氰基乙酸乙酯和萘-1-醇或萘-2-醇取代的isatins。所述反应遵循级联环化途径,并提供了区域选择性的标题化合物合成方法。