Mesoporous Aluminosilicate (AIKIT-5) has been found to be an efficient catalyst for one-pot synthesis of triazolo[1,2-a]indazole-1,3,8-trione derivatives from dimedone, urazole, and aromatic aldehydes using acetonitrile as a solvent. This new method is simple, effective, ecofriendly, and consistently has the advantage of excellent yields (80-96%) and short reaction time (30-60 min). The effect of the catalyst weight, aluminum content in the catalyst, and the solvents on the synthesis of triazolo[1,2-a]indazole-1,3,8-trione derivatives has been investigated. It has been found that the catalyst can be recycled for several times without much affecting its activity for a variety of organic transformations. (C) 2010 Elsevier Ltd. All rights reserved.
Microwave-promoted solvent free one-pot synthesis of triazolo[1,2-a] indazole-triones catalyzed by silica-supported La0.5Ca 0.5CrO3 nanoparticles as a new and reusable perovskite-type oxide
作者:N. Zahedi、A. Javid、M. K. Mohammadi、H. Tavakkoli
DOI:10.4314/bcse.v32i2.5
日期:——
silica-supported La 0.5 Ca 0.5 CrO 3 nanoparticles as newperovskite-type catalysts. The nano catalyst was studied by XRD, SEM and IR characterization tools. Some advantages of the proposed approach include high yield, being eco-friendly, procedure convenience and reusability of the catalyst. KEY WORDS : One-pot reaction, Triazolo[1,2-a]indazole trione, Perovskite oxide, Nano catalyst, Microwave, Solvent-free Bull
提出了通过一锅三组分的二甲酮,苯基脲基和芳香族醛的微波辅助无溶剂合成三唑并[1,2-a]吲唑-1,3,8-三酮。La 0.5 Ca 0.5 CrO 3和二氧化硅负载的La 0.5 Ca 0.5 CrO 3纳米颗粒作为新型钙钛矿型催化剂催化了该反应过程。通过XRD,SEM和IR表征工具对纳米催化剂进行了研究。所提出的方法的一些优点包括高产率,生态友好,操作方便和催化剂的可重复使用性。关键词:一锅反应,三唑并[1,2-a]吲唑三酮,钙钛矿氧化物,纳米催化剂,微波,无溶剂公牛。化学 Soc。埃塞俄比亚。2018,32(2),239-248。DOI:https://dx.doi.org/10.4314/bcse.v32i2.5