纳米二氧化硅负载FeCl_3作为一种高效多相催化剂用于合成1,2,4-三嗪衍生物(英文)

• 作 者: Davood Habibi Somayyeh Vakili
• 机 构: Department of Organic Chemistry, Faculty of Chemistry, Bu-Ali Sina University,
• 出 处: 催化学报
• 发表日期: 2015年04期
• 关键词: 纳米二氧化硅 多相催化剂 sized 三嗪 silica successive triazine catalyzed separated adsorbent

The one-pot synthesis of a series of 1,2,4-triazines from the reactions of semicarbazide or thiosemi-carbazide with various α,β-dicarbonyl compounds under reflux conditions in a EtO H-H2O (9:1) mixture as solvent and catalyzed by nano-sized silica supported FeCl3(FeCl3@SiO 2) was investigat-ed. The FeCl3 content of the catalyst was measured by atomic absorption to get the adsorption ca-pacity. The reactions gave high yields of the product and the catalyst was easily separated and re-used for successive reaction runs without significant loss of activity.

The one-pot synthesis of a series of 1,2,4-triazines from the reactions of semicarbazide or thiosemi-carbazide with various α, β-dicarbonyl compounds under reflux conditions in a EtO H-H2O (9: 1) mixture as solvent and catalyzed by nano-sized silica supported FeCl3 (FeCl3 @ SiO 2) was researat-ed. The FeCl3 content of the catalyst was measured by atomic absorption to get the adsorption ca-pacity. The reactions gave high yields of the product and the catalyst was easily separated and re-used for successive reaction runs without significant loss of activity.