A mild and highly efficient method for the synthesis of 5-aryl-(<i>N</i>-phenyl-)6<i>H</i>-1,3,4-thiadiazin-2-aminium salts using reusable heterogeneous catalysts
作者:Shahnaz Rostamizadeh、Nasrin Shadjou、Ali M. Amani、Reza Aryan
DOI:10.1002/jhet.5570450631
日期:2008.11
m and 5-aryl-N-phenyl-6H-1,3,4-thiadiazin-2-aminium salts have efficiently been synthesized from the reaction of thiosemicarbazide and α-haloketones in acetonitrile at room temperature using i) silicasupportedsodiumhydrogen sulfate and ii) silica sulfuric acid as reusable heterogeneous catalysts. The experimental procedure is simple and the products are obtained in high yields.
从以下反应可有效地合成5-芳基-6 H -1,3,4-噻二嗪-2-铵和5-芳基-N-苯基-6 H -1,3,4-噻二嗪-2-铵盐使用i)二氧化硅负载的硫酸氢钠和ii)二氧化硅硫酸作为可重复使用的非均相催化剂,在室温下在乙腈中制备thiosemicarbazide和α-卤代酮。实验过程很简单,并且以高收率获得了产物。
Silica Phosphoric Acid (SPA) as a Highly Active, Reusable, Heterogeneous Catalyst for the Synthesis of 2-Amino/Anilino-5-ARYL-1,3,4-Thiadiazine Bromide Derivatives
作者:Shahnaz Rostamizadeh、Ali Mohammad Amani、Nasrin Shadjou
DOI:10.1080/10426500903486714
日期:2012.2.1
Silica phosphoric acid has been found to be an efficient catalyst for the synthesis of 2-amino/anilino-5-aryl-1,3,4-thiadiazine bromide derivatives from the reaction of thiosemicarbazide and α-bromoketones in acetonitrile at room temperature. The catalyst can be reused for four times without any significant loss of catalytic activity. The experimental procedure is simple, and the products are obtained