833433-13-9Relevant articles and documents
A novel magnetically recyclable silver-loaded cellulose-based bionanocomposite catalyst for green synthesis of tetrazolo[1,5-a]pyrimidines
Maleki, Ali,Ravaghi, Parisa,Aghaei, Morteza,Movahed, Hamed
, p. 5485 - 5494 (2017/09/23)
5-Methyl-7-aryl-4,7-dihydrotetrazolo[1,5-a]pyrimidine-6-carboxylic ester derivatives were efficiently synthesized by reaction of methyl or ethyl acetoacetate, 5-aminotetrazole (produced from 2-cyanoguanidine and sodium azide), and various aromatic aldehydes in presence of a new cellulose-based Ag-loaded magnetic bionanostructure. This protocol offers many advantages such as short reaction time, high yield, the remarkable magnetic property of the nanocomposite, and easy separation of the nanocatalyst from the reaction mixture without considerable loss of catalytic activity. Furthermore, X-ray diffraction analysis, field-emission scanning electron microscopy, and energy-dispersive X-ray (EDX) analysis were used to characterize the prepared nanocatalyst.
Solvent-free synthesis of 5-methyl-7-aryl-4,7-dihydrotetrazolo[1,5-a] pyrimidine-6-carboxylic esters catalyzed by sulfamic acid
Yao, Changsheng,Lei, Song,Wang, Cuihua,Vu, Chenxia,Tu, Shujiang
scheme or table, p. 1609 - 1613 (2009/06/21)
(Chemical Equation Presented) The solvent-free synthesis of 5-methyl-7-aryl-4,7-dihydrotetrazolo[1,5-a]pyrimidine-6-carboxylic esters was performed and effectively catalyzed by sulfamic acid. Compared with conventional methods, this protocol features mild reaction conditions and high yields. Furthermore, it is solvent-free and thus ecofriendly.