许多新的和已知的芳基硒甲酰胺(即Ar – C(Se)NH 2; Ar = C 6 H 5(1),4-BrC 6 H 4(2),2-MeOC 6 H 4(3),4 -MeOC 6 H 4(4),4-MeSC 6 H 4(5),4-EtOC 6 H 4(6),2,3-(MeO)2 C 6 H 3(7),3,4-( MeO)2 C 6 H3(8),3,5-(MeO)2 C 6 H 3(9),4-PhC 6 H 4(10),6-MeOC 10 H 6(11),4-MeOC 10 H 6(12) )已通过芳腈与NaHSe反应以高收率制备。Na 2 PdCl 4水溶液处理芳基硒甲酰胺(4 mmol)(1 mmol)在室温下的丙酮溶液中导致形成3,5-二芳基-1,2,4-硒代二唑类化合物,以及包含3,5-二芳基-1,2,4-的钯(II)配合物,出乎意料亚硒二唑。用催化量的Na 2 PdCl 4(10 -3
The facile and efficient organocatalytic platform for accessing 1,2,4-selenadiazoles and thiadiazoles under aerobic conditions
作者:V.P. Rama Kishore Putta、Raghuram Gujjarappa、Nagaraju Vodnala、Richa Gupta、Prasad P. Pujar、Chandi C. Malakar
DOI:10.1016/j.tetlet.2018.01.063
日期:2018.3
The first organocatalytic approach towards synthesis of rarely explored 1,2,4-selenadiazole and thiadiazole scaffolds have been devised using corresponding carboxamides as substrates. The transformations were realized using two distinct conditions in the presence of catalytic vitamin B3 or thiourea underaerobicconditions. Developed methods overcome the associated limitations of previous reported
Straightforward and Expeditious One-Pot Tandem Synthesis of 3,5-Diaryl-1,2,4-Selenadiazoles from Aryl Nitriles
作者:Sahar Majnooni、Zainab Almansaf、Miu Tsuji、Ahmad R. Khosropour、Hassan Zali-Boeini、M. Hassan Beyzavi
DOI:10.1055/s-0039-1690126
日期:2019.11
synthesis of 3,5-diaryl-1,2,4-selenadiazoles from aryl nitriles has been developed. This tandem transformation was performed in excellent yields (91–98%) via in situ selenoamidation and a subsequent oxidative dimerization reaction. This method features relatively mild reaction conditions, operational simplicity, straightforward separation of the products, and the utilization of inexpensive reagents. A one-pot
A simple and efficient method for the dimerization of primary thioamides into 1,2,4-thiadiazoles using tert-butyl nitrite is described. The optimized condition was also found to be suitable for the dimerization of benzoselenoamides into 1,2,4-selenadiazoles. All the reactions proceed smoothly at room temperature and gave the desired products in excellent yields in a short span of time. (C) 2017 Elsevier Ltd. All rights reserved.
A Convenient Synthesis of 3,5-Diaryl-1,2,4-selenadiazoles
作者:Xian Huang、Jiangmin Chen
DOI:10.1081/scc-120022171
日期:2003.1.8
3,5-Diaryl-1,2,4-selenadiazoles were prepared in high yields from primary selenoamides using poly[styrene(iodosodiacetate)] as oxidant. The polymer reagent could be regenerated and reused.