Synthesis of 2-Amino-1,3-selenazoles by Reaction of N,N-Unsubstituted Selenoureas with a,b-Unsaturated Aldehydes
作者:Mamoru Koketsu、Koichi Kanoh、Hideharu Ishihara
DOI:10.3987/com-06-10893
日期:——
2-Dialkylamino-l,3-selenazoles were obtained by the reaction of N,N-unsubstitutedselenoureas with α,β-unsaturated aldehydes in alcohol in the presence of ferric chloride at room temperature.
A Simple Route to <i>N</i>,<i>N</i>-Disubstituted Selenoureas from N,N-Disubstituted Cyanamides
作者:Horst Hartmann、Dietmar Keil
DOI:10.1055/s-2003-44349
日期:——
N,N-Disubstituted selenoureas 4 can be obtained in satisfactory yields by addition of an acid to a mixture of freshly prepared sodium selenide and N,N-disubstituted cyanamides 5.
Preparation of 2-Amino-4<i>H</i>-5,6-dihydro-1,3-selenazin-4-ones by Reaction of N,N-Unsubstituted Selenoureas with α,β-Unsaturated Acid Chlorides
作者:Mamoru Koketsu、Koichi Kanoh、Hideharu Ishihara
DOI:10.1055/s-2007-983820
日期:2007.9
2-Dialkylamino-4 H-5,6-dihydro-1,3-selenazin-4-ones were obtained by the reaction of N,N-unsubstituted selenoureas with α,β-unsaturated acid chlorides at room temperature.
Preparation of 2-Amino-1,3-selenazoles by Reaction of N,N-Unsubstituted Selenoureas with a,b-Unsaturated Ketones in Alcohol
作者:Mamoru Koketsu、Koichi Kanoh、Hideharu Ishihara
DOI:10.3987/com-06-10813
日期:——
2-Dialkylamino-1,3-selenazoles were yielded by the reaction of N,N-unsubstitutedselenoureas with α,β-unsaturated ketones in alcohol in the presence of ferric chloride at room temperature.
We investigated the superoxide anion scavenging effects of thirteen 2-amino-1,3-selenazoles using a highly sensitive quantitative chemiluminescence method. At 166 μM, the 2-amino-1,3-selenazoles scavenged in the range of 14.3 to 96.7% of O2−. 2-Piperidino-1,3-selenazole and 4-phenyl-2-piperidino-1,3-selenazole exhibited the strongest superoxide anion-scavenging activity among the 2-amino-1,3-selenazoles. The 50% inhibitory concentrations (IC50) of 2-piperidino-1,3-selenazole and 4-phenyl-2-piperidino-1,3-selenazole were determined to be 4.03 μM and 92.6 μM, respectively. Thus, these compounds acted in vitro as effective O2− scavengers.