Palladium-catalyzed formation of 3,5-diaryl-1,2,4-selenadiazoles from arylselenocarboxamide
作者:Ali Z. Al-Rubaie、Lina Z. Yousif、Ali J.H. Al-Hamad
DOI:10.1016/s0022-328x(02)01631-5
日期:2002.8
been prepared in high yields by the reaction of arylnitrile with NaHSe. Treatment of arylselenocarboxamides (4 mmol) with aqueous Na2PdCl4 (1 mmol) in acetone at room temperature resulted in the formation of 3,5-diaryl-1,2,4-selenadiazoles as unexpected products together with palladium(II) complexes containing 3,5-diaryl-1,2,4-selenadiazoles. Treatment of arylselenocarboxamides (4 mmol) with catalytic
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