作者:Shū Kobayashi、Kentaro Kakumoto、Masaharu Sugiura
DOI:10.1021/ol0256163
日期:2002.4.1
aza-Michael reactions of enones with carbamates efficiently. The catalytic activity was strongly dependent on the nature of the metal salts. While conventional Lewis acids such as BF(3).OEt(2), AlCl(3), or TiCl(4) showed lower activity, group 7-11 transition metal salts in higher oxidation states such as ReCl(5), Fe(ClO(4))(3).9H(2)O, RuCl(3).nH(2)O, OsCl(3).3H(2)O, RhCl(3).nH(2)O, PtCl(4).5H(2)O, or
发现几种过渡金属盐可有效催化烯酮与氨基甲酸酯的氮杂-迈克尔反应。催化活性强烈取决于金属盐的性质。传统的路易斯酸如BF(3).OEt(2),AlCl(3)或TiCl(4)表现出较低的活性,而第7-11组过渡金属盐处于较高的氧化态,如ReCl(5),Fe( ClO(4))(3).9H(2)O,RuCl(3).nH(2)O,OsCl(3).3H(2)O,RhCl(3).nH(2)O,PtCl( 4).5H(2)O或AuCl(3).H(2)O表现出更高的催化活性。[反应:看文字]