Novel phosphonated bicyclic frameworks from Diels–Alder reaction as chelating agents of di- and trivalent metal cations
作者:Elise Villemin、Benjamin Elias、Raphaël Robiette、Koen Robeyns、Marie-France Herent、Jean-Louis Habib-Jiwan、Jacqueline Marchand-Brynaert
DOI:10.1016/j.tetlet.2011.07.116
日期:2011.10
The synthesis of novel [4+2] cycloadducts by Diels–Alder (DA) reaction between diethyl 1-phosphono-1,3-butadiene and cyclic CC and NN dienophiles, such as maleimide and 1,2,4-triazole-3,5-dione derivatives, is described. These phosphonated bicyclic frameworks feature a cage shape enabling metal chelation. Indeed, stable complexes were formed in solution with M2+ and M3+ metal cations, as evidenced
1-乙基膦酰基-1,3-丁二烯与环状C C和N N二烯亲核试剂如马来酰亚胺和1,2,4-三唑-之间的Diels-Alder(DA)反应合成新型[4 + 2]环加合物描述了3,5-二酮衍生物。这些膦酸化的双环骨架具有笼状形状,可实现金属螯合。实际上,如ERMS模式下的HRMS(电喷雾电离)所示,在含有M 2+和M 3+金属阳离子的溶液中形成了稳定的络合物。根据阳离子的性质,鉴定出L 1:M(一种配体一金属)和L 2:M(两种配体一金属)配合物。