intermolecular cycloaddition to give mono-(1a–d) and bis-2,3-dihydro-1,2,4-oxadiazole (2a–d) complexes (Ar/R′′ = p-tol/Me: R′2 = Me2a, R′2 = Et2b, R′2 = C5H10c; Ar/R′′ = p-MeOC6H4/CH2Ph: R′2 = Me2d). All complexes were characterized by elemental analyses (C, H, N), high resolution ESI-MS, IR, 1H and 13C1H} NMR spectroscopy. The structures of trans-1b, trans-2a, trans-2c, and trans-2d were determined by single-crystal
的Pt II配位的NCNR' 2种如此高度朝向1,3-偶极环加成(DCA),它们与所述无环硝酮拱顺利反应活化Ñ +(O -)R''(
氩/ R''= C 6 H ^ Z形式的4 Me- p / Me; C 6 H 4 OMe- p / CH 2 Ph)。之间DCA的竞争性反应性研究反式- [
氯铂酸2(NCR)2 ](R = P h和NR' 2)物种和无环硝酮4-M
EC 6 ħ 4 CH Ñ+(O - )我展示了协调NCPH和NCNR'的可比反应2,而烷基腈
配体不与所述偶极反应。之间的反应的反式- [
氯铂酸2(NCNR' 2) 2 ](R' 2 =我2,等2,C 5 H ^ 10)和所述硝酮进行如下两个连续的步骤的分子间环加成,得到单- ( 1A-d)和双-2,3-二氢-
1,2,4-恶二唑(图2a-d )复合物(
氩/ R''= p -tol / Me的:R' 2 =我2一个,R' 2 =的Et