Dinuclear manganese alkoxide complexes as catalysts for C–N bond cleavage of simple tertiary <i>N</i>,<i>N</i>-dialkylamides to give esters
作者:Haruki Nagae、Takahiro Hirai、Daiki Kato、Shusei Soma、Shin-ya Akebi、Kazushi Mashima
DOI:10.1039/c8sc05819a
日期:——
give corresponding esters using a catalyst system (2 mol% based on Mn atoms) of a tetranuclear manganese alkoxide, [Mn(acac)(OEt)(EtOH)]4 (1c), combined with four equivalents of 4,7-bis(dimethylamino)-1,10-phenanthroline (L1: Me2N-Phen). Regarding the reaction mechanism, we isolated a dinuclear manganese complex, [Mn(acac)(OEt)(Phen)]2 (6c), which was revealed as the catalytically active species for
由于氮孤对和羰基部分之间的共振,酰胺键是稳定的,因此涉及C-N键裂变的酰胺,特别是叔酰胺的化学转化被认为是最困难的有机反应之一,不可避免地需要苛刻的反应条件和强酸或强碱。我们报道了使用四核锰醇盐 [Mn(acac)(OEt)(EtOH) 的催化剂系统(基于 Mn 原子的 2 mol%)催化简单叔 N , N -二烷基酰胺的 C-N 键断裂,得到相应的酯)] 4 ( 1c ),与四当量的 4,7-双(二甲氨基)-1,10-菲咯啉 ( L1 : Me 2 N-Phen) 组合。关于反应机理,我们分离出一种双核锰配合物[Mn(acac)(OEt)(Phen)] 2 ( 6c ),它被认为是叔酰胺酯化反应的催化活性物质。