Department of Chemistry, Texas A&M University, College Station, TX 77843-3255, USA.
Molecules. 2021 Apr 1;26(7):1985. doi: 10.3390/molecules26071985.
As part of our continuing interest in the chemistry of cationic antimony Lewis acids as ligands for late transition metals, we have now investigated the synthesis of platinum complexes featuring a triarylstibine ligand substituted by an -[(dimethylamino)methyl]phenyl group referred to as Ar. More specifically, we describe the synthesis of the amino stibine ligand PhSbAr () and its platinum dichloride complex [PtCl]Cl which exists as a chloride salt and which shows weak coordination of the amino group to the antimony center. We also report the conversion of [PtCl]Cl into a tricationic complex [HPt(SMe)] which has been isolated as a tris-triflate salt after reaction of [PtCl]Cl with SMe, HOTf and AgOTf. Finally, we show that [HPt(SMe)][OTf] acts as a catalyst for the cyclization of 2-allyl-2-(2-propynyl)malonate.
作为我们对阳离子型锑路易斯酸作为晚期过渡金属配体的化学研究的一部分，我们现在已经研究了具有三芳基锑配体的铂配合物的合成，该配体被一个 -[(二甲基氨基)甲基]苯基取代，称为 Ar。更具体地说，我们描述了氨基锑配体 PhSbAr ()的合成及其铂二氯化物配合物 [PtCl]Cl，其作为氯化物盐存在，并且显示出氨基对锑中心的弱配位。我们还报告了 [PtCl]Cl 转化为三价阳离子配合物 [HPt(SMe)]，该配合物在与 SMe、HOTf 和 AgOTf 反应后作为三氟甲磺酸根盐分离得到。最后，我们表明 [HPt(SMe)][OTf] 可以作为 2-烯丙基-2-(2-丙炔基)丙二酸酯环化反应的催化剂。
