作者:Di You、Jesse E. Smith、Srobona Sen、François P. Gabbaï
DOI:10.1021/acs.organomet.0c00193
日期:2020.12.14
([(o-(R2P)C6H4)2SbCl2]PtCl (R = Ph, iPr)) with 3 equiv of AgOTf. The crystal structures of 2 and 4 confirmed that the chloride ligands have been fully substituted by more labile triflate ligands. Despite structural similarities in the dinuclear cores of 2 and 4, only 2 acts as a potent carbophilic catalyst in enyne cyclization reactions. The high activity of 2 is also reflected by its ability to promote
与显影电后过渡金属催化剂的视图,我们现在已合成[(ø - (PH 2 P)C ^ 6 ħ 4)2的Sb(OTF)2 ]的Pt(OTF)(2)和[(ø - (i Pr 2 P)C 6 H 4)2 Sb(OTf)2 ] Pt(OTf)(4)通过处理相应的三氯化物([(o-(R 2 P)C 6 H 4)2 SbCl 2 ] PtCl(R = Ph,iPr))与3当量的AgOTf。2和4的晶体结构证实氯化物配体已被更不稳定的三氟甲磺酸酯配体完全取代。尽管2和4的双核核心在结构上相似,但只有2个在烯炔环化反应中充当有效的嗜碳催化剂。的高活性2也通过其促进加成吡咯和噻吩衍生物,以炔能力反射。结构和计算分析表明2的出色反应性来自有利的空间效应和电子效应。最后比较2使用先前报道的自活化催化剂[(o-(Ph 2 P)C 6 H 4)2 Sb(OTf)2 ] PtCl强调了三氟甲磺酸盐对氯取代的好处。