Air- and water-stable Lewis acids: synthesis and reactivity of P-trifluoromethyl electrophilic phosphonium cations
作者:V. Fasano、J. H. W. LaFortune、J. M. Bayne、M. J. Ingleson、D. W. Stephan
DOI:10.1039/c7cc09128a
日期:——
A new class of electrophilic phosphonium cations (EPCs) containing a –CF3 group attached to the phosphorus(V) center is readily accessible in high yields, via a scalable process. These species are stable to air, water, alcohol and strong Brønsted acid, even at raised temperatures. Thus, P–CF3 EPCs are more robust than previously reported EPCs containing P–X moieties (X = F, Cl, OR), and despite their
通过可扩展的过程,可以容易地以高收率获得新型的亲电phospho阳离子(EPC),该亲电phospho阳离子包含一个连接至phosphor(V)中心的–CF 3基团。这些物质即使在升高的温度下也对空气,水,酒精和强布朗斯台德酸稳定。因此,P–CF 3 EPC比先前报道的含P–X部分(X = F,Cl,OR)的EPC更坚固,尽管其路易斯酸度降低,它们仍可作为路易斯酸催化剂使用,而无需无水反应条件。