Palladium catalyzed carbonylative generation of potent, pyridine-based acylating electrophiles for the functionalization of arenes to ketones
作者:Yi Liu、Angela M. Kaiser、Bruce A. Arndtsen
DOI:10.1039/d0sc03129a
日期:——
ultimate elimination of a new class of potent Friedel–Crafts acylating agent: N-acyl pyridinium salts. The latter can be exploited to modulate reactivity and selectivity in carbonylative arene functionalization chemistry, and allow the efficient synthesis of ketones with a diverse array of (hetero)arenes.
我们在这里描述了钯催化路线的设计,该路线通过(杂)芳烃与芳基或乙烯基三氟甲磺酸酯的羰基化偶联生成芳基酮。在这种情况下,在钯上使用大咬角的Xantphos配体提供了一条独特的途径,可以平衡相对较强的C(sp 2)-OTf键的活化与最终消除新型强力Friedel-Crafts酰化剂:N-酰基吡啶鎓盐。可以利用后者来调节羰基芳烃官能化化学中的反应性和选择性,并允许有效地合成具有多种(杂)芳烃的酮。