for their derivatization are still limited. Previously, several enantioselective allylation reactions of benzimidazoles were reported that functionalize the nucleophilic nitrogen atom. Herein we describe a reversal of this inherent selectivity toward N-allylation by using electrophilic N-OPiv benzimidazoles with readily available 1,3-dienes as nucleophile precursors. This CuH-catalyzed approach utilizes
尽管取代的
苯并咪唑是
生物活性小分子中常见的亚结构,但其衍生化的合成方法仍然有限。以前,据报道
苯并咪唑的几种对映选择性烯丙基化反应可将亲核氮原子官能化。在本文中,我们描述了通过使用亲电子N -OPiv
苯并咪唑和容易获得的 1,3-二烯作为亲核试剂前体来逆转这种对N-烯丙基化的固有选择性。这种CuH催化的方法利用温和的反应条件,表现出广泛的官能团相容性,并专门形成具有优异立体选择性的C2-烯丙基化产物。