Latent Nucleophiles in Lewis Base Catalyzed Enantioselective
<i>N</i>
‐Allylations of N‐Heterocycles
作者:You Zi、Markus Lange、Constanze Schultz、Ivan Vilotijevic
DOI:10.1002/anie.201903392
日期:2019.7.29
Latent nucleophiles are compounds that are themselves not nucleophilic but can produce a strong nucleophile when activated. Such nucleophiles can expand the scope of Lewis base catalyzed reactions. As a proof of concept, we report that N‐silyl pyrroles, indoles, and carbazoles serve as latent N‐centered nucleophiles in substitution reactions of allylic fluorides catalyzed by Lewis bases. The reactions
潜在亲核试剂是本身不是亲核试剂,但在激活后会产生强亲核试剂的化合物。这样的亲核试剂可以扩大路易斯碱催化反应的范围。作为概念的证明,我们报道了在路易斯碱催化的烯丙基氟化物的取代反应中,N硅烷基吡咯,吲哚和咔唑可作为潜在的N中心亲核试剂。当使用手性金鸡纳生物碱催化剂时,两个反应伙伴的反应范围广,具有出色的区域选择性,并能产生对映体富集的N-烯丙基吡咯,吲哚和咔唑。