Highly Regioselective Aromatic C–H Allylation of <i>N</i>-(Arylmethyl)sulfonimides with Allyl Grignard Reagents Involving Benzylic C–N Cleavage
作者:Meng-Zeng Zhu、Dong Xie、Shi-Kai Tian
DOI:10.1021/acs.orglett.1c02437
日期:2021.9.3
C–H functionalization of benzyl electrophiles with nucleophiles via palladium-catalyzed benzylic C–N cleavage. A range of N-(1-naphthylmethyl)sulfonimides, N-(2-thienylmethyl)sulfonimides, and N-(2-furanylmethyl)sulfonimides smoothly underwent palladium-catalyzed aromatic C–H allylation with allyl Grignard reagents at room temperature, delivering structurally diverse substituted 1-allylnaphthalenes and
已经建立了一对新的反应伙伴,用于通过钯催化的苄基 C-N 裂解将苄基亲电试剂与亲核试剂的芳族 C-H 官能化。一系列N- (1-萘基甲基)磺酰亚胺、N- (2-噻吩基甲基)磺酰亚胺和N- (2-呋喃基甲基)磺酰亚胺在室温下与烯丙基格氏试剂顺利进行钯催化的芳族 C-H 烯丙基化,在结构上传递多种取代的 1-烯丙基萘和 2-烯丙基杂芳烃,产率中等至极好,具有极高的区域选择性。更换N-(芳甲基)磺酰亚胺与(芳甲基)铵盐、芳甲基氯化物或芳甲基磷酸酯作为苄基亲电试剂导致区域选择性的显着侵蚀。