A General Palladium-Phosphine Complex To Explore Aryl Tosylates in the N-Arylation of Amines: Scope and Limitations
作者:Pui Ying Choy、Kin Ho Chung、Qingjing Yang、Chau Ming So、Raymond Wai-Yin Sun、Fuk Yee Kwong
DOI:10.1002/asia.201800575
日期:2018.9.4
heterocycles such as indole, carbazole, pyrrole, 10‐phenothiazine, and 10‐phenoxazine were shown to be feasible coupling partners under this catalytic system. The described reaction conditions tolerate a wide range of functional groups and allow an array of aromatic amines as well as unsymmetrical amine products to be easily accessed from the various phenolic derivatives. Interestingly, this catalyst
提出了使用芳基和杂芳基甲苯磺酸盐对各种胺进行单选择性N-芳基化反应的范围和局限性。空气稳定且易于接近的Pd(OAc)2 / CM-phos CM-phos = 2- [2-(二环己基膦基)苯基] -1-甲基-1 H-吲哚}催化剂体系能够处理各种芳基甲苯磺酸酯底物以及胺亲核试剂,包括伯和仲环状/无环脂族胺和苯胺。在这种催化体系下,含NH的杂环如吲哚,咔唑,吡咯,10-吩噻嗪和10-吩恶嗪被证明是可行的偶联伙伴。所描述的反应条件容许宽范围的官能团,并允许从各种酚衍生物容易地获得一系列的芳族胺以及不对称胺产物。有趣的是,该催化剂体系甚至提供了在水介质中进行反应的机会。我们还报道了旋光性α-中心手性胺与芳基甲苯磺酸盐的分子间偶联,而没有削弱对映体的纯度。