Herein, we present a copper-mediated C4-benzylation of 5-aminopyrazoles with 3-indoleacetic acids. Various benzylated 5-aminopyrazoles are prepared in good-to-excellent yields under basic and ligand-free conditions in the presence of copper acetate. Moreover, this benzylation method is applicable to other substrates, including naphthylamine, 2-aminochromen-4-one, and enamines. Some products exhibit
在此,我们提出了铜介导的 5-氨基吡唑与 3-吲哚乙酸的 C4-苄基化反应。在乙酸铜存在下,在碱性和无配体条件下,各种苄化 5-氨基吡唑以良好到极好的收率制备。此外,该苄化方法适用于其他底物,包括萘胺、2-氨基色素-4-酮和烯胺。一些产品对癌细胞系表现出抗增殖活性。此外,C4-苄基化产物通过一锅两步法与醛环化为1H-吡唑并[4',3':6,7]azepino[3,4- b ]吲哚;值得注意的是,环化产物表现出具有大斯托克斯位移的荧光发射。
Enantioselective α-Amination of Amides by One-Pot Organo-/Iodine Sequential Catalysis
An one-pot organo- and iodine sequential catalysis strategy for reactions of amides with pyrazole-based primaryamines was described to synthesize chiral α-amino amides with a quaternary stereocenter. This methodology exhibited strong asymmetric induction, resulting in a typical enantiomeric excess value exceeding 99% and diastereoselectivity up to >99:1 dr. Moreover, the reaction was conducted without