Rh-Catalyzed C–H Amination/Annulation of Acrylic Acids and Anthranils by Using −COOH as a Deciduous Directing Group: An Access to Diverse Quinolines
作者:Yang Gao、Jianhong Nie、Yibiao Li、Xianwei Li、Qian Chen、Yanping Huo、Xiao-Qiang Hu
DOI:10.1021/acs.orglett.0c00539
日期:2020.4.3
A method for the synthesis of diverse polysubstituted quinolines from readily available acrylic acids and anthranils has been developed. The weakly coordinating –COOH directing group, which can be tracelessly removed in the cascadecyclization, is essential for this reaction. Diverse polysubstituted quinolines were obtained under mild reaction conditions with simple H2O and CO2 as byproducts. More
metal-free protocol for the synthesis of indenoquinolinones and 2-substituted quinolinesvia [4 + 2] cycloaddition reaction using readily available 2-aminobenzaldehydes and ketones as starting materials. Different quinoline derivatives can be selectively synthesized by changing the type of ketones. O2 and dimethyl sulfoxide (DMSO) as co-oxidants play an important role in the synthesis of indenoquinolinones
A one-pot synthesis for the preparation of 1,2,3,4-tetrahydroacridines involving a Zr(IV)-catalyzed Mannich reaction of o-azidobenzaldehydes and arylamines with cycloketones, followed by aza-Witting cyclization and deaminative aromatization, is developed. This method can be extended for the synthesis of cyclohepta[b]quinolines.
开发了用于制备 1,2,3,4-四氢吖啶的一锅法合成,涉及 Zr( IV ) 催化的邻叠氮基苯甲醛和芳基胺与环酮的曼尼希反应,然后是氮杂维廷环化和脱氨基芳构化。该方法可推广用于环庚[ b ]喹啉的合成。