Substituent-Guided Switch between CH Activation and Decarboxylative Cross-Coupling during Palladium/Copper-Catalyzed Cascade Reactions of 2-Aminobenzoates with 2-Haloarylaldehydes
作者:Subhendu Bhowmik、Garima Pandey、Sanjay Batra
DOI:10.1002/chem.201301705
日期:2013.8.5
Phenanthridines, pyrazole[4,3‐c]quinolines and isocryptolepine were prepared in one step from the Pd/Cu‐catalyzed reaction between potassium 2‐aminobenzoates and 2‐haloarylaldehydes (see scheme). Although the reactions of 2‐aminobenzoates proceeded via a cascade imination/CH functionalization, the reactions of 6‐nitro‐2‐aminobenzoates ensued via a tandem imination/decarboxylative cross‐coupling.
级联转换:由2-氨基苯甲酸钾和2-卤代芳基醛之间的Pd / Cu催化反应一步制得菲啶,吡唑[4,3- c ]喹啉和异隐油菜碱(参见方案)。虽然经由级联亚胺化/ C进行2-氨基苯甲酸酯反应 ħ官能化,6-硝基-2-氨基苯甲酸酯的反应中通过串联亚胺化/脱羧交叉偶联接踵而至。