A Novel Synthesis of Isoflavones via Copper(I)-Catalyzed Intramolecular Cyclization Reaction
作者:Qiu-Lian Li、Qi-Lun Liu、Zhi-Yuan Ge、Yong-Ming Zhu
DOI:10.1002/hlca.201000400
日期:2011.7
Isoflavone derivatives were synthesized via intramolecular cyclization of 3‐(2‐bromophenyl)‐3‐oxopropanal derivatives, using CuI as the catalyst, 2‐picolinic acid (=pyridine‐2‐carboxylic acid) as the ligand, K2CO3 as the base, and DMF as the solvent, in up to 96% yield. The synthesis is functional group‐tolerant.
异黄酮衍生物是通过以CuI为催化剂,以2-吡啶甲酸(=吡啶-2-羧酸)为配体,以K 2 CO 3为催化剂,通过3-(2-溴苯基)-3-氧丙醛衍生物的分子内环化反应合成的。碱和DMF作为溶剂,产率高达96%。合成是官能团耐受的。