Microwave‐Assisted Dieckmann Reaction: Efficient One‐Step Synthesis of 2‐Aroylbenzofuran‐3‐ols
摘要:
AbstractThis paper describes the first efficient one‐step synthesis of 2‐aroylbenzofuran‐3‐ols from the microwave‐assisted Dieckmann reaction of substituted methylsalicylates with 2‐bromo‐1‐aroylethanones in alkaline aprotic solvents. This method features excellent yields, short reaction time (15 min) and high functional group compatibility, making it an efficient and practical approach for the synthesis of 2‐aroylbenzofuran‐3‐ols.
Asymmetric Michael-Aldol Tandem Reaction of 2-Substituted Benzofuran-3-ones and Enones: A Facile Synthesis of Griseofulvin Analogues
作者:Nan Dong、Xin Li、Feng Wang、Jin-Pei Cheng
DOI:10.1021/ol402346c
日期:2013.9.20
A highly enantioselectiveMichael–aldoltandem reaction with respect to prochiral 2-substituted benzofuran-3-ones and enones by a facile primary amine catalyst was investigated. The approach provides rapid access to the desired pharmaceutically active griseofulvin analogues.