Highly Effective Regioselective Method for the Synthesis of Substituted Coumarin- and Quinolone-Annulated Heterocycles Using a Palladium(0)-Catalyzed Reaction
作者:K. Majumdar、A. Pal、A. Taher、P. Debnath
DOI:10.1055/s-2007-966052
日期:2007.6
The preparation of a variety of tetracyclic ring systems by palladium(0)-catalyzed cyclization of 2-bromobenzyloxy-substituted coumarins and quinolones is described. The process has been found to be a viable method for regioselective synthesis of the corresponding products in very good to excellent yield.
Regioselective Synthesis of Coumarin and Quinolone‐Annulated Spiro Heterocycles via Aryl Radical Cyclization
作者:K. C. Majumdar、P. P. Mukhopadhyay、P. K. Basu
DOI:10.1081/scc-200057236
日期:2005.5.1
Abstract 3‐(2′‐Bromobenzyloxy)quinolin‐2‐ones and 3‐(2′‐bromobenzyloxy)benzopyran‐7‐ones undergo aryl radical cyclization in the presence of n Bu3SnCl‐Na(CN)BH3‐AIBN to give spiro‐quinolone and coumarin derivatives.
摘要 3-(2'-Bromobenzyloxy)quinolin-2-ones 和 3-(2'-bromobenzyloxy)benzopyran-7-ones 在 n Bu3SnCl-Na(CN)BH3-AIBN 存在下进行芳基环化得到螺-喹诺酮和香豆素衍生物。