One-pot synthesis of isoquinoline and related compounds via Cu-mediated tandem cross-coupling and cyclization
作者:Shubhendu Dhara、Raju Singha、Yasin Nuree、Jayanta K. Ray
DOI:10.1016/j.tetlet.2013.11.088
日期:2014.1
One-pot synthetic strategy has been developed to access isoquinolines and its analogs via Cu-mediated tandem cross-coupling and cyclization in good yields under mild reaction conditions. A mixture of suitably substituted α-bromoaldehyde, terminal alkyne, and aq NH3 in CuI/1,10-phenanathroline catalytic system afforded the 3-substituted isoquinoline regio-selectively in good to excellent yields.
A concise and efficient synthesis of fused isoquinolines has been established by using an environmentally friendly neat approach. In this method, the electrocyclic reaction is emphasized over the typical aza-Michael addition. This green methodology allows the synthesis of various isoquinolines, including the alkaloid decumbenine B and a fluorophore that selectively detects picric acid.
通过使用环境友好的纯净方法,建立了稠合异喹啉的简洁有效的合成方法。在该方法中,电环反应比典型的氮杂迈克尔加成更重要。这种绿色方法可以合成各种异喹啉,包括生物碱 decumbenine B 和选择性检测苦味酸的荧光团。