通过无配体铜催化的β-卤代戊基/芳基三组分反应,高收率合成了多种3-取代的异喹啉,甾族吡啶,5,6-二氢苯并[ f ]异喹啉和1,6-萘吡啶微波辐射下,DMF中的乙醛,芳族/脂肪族末端炔烃和叔丁胺/苯甲m 微波辐射下邻炔基芳基/乙烯基醛与苯甲idine的无催化剂反应也以优异的产率提供了3-取代的异喹啉和取代的吡啶衍生物。
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.
An efficient synthetic protocol of pyrroles and isoquinolines through NaN3/NH4Cl promoted intramolecular aza-annulation of formyl group with suitable alkenes or alkynes is described in high yield and regioselectivities. The metal free exo-trig and endo-dig aza-cyclisation has been extended for the synthesis of bicyclic or tricyclic pyrroles along with environment sensitive fluorescent isoquinoline
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。