Synthesis of Isoquinolines Bearing Differentially Functionalized Nitrogen Substituents at Positions 3 and 4 through Amine Displacement on a 4-Nitro-3-(p-toluenesulfonyloxy)isoquinoline
作者:Jeffery S. Hinkle、O.William Lever
DOI:10.1016/s0040-4020(01)85974-3
日期:1988.1
positions 3 and 4 is described. The method involves tosylarion of a 3-hydroxy-4-nitroisoquinoline and subsequent tosylate displacement by amine nucleophiles to give 3-amino-4-nitroisoquinolinc derivatives, the products of specific C-O bond cleavage. Reduction of the 4-nitro group and elaboration of the resulting 4-amino moiety provides the differentiated 3- and 4-amino functions, not readily available by other
描述了合成在位置3和4被差异化的氮取代基官能化的异喹啉的方法。该方法包括3-羟基-4-硝基异喹啉的甲苯磺酰化和随后被胺亲核试剂取代甲苯磺酸酯以产生3-氨基-4-硝基异喹啉的衍生物,其为特异性CO键裂解的产物。4-硝基的还原和所得4-氨基部分的修饰提供了区别的3-和4-氨基功能,这是其他方法不易获得的。适当取代的化合物适合进一步转化,如其转化为咪唑并[5,4-c]异喹啉衍生物所示。有关甲苯磺酰脲置换的其他研究表明,通过裂解也可以发生硫醇置换。一氧化碳产生3-硫醚衍生物,