A synthesis of quinoline-5,8-quinones via the benzannulation of 1,4-dihydro-2-pyridyl carbene complexes
作者:Glen A. Peterson、William D. Wulff
DOI:10.1016/s0040-4039(97)01264-1
日期:1997.8
A method for the preparation of quinoline-5,8-quinones is described with the key step the benzannulation of a dihydropyridyl Fischer carbene complex. The carbene complexes are generated by the standard Fischer method upon metallation of N-Boc protected 1,4-dihydropyridines and their reactions with alkynes to provide 1,4-dihydroquinolines. The latter are converted to quinoline,5,8-quinones by a two-step
描述了一种制备喹啉5,8-醌的方法,其中关键步骤是二氢吡啶基菲舍尔卡宾配合物的苯并环化。卡宾配合物是在N-Boc保护的1,4-二氢吡啶及其与炔烃反应生成1,4-二氢喹啉后,通过标准的Fischer方法生成的。后者通过硝酸铈铵和三氟四氟硼酸的两步氧化过程转化为喹啉,5,8-醌。