Ethyl N-(<i>o</i>-Ethynyl)malonanilide as a Useful Building Block for the Preparation of 3,4-Disubstituted-2(1<i>H</i>)-quinolones, 3,4-Disubstituted- and 2,3,4-Trisubstituted Quinolines
作者:Antonio Arcadi、Sandro Cacchi、Giancarlo Fabrizi、Fedele Manna、Paola Pace
DOI:10.1055/s-1998-1656
日期:1998.4
3,4-Disubstituted-2(1H)-quinolones have been prepared through a procedure based on the palladium-catalysed reaction of the readily available ethyl-N-(o-ethynyl)malonanilide with aryl, heteroaryl and vinyl halides or vinyl triflates followed by the cyclization of the resulting coupling derivatives under basic conditions. It is shown that 3,4-disubstituted-2(1H)-quinolones are useful synthetic intermediates for the preparation of 3,4-disubstituted- and 2,3,4-trisubstituted quinolines.
3,4-二取代的2(1H)-喹诺酮是通过一种基于钯催化的反应过程制备的,该反应利用了易于获得的乙基-N-(邻乙炔基)丙二酰胺与芳基、杂芳基和乙烯基卤化物或乙烯基三氟磺酸盐反应,然后在碱性条件下对生成的偶联衍生物进行环化。研究表明,3,4-二取代的2(1H)-喹诺酮是制备3,4-二取代和2,3,4-三取代喹啉的有用合成中间体。