The palladium-catalyzed coupling of aryl and vinyl halides with vinylic compounds is disclosed. A preferred embodiment relating to the palladium catalyzed coupling of 4-substituted and 6-substituted-2-methoxynaphthalene to form nabumetone is also disclosed. The beauty of this novel reaction is that methylvinylketone, normally employed by the art directly as-is for the preparation of nabumetone, is formed in situ. We have discovered a mechanism to take advantage of the in situ formation of methylvinylketone, thus avoiding the use of expensive, toxic, and unstable methyl vinyl ketone feed. This reaction may be employed for a variety of pharmaceutically active and non-pharmaceutical compounds.
公开了
钯催化芳基和
乙烯基卤化物与
乙烯基化合物的偶联。本发明还公开了一个优选的实施方案,涉及 4-取代和 6-取代-2-甲氧基
萘在
钯催化下偶联生成
萘酮。这种新型反应的美妙之处在于,在制备
萘丁美酮时通常直接使用的
甲基乙烯酮在原位形成。我们发现了一种利用甲基
乙烯基酮原位形成的机制,从而避免了使用昂贵、有毒和不稳定的甲基
乙烯基酮原料。这种反应可用于多种具有医药活性的化合物和非医药化合物。