Diels-Alder Reactions of Nitro-2(1H)-pyridones with 2,3-Dimethyl-1,3-butadiene.
作者:Reiko FUJITA、Kazuhiro WATANABE、Yasuhiro NISHIUCHI、Rumiko HONDA、Hisao MATSUZAKI、Hiroshi HONGO
DOI:10.1248/cpb.49.601
日期:——
Diels-Alder (DA) reactions of 3- or 5-nitro-2(1H)-pyridones and nitro-2(1H)-pyridones containing a methoxycarbonyl group with 2,3-dimethyl-1,3-butadiene were examined. The DA reactions of 3-nitro-2(1H)-pyridones in this paper represent, to the best of our knowledge, the first report of DA reactions of 3-substituted 2(1H)-pyridones and consequent production of isoquinolones. Performing the same reactions
考察了3-或5-硝基-2(1H)-吡啶酮和含有甲氧基羰基的硝基-2(1H)-吡啶酮与2,3-二甲基-1,3-丁二烯的狄尔斯-阿尔德(DA)反应。就我们所知,本文中的3-硝基-2(1H)-吡啶酮的DA反应代表了关于3-取代的2(1H)-吡啶酮的DA反应以及由此产生的异喹诺酮的第一个报道。用5-硝基-2(1H)-吡啶酮进行相同的反应得到喹诺酮。2(1H)-吡啶酮与硝基和甲氧羰基的DA反应产生异喹诺酮,喹诺酮和菲啶酮(双DA加合物),被芳构化或氢化。通过使用从头算MO方法计算活化能来评估取代基效果。