作者:Otohiko Tsuge、Shuji Kanemasa、Tatsuya Otsuka、Toshiro Suzuki
DOI:10.1246/bcsj.61.2897
日期:1988.8
1-Alkenyl cyclopropyl ketones, when activated by cation-stabilizing substituents at the ring carbon or at the terminal carbon of the enone moiety, undergo polyphosphoric acid-catalyzed ring enlargement producing cyclopentanone or cyclohexenone derivatives. Similar acid-catalyzed ring opening of 1-alkenyl 2-phenoxycyclopropyl ketones offers a convenient and effective synthesis of 4-oxo-5-alkenals and
1-烯基环丙基酮,当被环碳或烯酮部分末端碳上的阳离子稳定取代基活化时,经历多磷酸催化的环扩大,产生环戊酮或环己烯酮衍生物。1-烯基 2-苯氧基环丙基酮的类似酸催化开环为 4-氧代-5-烯醛及其二氧戊环保护衍生物的合成提供了方便有效的方法。