Synthese und Eigenschaften von<i>o</i>-hydroxyphenyl- und<i>o</i>-acetylaminophenyl-substituierten Cyclopropenonen. Eine neuartige thermische Umwandlung funktionalisierter Diarylcyclopropenone
作者:Theophil Eicher、Volker Schneider
DOI:10.1055/s-1989-27255
日期:——
Synthesis and Properties of o-Hydroxyphenyl- and o-Acetylaminophenyl-Substituted Cyclopropenones. A Novel Thermal Transformation of Functionalized Cyclopropenones The ortho-functionalized arylphenylcyclopropenones 3 are prepared via the West method and their spectroscopic and chemical properties are reported. The cyclopropenones 3 undergo thermal transformation to give heterocycles 7, 8, 12, photochemically they are decarbonylated to give alkynes 9 as main products. The structures of the heterocycles 7, 8, 12 are proven by means of spectroscopic data and by independent synthesis. A mechanism for this novel thermal cyclopropenone transformation is discussed.
o-羟基苯基和o-乙酰氨基苯基取代的环丙烯酮的合成及性质。功能化环丙烯酮的新型热转化。通过West方法合成了o-功能化芳香环丙烯酮3,并报道了其光谱及化学性质。环丙烯酮3经过热转化生成杂环化合物7、8和12,经过光化学反应则脱羧基生成炔烃9为主要产物。这些杂环化合物7、8和12的结构通过光谱数据和独立合成得到了证实。讨论了这一新型热环丙烯酮转化的机制。