An efficient transformation towards propynoates and propynenitriles is herein described. The practical methodology was conducted at low temperature (–78 or –60 °C) in a one-pot manner with the assistance of base rather than any transition metal catalysts. The base-induced protocol exhibits good functional group tolerance (up to 28 examples) and high efficiency (up to 92% yields) towards substituted acetylenes of great synthetic significance, which was also well demonstrated by the gram-scale reactions.
本文描述了一种高效的转化方法,用于合成丙炔酸酯和丙炔腈。该实用方法在低温(–78或–60°C)下以一锅法进行,辅以碱而非任何过渡金属催化剂。碱诱导的方案对功能团的容忍性良好(达到28个例子),对具有重要合成意义的取代乙炔具有高效率(最高可达92%收率),这也得到了克拉姆级反应的良好证明。