Synthesis and Utilization of Nitroalkyne Equivalents in Batch and Continuous Flow
作者:Peter D. Morse、Timothy F. Jamison
DOI:10.1002/anie.201706157
日期:2017.11.6
reactivity of these silyltriflates, which are prepared in situ, is exemplified by dipolar cycloaddition reactions with nitrones to give highly substituted 4-nitro-4-isoxazolines in high yields. This approach has proven general for several different alkyl and aryl substituted alkynes. In order to minimize the accumulation of potentially hazardous reaction intermediates, we have also developed a continuous
我们报告了一种方法,通过硝化乙烯基三氟甲磺酸乙烯酯的等效物来克服硝基炔烃的低稳定性。由于它们的不稳定性,硝基炔烃仅很少用于合成中。这些原位制备的甲硅烷基三氟甲磺酸酯的反应性可通过与硝酮的偶极环加成反应来举例说明,以高收率得到高度取代的4-硝基-4-异恶唑啉。对于几种不同的烷基和芳基取代的炔烃,该方法已被证明是通用的。为了最大程度地减少潜在危险的反应中间体的积累,我们还开发了这种方法的连续流变体,该变体能够以高收率和较短的停留时间进行整个反应过程。