Reaction rate differences between organotrifluoroborates and boronic acids in BINOL-catalyzed conjugate addition to enones
作者:Bailey Brooks、Noemi Hiller、Jeremy A. May
DOI:10.1016/j.tetlet.2021.153412
日期:2021.10
has been successfully employed in combination with trifluoroborate reagents for novel organic transformations over the last decade. However, no experimental rate studies of these reactions have been reported. Herein we report Hammett plot analysis of the organocatalyzed enantioselective conjugate addition of alkenyl, aryl, and heteroaryl trifluoroborate salts to chalcone derivatives with substitution
在过去的十年中,对映选择性有机催化已成功与三氟硼酸盐试剂结合用于新型有机转化。然而,没有报道这些反应的实验速率研究。在此,我们报告了有机催化的烯基、芳基和杂芳基三氟硼酸盐与查耳酮衍生物的对映选择性共轭加成的哈米特图分析,在 β-芳基和酮基-芳基位置均被取代。酮芳基取代的速率趋势与硼酸亲核试剂的速率趋势不同,因为三氟硼酸盐的酮芳基取代基不会以与电荷稳定一致的方式显着影响反应速率。此外,