Asymmetric counteranion-directed photoredox catalysis
| العنوان: | Asymmetric counteranion-directed photoredox catalysis |
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| المؤلفون: | Sayantani Das, Chendan Zhu, Derya Demirbas, Eckhard Bill, Chandra Kanta De, Benjamin List |
| المصدر: | Science. 379:494-499 |
| بيانات النشر: | American Association for the Advancement of Science (AAAS), 2023. |
| سنة النشر: | 2023 |
| مصطلحات موضوعية: | Multidisciplinary |
| الوصف: | Photoredox catalysis enables distinctive and broadly applicable chemical reactions, but controlling their selectivity has proven to be difficult. The pursuit of enantioselectivity is a particularly daunting challenge, arguably because of the high energy of the activated radical (ion) intermediates, and previous approaches have invariably required pairing of the photoredox catalytic cycle with an additional activation mode for asymmetric induction. A potential solution for photoredox reactions proceeding via radical ions would be catalytic pairing with enantiopure counterions. However, although attempts toward this approach have been described, high selectivity has not yet been accomplished. Here we report a potentially general solution to radical cation–based asymmetric photoredox catalysis. We describe organic salts, featuring confined imidodiphosphorimidate counteranions that catalyze highly enantioselective [2+2]-cross cycloadditions of styrenes. |
| تدمد: | 1095-9203 0036-8075 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::8f4e29bc8a11f4b2de472910107a4014 https://doi.org/10.1126/science.ade8190 |
| رقم الأكسشن: | edsair.doi...........8f4e29bc8a11f4b2de472910107a4014 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 10959203 00368075 |
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