1. Catalytic Enantioselective Synthesis of Inherently Chiral Calix[4]arenes via Sequential Povarov Reaction and Aromatizations.
- Author
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Yu, Shaoze, Yuan, Mengyao, Xie, Wansen, Ye, Zidan, Qin, Tianren, Yu, Na, and Yang, Xiaoyu
- Subjects
BIOCHEMICAL substrates ,AROMATIC compounds ,AROMATIZATION ,ALDEHYDES ,CHIRALITY - Abstract
Inherently chiral calix[4]arenes represent a unique type of chiral molecules with significant applications, yet their catalytic enantioselective synthesis remains largely underexplored. We report herein the catalytic enantioselective synthesis of inherently chiral calix[4]arenes through the sequential organocatalyzed enantioselective Povarov reaction and aromatizations. The chiral phosphoric acid catalyzed three‐component Povarov reaction involving amino group‐substituted calix[4]arenes, aldehydes and (di)enamides desymmetrized the prochiral calix[4]arene substrates, which was followed by various aromatization methods, resulting in a diverse array of novel quinoline‐containing calix[4]arenes with good yields and high enantioselectivities (up to 75 % yield, 99 % ee). The large‐scale enantioselective synthesis and diverse derivatizations of the chiral calix[4]arene products highlight the value of this method. Furthermore, preliminary exploration into their photophysical and chiroptical properties demonstrate the potential applications of these novel calix[4]arene molecules. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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