A new iodoarene catalyst with C1 symmetry was developed for enantioselective oxidative transformations. Notably, in the α-tosyloxylation of ketones, the catalyst delivered up to 85% yield and 75% ee. Comparative studies showed superior selectivity over analogs with C2 symmetry, which yielded racemic products. Density function theory (DFT) studies revealed a key stereodetermining complex in the reaction mechanism, supporting the origin of the enantioselectivity. The broad substrate scope demonstrates the versatility of the catalyst. These results emphasize the value of the C1-symmetric design for chiral hypervalent iodine catalysis.
Pavankumar et al. (Sun,) studied this question.
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