Electric Literature of 51673-83-7, Children learn through play, and they learn more than adults might expect. Science experiments are a great way to spark their curiosity, get their minds active, and encourage them to do something that doesn’t involve a screen. 51673-83-7, C6H10O3. A document type is Article, introducing its new discovery.
Conformational memory in enantioselective radical reductions and a new radical clock reaction
The radical decarboxylation of acid 1 led to tetrahydropyran 3 with significant optical activity. This transfer of chirality is an example of a conformational memory effect and derives from the slow ring inversion of the atropisomer 2 and its enantiomer 2′. A similar conformational memory effect was observed in the reductive decyanation and reductive lithiation of cyanohydrin 4. We propose that the racemization of radicals with chiral conformations such as 2 could be used as new radical clocks. The rate of racemization of 2 was evaluated and used to determine the rate of H atom transfer to 2 by different H atom donors. The rate of racemization of 2 is 5.7 x 108 s-1 at 22 C, which is about five times faster than ring opening of a cyclopropylmethyl radical.
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Reference£º
Tetrahydropyran – Wikipedia,
Tetrahydropyran – an overview | ScienceDirect Topics