A catalyst don`t appear in the overall stoichiometry of the reaction it catalyzes, but it must appear in at least one of the elementary reactions in the mechanism for the catalyzed reaction. Related Products of 51673-83-7Related Products of 51673-83-7, , Name is Tetrahydro-2H-pyran-2-carboxylic acid, molecular formula is C6H10O3. In a patent, introducing its new discovery.
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：
Tetrahydropyran – Wikipedia,
Tetrahydropyran – an overview | ScienceDirect Topics