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Intramolecular ring-opening from a CO2-derived nucleophile as the origin of selectivity for 5-substituted oxazolidinone from the (salen)Cr-catalyzed [aziridine + CO2] coupling.

ABSTRACT: The (salen)Cr-catalyzed [aziridine + CO2] coupling to form oxazolidinone was found to exhibit excellent selectivity for the 5-substituted oxazolidinone product in the absence of any cocatalyst. Quantum mechanical calculations suggest that the preferential opening of the substituted C-N bond of the aziridine over the unsubstituted C-N bond is a key factor for this selectivity, a result that is supported by experiment with several phenyl-substituted aziridines. In the presence of external nucleophile such as dimethyl aminopyridine (DMAP), the reaction changes pathway and the ring-opening process is regulated by the steric demand of the nucleophile.

SUBMITTER: Adhikari D

PROVIDER: S-EPMC5811137 | biostudies-literature | 2015 Feb

REPOSITORIES: biostudies-literature

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Intramolecular ring-opening from a CO2-derived nucleophile as the origin of selectivity for 5-substituted oxazolidinone from the (salen)Cr-catalyzed [aziridine + CO2] coupling.

Adhikari Debashis D Miller Aaron W AW Baik Mu-Hyun MH Nguyen SonBinh T ST

Chemical science 20141121 2

The (salen)Cr-catalyzed [aziridine + CO2] coupling to form oxazolidinone was found to exhibit excellent selectivity for the 5-substituted oxazolidinone product in the absence of any cocatalyst. Quantum mechanical calculations suggest that the preferential opening of the substituted C-N bond of the aziridine over the unsubstituted C-N bond is a key factor for this selectivity, a result that is supported by experiment with several phenyl-substituted aziridines. In the presence of extern ...[more]

PMID: 29560215

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