Journal
ORGANIC LETTERS
Volume 23, Issue 20, Pages 7933-7937Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.orglett.1c02931
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Funding
- National Natural Science Foundation of China (NSFC) [21971003, 22001007]
- Anhui Provincial Natural Science Foundation [2008085J07]
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In this study, Hantzsch esters (HEs) were used as two-carbon partners in a copper(I)-catalyzed enantioselective [3 + 2] annulation with racemic 2-(hetero)aryl-N-sulfonyl aziridines via kinetic resolution to provide pyrrolo[2,3-b]tetrahydropyridines containing multiple contiguous stereogenic centers. The reactions yielded products with excellent yields and enantiopurities, as well as moderate-to-excellent diastereoselectivities. Depending on the structures of the aziridines, a competitive hydrogenolysis process with HEs as the hydrogen source was also observed in some cases.
Hantzsch esters (HEs) served as two-carbon partners in a copper(I)-catalyzed enantioselective [3 + 2] annulation with racemic 2-(hetero)aryl-N-sulfonyl aziridines via kinetic resolution to provide pyrrolo[2,3-b]tetrahydropyridines containing multiple contiguous stereogenic centers including all-carbon quaternary centers in excellent yields and enantiopurities and moderate-to-excellent diastereoselectivities. Mainly dependent upon the structures of the aziridines, a competitive hydrogenolysis process with HEs as the hydrogen source was also observed in some cases.
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