Catalytic Asymmetric [3 + 2] Annulation of Hantzsch Esters with Racemic N-Sulfonylaziridines.
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DOI: 10.1021/acs.orglett.1c02931
Abstract: 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… read more here.
Keywords: annulation hantzsch; asymmetric annulation; hantzsch esters; hantzsch ... See more keywords
Photoredox-catalyzed hydrosulfonylation reaction of electron-deficient alkenes with substituted Hantzsch esters and sulfur dioxide.
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DOI: 10.1039/c9cc03004b
Abstract: A sulfonylation reaction of 4-substituted Hantzsch esters, DABCO·(SO2)2, and electron-deficient alkenes at room temperature in the presence of photoredox catalysis under visible light irradiation is described. Not only (E)-chalcones but also (vinylsulfonyl)benzene and 2-vinylpyridine are… read more here.
Keywords: sulfur dioxide; deficient alkenes; substituted hantzsch; electron deficient ... See more keywords