Palladium‐catalyzed [4 + 2] cycloaddition of sulfamate‐derived cyclic imines with γ‐methylidene‐δ‐valerolactones/2‐methylidenetrimethylene carbonate
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DOI: 10.1002/jhet.4821
Abstract: A general and useful palladium‐catalyzed [4 + 2] cycloaddition of sulfamate‐derived cyclic imines with γ‐methylidene‐δ‐valerolactones (or 2‐methylidenetrimethylene carbonate) is described. The developed strategy generated diverse sulfamate‐fused piperidine derivatives (or sulfamate‐fused 1,3‐oxazinane rings) in good yields. read more here.
Keywords: sulfamate derived; cycloaddition sulfamate; palladium catalyzed; derived cyclic ... See more keywords
Difunctionalization of Sulfamate-Derived Cyclic Imines through Phosphine Catalysis.
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DOI: 10.1021/acs.orglett.5c01703
Abstract: With the use of alkynyl 1,2-diones as phosphine acceptors and H2O as a reaction partner, an unprecedented phosphine-catalyzed three-component difunctionalization of sulfamate-derived cyclic imines was achieved, providing a wide range of highly functionalized cyclic sulfonamide… read more here.
Keywords: derived cyclic; sulfamate derived; imines phosphine; difunctionalization sulfamate ... See more keywords
Phosphine-Catalyzed [4 + 2] Annulation of Allenoate with Sulfamate-Derived Cyclic Imines: A Reaction Mode Involving γ'-Carbon of α-Substituted Allenoate.
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DOI: 10.1021/acs.orglett.7b03175
Abstract: A phosphine-catalyzed [4 + 2] cycloaddition of cyclic α-substituted allenoates with sulfamate-derived cyclic imines has been reported. Using dibenzylphenylphosphine as the nucleophilic catalyst, the reaction worked efficiently to yield various fused multicyclic heterocyclic compounds in… read more here.
Keywords: phosphine catalyzed; reaction mode; cyclic imines; reaction ... See more keywords
Annulation Reactions of Isoquinolinium Ylides with Sulfamate-Derived Cyclic Imines toward Polycyclic 1,3-Benzoxazepine Heterocycles
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DOI: 10.1055/a-2349-6944
Abstract: A dearomatization-guided and (3+2) cycloaddition-triggered annulation reaction of in situ formed isoquinolinium ylides with sulfamate-derived cyclic imines is reported, offering a cogent synthesis of tetracyclic 1,3-benzoxazepine frameworks in high yields. The protocol features successive ring-forming… read more here.
Keywords: isoquinolinium ylides; derived cyclic; sulfamate derived; benzoxazepine ... See more keywords