Catalytic Asymmetric Synthesis of Chiral Dihydrobenzofurans through a Formal [4+1] Annulation Reaction of Sulfur Ylides and In Situ Generated ortho‐Quinone Methides
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DOI: 10.1002/ejoc.201601186
Abstract: The first example of a catalytic asymmetric formal [4+1] annulation reaction between sulfur ylides and in situ generated ortho-quinone methides (o-QMs) is reported in this work. A C2-symmetric chiral urea was identified to be the… read more here.
Keywords: sulfur ylides; reaction sulfur; formal annulation; catalytic asymmetric ... See more keywords
Two Catalytic Annulation Modes via Cu-Allenylidenes with Sulfur Ylides that Are Dominated by the Presence or Absence of Trifluoromethyl Substituents
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DOI: 10.1016/j.isci.2020.100994
Abstract: Summary We disclose the Cu-catalyzed enantioselective synthesis of 3-methyl-3-propargyl-indolines, which contain a quaternary stereogenic carbon center, via the decarboxylative [4 + 1] annulation of 4-methyl-4-propargyl-benzoxazinanones with variety of sulfur ylides. The reaction proceeds predominantly through… read more here.
Keywords: annulation; allenylidene intermediates; sulfur ylides; attack allenylidene ... See more keywords
Metal-Free [5 + 1] Cycloaddition-Aromatization of Benzotriazoles and Sulfur Ylides to Construct 1,2,4-Benzotriazines.
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DOI: 10.1021/acs.orglett.2c02064
Abstract: Reported herein is a novel [5 + 1] cycloaddition-aromatization of benzotriazoles and sulfur ylides to efficiently construct 1,2,4-benzotriazine derivates with good yield. This new protocol does not employ any transition metal reagent and enables the… read more here.
Keywords: aromatization benzotriazoles; metal free; benzotriazoles sulfur; sulfur ylides ... See more keywords
Rhodium-Catalyzed Synthesis of Sulfur Ylides via in Situ Generated Iodonium Ylides.
Sign Up to like & getrecommendations! Published in 2017 at "Organic letters"
DOI: 10.1021/acs.orglett.7b03413
Abstract: A convenient strategy for the synthesis of sulfur ylides via rhodium-catalyzed coupling of in situ generated iodonium ylides with sulfides or sulfoxides has been developed. A wide range of sulfur ylides were obtained in moderate… read more here.
Keywords: ylides via; sulfur ylides; rhodium catalyzed; synthesis sulfur ... See more keywords
Application of Sulfur Ylides in 1,2-Difunctionalization of Arynes via Insertion into a C-S σ-Bond.
Sign Up to like & getrecommendations! Published in 2018 at "Organic letters"
DOI: 10.1021/acs.orglett.7b04003
Abstract: A novel reactivity of sulfur ylides has been demonstrated in a transition-metal-free protocol to access ortho-substituted thioanisole derivatives by insertion of arynes into a C-S σ-bond in moderate to good yields. The reaction involves the… read more here.
Keywords: application sulfur; ylides difunctionalization; sulfur ylides; insertion ... See more keywords
A facile and efficient [4 + 2] annulation reaction of sulfur ylides: access to N-fused benzimidazoles
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DOI: 10.1039/c8qo01133h
Abstract: The synthesis of N-fused benzimidazoles via sulfur ylides is first reported. The reaction system is facile and mild without a metal catalyst. read more here.
Keywords: facile efficient; sulfur ylides; reaction; efficient annulation ... See more keywords
Efficient Synthesis of 4,7-Dihydro-1H-oxepino[2,3-c]pyrazoles by Potassium Carbonate Promoted [4+3] Annulation of Crotonate-Derived Sulfur Ylides with Benzylidenepyrazolones
Sign Up to like & getrecommendations! Published in 2019 at "Synthesis"
DOI: 10.1055/s-0037-1610693
Abstract: The [4+3] annulation reaction of crotonate-derived sulfur ylides with benzylidenepyrazolones using K2CO3 as the base is reported. The ready availability of starting materials and the simple cyclization procedure make this approach suitable for the preparation… read more here.
Keywords: ylides benzylidenepyrazolones; sulfur ylides; crotonate derived; derived sulfur ... See more keywords
Organocatalytic Transformations from Sulfur Ylides
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DOI: 10.3390/catal13040689
Abstract: Sulfur ylides are an important class of organic compounds due to their ability to perform many different transformations that can give diverse and interesting products with a high degree of complexity. Although metal-catalyzed transformations are… read more here.
Keywords: transformations sulfur; organocatalytic transformations; sulfur ylides;