Catalyst- and additive-free selective sulfonylation/cyclization of 1,6-enynes with arylazo sulfones leading to sulfonylated γ-butyrolactams
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DOI: 10.1016/j.cclet.2020.11.059
Abstract: Abstract A convenient and regioselective sulfonylation/cyclization of 1,6-enynes with arylazo sulfones has been developed to access a series of sulfonylated γ-butyrolactams. The present reaction could be efficiently conducted under catalyst- and additive-free conditions, in which… read more here.
Keywords: catalyst additive; enynes arylazo; cyclization enynes; sulfonylated butyrolactams ... See more keywords
Visible-light-initiated regioselective sulfonylation/cyclization of 1,6-enynes under photocatalyst- and additive-free conditions
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DOI: 10.1039/c9gc03769a
Abstract: Without employing any photocatalyst and additive, an economical, eco-friendly and practical strategy has been developed for the visible-light-initiated regioselective sulfonylation/cyclization of 1,6-enynes in a biomass-derived green solvent 2-methylTHF from easily accessible sulfonyl chlorides under open-air… read more here.
Keywords: photocatalyst additive; visible light; regioselective sulfonylation; initiated regioselective ... See more keywords
Visible-Light-Mediated Tandem Sulfonylation/Cyclization of Vinyl Azides with Sulfonyl Hydrazines for the Synthesis of 6-(Sulfonylmethyl)phenanthridines under Mild Conditions
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DOI: 10.1055/s-0037-1611758
Abstract: A visible-light-mediated tandem sulfonylation/cyclization of vinyl azides with sulfonyl hydrazines was developed that provides an efficient and simple strategy for the synthesis of valuable 6-(sulfonylmethyl)phenanthridines with a broad substrate scope and satisfactory yields under mild… read more here.
Keywords: sulfonylation cyclization; visible light; cyclization vinyl; mediated tandem ... See more keywords
Visible Light-Induced Cascade Sulfonylation/Cyclization to Produce Quinoline-2,4-Diones under Metal-Free Conditions
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DOI: 10.3390/molecules28073137
Abstract: A general visible light-induced sulfonylation/cyclization to produce quinoline-2,4-diones was achieved under photocatalyst-free conditions. The reactions were performed at room temperature, and various substituents (halogen, alkyl, aryl) and substituted products were obtained with 29 examples within… read more here.
Keywords: light induced; sulfonylation cyclization; produce quinoline; quinoline diones ... See more keywords