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
Catalyst and additive free 6-endo-dig cyclization of ortho-alkynylarylaldimines in water: An environmentally friendly access to isoquinolines
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DOI: 10.1016/j.tetlet.2019.151454
Abstract: Abstract A novel and sustainable route for the synthesis of isoquinoline was developed by reacting 2-ethynylbenzaldehyde with ammonium hydroxide in water. This method provides a convenient, atom-economical, and catalyst-free access to diversely substituted isoquinolines with… read more here.
Keywords: additive free; catalyst additive; water; free endo ... See more keywords
Aerobic conversion of benzylic sp3 C–H in diphenylmethanes and benzyl ethers to CO bonds under catalyst-, additive- and light-free conditions
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DOI: 10.1039/c9qo00004f
Abstract: Catalyst-, additive- and light-free aerobic conversion of benzylic C–H to CO bonds is, for the first time, reported. read more here.
Keywords: additive light; light free; aerobic conversion; catalyst additive ... See more keywords
Catalyst and additive-free oxidative dual C-H sulfenylation of imidazoheterocycles with elemental sulfur using DMSO as a solvent and an oxidant.
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DOI: 10.1039/d0cc00043d
Abstract: Dual C-H sulfenylation was used to obtain 3-vulcanized imidazoheterocycles using odorless elemental sulfur under catalyst- and additive-free conditions. C-H activation of both imidazoheterocycles and arylamines/arenols/indoles was realized by a practical protocol in which DMSO served… read more here.
Keywords: additive free; catalyst additive; free oxidative; elemental sulfur ... See more keywords
Catalyst- and additive-free syntheses of rhodanine and S-alkyl dithiocarbamate derivatives from sulfoxonium ylides.
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DOI: 10.1039/d2cc06092b
Abstract: An efficient catalyst- and additive-free facile access to rhodanine and S-alkyl dithiocarbamate derivatives via multi-component reaction of amines, CS2 and α-ester sulfoxonium ylides in methanol has been described. The new synthetic methods offer excellent synthetic… read more here.
Keywords: dithiocarbamate derivatives; alkyl dithiocarbamate; additive free; rhodanine alkyl ... See more keywords