ChemInform Abstract: Efficient Imidation of C(sp3)-H Bonds Adjacent to Oxygen Atoms of Aryl Ethers under Metal-Free Conditions.

ChemInform ◽  
2015 ◽  
Vol 46 (12) ◽  
pp. no-no
Author(s):  
Kai Sun ◽  
Xin Wang ◽  
Gang Li ◽  
Zhonghong Zhu ◽  
Yongqing Jiang ◽  
...  
Keyword(s):  
Metal Free ◽  
Aryl Ethers ◽  
Oxygen Atoms

Efficient imidation of C(sp3)–H bonds adjacent to oxygen atoms of aryl ethers under metal-free conditions

2014 ◽  
Vol 50 (85) ◽  
pp. 12880-12883 ◽  
Author(s):  
Kai Sun ◽  
Xin Wang ◽  
Gang Li ◽  
Zhonghong Zhu ◽  
Yongqing Jiang ◽  
...  
Keyword(s):  
Formation Reaction ◽  
Metal Free ◽  
Aryl Ethers ◽  
First Time ◽  
Oxygen Atoms

A metal-free intermolecular oxidative C–N formation reaction of aryl ethers with saccharins was realized for the first time.

A metal-free biaryl coupling reaction activated by a sulfonium salt

2018 ◽  
Vol 5 (22) ◽  
pp. 3219-3225 ◽  
Author(s):  
Kazuhiro Higuchi ◽  
Takuhiro Tago ◽  
Yusuke Kokubo ◽  
Motoki Ito ◽  
Masanori Tayu ◽  
...  
Keyword(s):  
Coupling Reaction ◽  
Sulfonium Salt ◽  
One Pot ◽  
Metal Free ◽  
Trifluoromethanesulfonic Anhydride ◽  
Biaryl Coupling ◽  
Aryl Ethers

A metal-free biaryl coupling reaction of phenol or aryl ethers mediated by a sulfonium salt formed from diphenyl sulfoxide and trifluoromethanesulfonic anhydride has been developed. The method is a rapid, one-pot reaction, leaving no traces of the sulfonium moiety in the product.

A cascade process for the synthesis of ortho-formyl allyl aryl ethers and 2H-chromen-2-ol derivatives from arynes via trapping of o-quinone methide with an activated alkene

2019 ◽  
Vol 17 (2) ◽  
pp. 333-346 ◽  
Author(s):  
Abhilash Sharma ◽  
Pranjal Gogoi
Keyword(s):  
Transition Metal ◽  
Direct Synthesis ◽  
Quinone Methide ◽  
Cascade Process ◽  
Metal Free ◽  
Synthetic Strategy ◽  
Aryl Ethers ◽  
Three Component Coupling

A transition-metal free synthetic strategy for the direct synthesis of ortho-formyl substituted allyl aryl ethers and 2H-chromen-2-ol derivatives via a cascade three-component coupling of arynes, activated alkene and N,N-dimethylformamide.

scholarly journals Metal-Free Synthesis of Aryl Ethers in Water

2013 ◽  
Vol 15 (23) ◽  
pp. 6070-6073 ◽  
Author(s):  
Erik Lindstedt ◽  
Raju Ghosh ◽  
Berit Olofsson
Keyword(s):  
Metal Free ◽  
Aryl Ethers

scholarly journals Complexes of Cu(II) Ions and Noncovalent Interactions in Systems with L-Aspartic Acid and Cytidine-5'-Monophosphate

2008 ◽  
Vol 2008 ◽  
pp. 1-10 ◽  
Author(s):  
Romualda Bregier-Jarzebowska ◽  
Anna Gasowska ◽  
Lechosław Lomozik
Keyword(s):  
Aspartic Acid ◽  
Metal Ion ◽  
Molecular Complexes ◽  
Main Reaction ◽  
Carboxyl Groups ◽  
Reaction Centre ◽  
Solution Ph ◽  
Metal Free ◽  
Reaction Centres ◽  
Oxygen Atoms

Interactions between aspartic acid (Asp) and cytidine-5-monophosphate (CMP) in metal-free systems as well as the coordination of Cu(II) ions with the above ligands were studied. The composition and overall stability constants of the species formed in those systems were determined by the potentiometric method, and the interaction centres in the ligands were identified by the spectral methods UV-Vis, EPR, NMR, and IR. In metal-free systems, the formation of adducts, in which each ligand has both positive and negative reaction centres, was established. The main reaction centres in Asp are the oxygen atoms of carboxyl groups and the nitrogen atom of the amine group, while the main reaction centre in CMP at low pH is the N(3) atom. With increasing pH, the efficiency of the phosphate group of the nucleotide in the interactions significantly increases, and the efficiency of carboxyl groups in Asp decreases. The noncovalent reaction centres in the ligands are simultaneously the potential sites of metal-ion coordination. The mode of coordination in the complexes formed in the ternary systems was established. The sites of coordination depend clearly on the solution pH. In the molecular complexesML⋯L, metallation involves the oxygen atoms of the carboxyl groups of the amino acid, while the protonated nucleotide is in the outer coordination sphere and interacts noncovalently with the anchoringCuHx(Asp) species. The influence of the metal ions on the weak interactions between the biomolecules was established.

scholarly journals Metal-free [2+2+1] cycloaddition polymerization of alkynes, nitriles, and oxygen atoms to functional polyoxazoles

RSC Advances ◽  
2020 ◽  
Vol 10 (41) ◽  
pp. 24368-24373 ◽  
Author(s):  
Lichao Dong ◽  
Tian Lan ◽  
Yin Liang ◽  
Shifeng Guo ◽  
Hao Zhang
Keyword(s):  
Trifluoromethanesulfonic Acid ◽  
Metal Free ◽  
Oxygen Atoms

The metal-free [2+2+1] cycloaddition polymerization of alkynes, nitriles, and O-atoms for the regioselective assembly of highly substituted oxazole compounds has been achieved by the use of iodosobenzene (PhIO) with trifluoromethanesulfonic acid (TfOH).

Metal-Free Oxidative Cyclization of Alkynyl Aryl Ethers to Benzofuranones

2013 ◽  
Vol 52 (48) ◽  
pp. 12727-12731 ◽  
Author(s):  
Katharina Graf ◽  
Carmen L. Rühl ◽  
Matthias Rudolph ◽  
Frank Rominger ◽  
A. Stephen K. Hashmi
Keyword(s):  
Oxidative Cyclization ◽  
Metal Free ◽  
Aryl Ethers

scholarly journals Correction: Metal-free [2+2+1] cycloaddition polymerization of alkynes, nitriles, and oxygen atoms to functional polyoxazoles

RSC Advances ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 2292-2292
Author(s):  
Lichao Dong ◽  
Tian Lan ◽  
Yin Liang ◽  
Shifeng Guo ◽  
Hao Zhang
Keyword(s):  
Metal Free ◽  
Oxygen Atoms

Correction for ‘Metal-free [2+2+1] cycloaddition polymerization of alkynes, nitriles, and oxygen atoms to functional polyoxazoles’ by Lichao Dong et al., RSC Adv., 2020, 10, 24368–24373, DOI: 10.1039/D0RA04249H.

A Mild and Practical Method for Deprotection of Aryl Methyl/ Benzyl/Allyl Ethers with HPPh2 and tBuOK

2021 ◽  
Author(s):  
WenJing Pan ◽  
Chenchen Li ◽  
Haoyin Zhu ◽  
Fangfang Li ◽  
Tao Li ◽  
...  
Keyword(s):  
Practical Method ◽  
Reaction Conditions ◽  
Metal Free ◽  
Allyl Ethers ◽  
Aryl Ethers ◽  
Aryl Methyl ◽  
General Method

A general method for the demethylation, debenzylation, and deallylation of aryl ethers using HPPh2 and tBuOK is reported. The reaction features mild and metal-free reaction conditions, broad substrate scope, good...

Metal-Free [2 + 2 + 1] Annulation of Alkynes, Nitriles, and Oxygen Atoms: Iodine(III)-Mediated Synthesis of Highly Substituted Oxazoles

2013 ◽  
Vol 15 (11) ◽  
pp. 2672-2675 ◽  
Author(s):  
Akio Saito ◽  
Akihiro Taniguchi ◽  
Yui Kambara ◽  
Yuji Hanzawa
Keyword(s):  
Metal Free ◽  
Oxygen Atoms
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