5398-69-6Relevant academic research and scientific papers
A new synthesis of 'push-pull' naphthalenes by condensation of nitro-2-methylbenzoate esters with dimethylacetamide dimethyl acetal
Wong, See-Mun,Shah, Bhavini,Shah, Priyal,Butt, Ian C.,Woon, Esther C.Y.,Wright, James A.,Thompson, Andrew S.,Upton, Christopher,Threadgill, Michael D.
, p. 2299 - 2302 (2002)
Whereas condensation of 2-methyl-3-nitrobenzoate esters with dimethylformamide dimethyl acetal gives 5-nitroisocoumarin, analogous condensation with dimethylacetamide dimethyl acetal proceeds via a different route, affording 1-methoxy-3-dimethylamino-5-ni
One-Pot Synthesis and Conformational Analysis of Six-Membered Cyclic Iodonium Salts
Caspers, Lucien D.,Spils, Julian,Damrath, Mattis,Lork, Enno,Nachtsheim, Boris J.
, p. 9161 - 9178 (2020/08/14)
Two one-pot procedures for the construction of carbon-bridged diaryliodonium triflates and tetrafluoroborates are described. Strong Br?nsted acids enable the effective Friedel-Crafts alkylation with diversely substituted o-iodobenzyl alcohol derivatives, providing diphenylmethane scaffolds, which are subsequently oxidized and cyclized to the corresponding dibenzo[b,e]iodininium salts. Based on NMR investigations and density functional theory (DFT) calculations, we could verify the so-far-undescribed existence of two stable isomers in cyclic iodonium salts substituted with aliphatic side chains in the carbon bridge.
[Bis(trifluoroacetoxy)iodo]p-nitrobenzene and [bis(trifluoroacetoxy)iodo]pentafluorobenzene as lead reagents for the direct ring contraction of lactams to pyrrolidines
Aubert-Nicol, Samuel,Heinrich, Nora,Lessard, Jean,Spino, Claude
, p. 484 - 501 (2019/08/01)
Two 3-iodanes, namely [bis(trifluoroacetoxy)iodo]p-nitrobenzene and [bis(trifluoroacetoxy)iodo]pentafluorobenzene, were used to effect the direct ring-contraction of lactams to pyrrolidines. Intense reaction optimization was necessary but only
A photoredox-neutral Smiles rearrangement of 2-aryloxybenzoic acids
Gonzalez-Gomez, Jose C.,Ramirez, Nieves P.,Lana-Villarreal, Teresa,Bonete, Pedro
supporting information, p. 9680 - 9684 (2017/11/30)
We report on the use of visible light photoredox catalysis for the radical Smiles rearrangement of 2-aryloxybenzoic acids to obtain aryl salicylates. The method is free of noble metals and operationally simple and the reaction can be run under mild batch or flow conditions. Being a redox neutral process, no stoichiometric oxidants or reductants are needed.
Intriguing substituent effect in modified Hoveyda-Grubbs metathesis catalysts incorporating a chelating iodo-benzylidene ligand
Barbasiewicz, Michal,Blocki, Krzysztof,Malinska, Maura,Pawlowski, Robert
supporting information, p. 355 - 358 (2013/02/22)
A series of modified Hoveyda-Grubbs catalysts incorporating a chelating iodo-benzylidene ligand were prepared and characterized. The presence of electron-withdrawing ring substituents in the para position to the iodide was found to decrease the catalytic activity, revealing that dissociation of the Ru...I-Ar bond is not the rate-determining step.
BICYCLIC COMPOUND AND PHARMACEUTICAL USE THEREOF
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Page/Page column 103, (2010/01/29)
The present invention provides a compound represented by the formula wherein R1 is a hydrocarbon group optionally having substituent(s), amino optionally having substituent(s), hydroxy optionally having a substituent or a heterocyclic group optionally having substituent(s); R2 is a hydrogen atom or a hydrocarbon group optionally having substituent(s); Xa and Xb are each C, N, O or S; Xc and Xd are each C or N; m is 0-2; n is 1-3; ring A is a 5-membered ring optionally having substituent(s); ring B is a 6-membered ring optionally having substituent(s); and ring C is a 3- to 5-membered ring optionally having substituent(s), provided that when Xa, Xc and Xd are each C, then Xb is N or S, or a salt thereof, which is useful as an agent for the prophylaxis or treatment of a disease relating to an action of melatonin, and the like.
5-Nitroisocoumarins from tandem Castro-Stephens coupling-6-endo-dig cyclisation of 2-iodo-3-nitrobenzoic acid and arylethynes and ring-closure of methyl 2-alkynyl-3-nitrobenzoates with electrophiles
Woon, Esther C.Y.,Dhami, Archana,Mahon, Mary F.,Threadgill, Michael D.
, p. 4829 - 4837 (2007/10/03)
Reaction of 2-iodo-3-nitrobenzoic acid with arylalkynyl copper(I) reagent gave 3-aryl-5-nitroisocoumarins. Castro-Stephens coupling was followed by in situ Cu-catalysed ring-closure. 1H NMR and X-ray crystallography showed the cyclisations to be 6-endo, contrasting with reports of 5-exo cyclisation of analogous 2-iodobenzoate esters with alkynes. Sonogashira couplings of methyl 2-iodo-3-nitrobenzoate with phenylacetylene and with trimethylsilylacetylene gave the corresponding 2-alkynyl-3-nitrobenzoate esters. With HgSO4, the phenylalkyne underwent 6-endo cyclisation to give 5-nitro-3-phenylisocoumarin. The disubstituted alkyne esters gave 4-phenylselenylisocoumarins with PhSeCl. 5-Nitro-3-phenyl-4-phenylselenylisocoumarin shows significant sterically-driven distortion of the isocoumarin ring. Reaction of methyl 3-nitro-2-phenylethynylbenzoate with ICl gave the 4-iodoisocoumarin. Thus the nitro group tends to direct these electrophile-driven cyclisations towards the 6-endo mode.
Synthesis and Chiroptical Properties of Bridged 2,2'-Diaminobiphenyl Derivatives
Seno, Kaoru,Hagishita, Sanji,Sato, Tomohiro,Kuriyama, Kaoru
, p. 2012 - 2022 (2007/10/02)
The relationship between c.d. spectra and the conformation of chiral 2,2'-diaminobiphenyls was investigated as a function of the torsion angle between the benzene ring planes.The molecular structures of (S)-(+)-4,5,6,7,11,12,13,14-octahydrobenzazocino
