14381-51-2Relevant academic research and scientific papers
One-pot synthesis of substituted catechols from the corresponding phenols
Hansen, Trond Vidar,Skatteb?l, Lars
, p. 3357 - 3358 (2005)
Phenols are converted to salicylaldehydes with paraformaldehyde, MgCl 2-Et3N in THF, and when subsequently treated with aqueous NaOH and H2O2 afford the corresponding catechols. The sequence is conveniently carried out as a one-pot procedure.
Synthesis of 5,6-methylenedioxy-1-tetralone. An aryl Grignard approach from guaiacol
Klix, Russell C.,Cain, Michael H.,Bhatia, Ashok V.
, p. 6413 - 6414 (1995)
A convenient synthesis of 5,6-methylenedioxy-1-tetralone (1) is described. The main features of this synthesis are the formation of 6 via a Grignard reaction using succinic anhydride followed by selective reduction and Friedel-Crafts cyclization to generate the desired tetralone 1.
Novel preparation process of medical intermediate 3-bromocatechol
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Paragraph 0039-0043, (2020/11/01)
The invention discloses a synthesis process of a medical intermediate 3-bromocatechol, which is characterized in that cheap 1,2-dihydroxybenzene (catechol) is used as a raw material, and the 3-bromocatechol is prepared through a one-step substitution reaction. The synthetic route is simple, the production cost is low, and the synthetic process of 3-bromocatechol is suitable for industrial large-scale production.
Vicinal Diamination of Arenes with Domino Aryne Precursors
Li, Lu,Qiu, Dachuan,Shi, Jiarong,Li, Yang
supporting information, p. 3726 - 3729 (2016/08/16)
Vicinal diamination of domino aryne precursors was achieved with sulfamides. The reaction proceeds through a two-aryne pathway, accepting two N-nucleophiles at the 1,2-positions of an arene ring. Symmetrical and unsymmetrical diaminobenzenes were readily obtained.
A new avenue to the Dakin reaction in H2O2-WERSA
Saikia, Bishwajit,Borah, Parinita
, p. 105583 - 105586 (2015/12/30)
We have developed a novel protocol to realize the Dakin reaction in a more greener way. In fact, by the use of H2O2-WERSA, we can oxidize aromatic arylaldehydes to phenols at room temperature. It is remarkable that the catalytic system does not require activation or any toxic ligand, additive/promoter, transition metal catalyst, base, organic solvent and so on. A range of substituted hydroxylated benzaldehydes were screened to investigate the scope of this protocol.
Selective ortho-hydroxylation-defluorination of 2-fluorophenolates with a Bis(μ-oxo)dicopper(III) species
Serrano-Plana, Joan,Garcia-Bosch, Isaac,Miyake, Ryosuke,Costas, Miquel,Company, Anna
, p. 9608 - 9612 (2014/10/15)
The bis(μ-oxo)dicopper(III) species [CuIII 2(μ-O)2(m-XYLMeAN)]2+ (1) promotes the electrophilic ortho-hydroxylation-defluorination of 2-fluorophenolates to give the corresponding catechols, a reaction that is not accomplishable with a (η2:η2-O2) dicopper(II) complex. Isotopic labeling studies show that the incoming oxygen atom originates from the bis(μ-oxo) unit. Ortho-hydroxylation-defluorination occurs selectively in intramolecular competition with other ortho-substituents such as chlorine or bromine. O in, F out: [CuIII2(μ-O) 2(m-XYLMeAN)]2+ is a bis(μ-oxo)dicopper(III) species and promotes the electrophilic ortho-hydroxylation-defluorination of 2-fluorophenolates to give the corresponding catechols. Isotopic labeling shows that the incoming oxygen atom originates from the bis(μ-oxo) unit. Ortho-hydroxylation-defluorination occurs selectively in intramolecular competition with other ortho-substituents such as chlorine or bromine.
Structure, stereochemistry and synthesis of enantiopure cyclohexenone cis-diol bacterial metabolites derived from phenols
Boyd, Derek R.,Sharma, Narain D.,Malone, John F.,McIntyre, Peter B. A.,Stevenson, Paul J.,Allen, Christopher C. R.,Kwit, Marcin,Gawronski, Jacek
scheme or table, p. 6217 - 6229 (2012/09/05)
Biotransformation of 3-substituted and 2,5-disubstituted phenols, using whole cells of P. putida UV4, yielded cyclohexenone cis-diols as single enantiomers; their structures and absolute configurations have been determined by NMR and ECD spectroscopy, X-ray crystallography, and stereochemical correlation involving a four step chemoenzymatic synthesis from the corresponding cis-dihydrodiol metabolites. An active site model has been proposed, to account for the formation of enantiopure cyclohexenone cis-diols with opposite absolute configurations.
Synthesis of bulky 1,2-dialkoxy- and 1,2,3-trialkoxy-arenes
Stephan, Michel,Zupancic, Borut,Mohar, Barbara
experimental part, p. 6308 - 6315 (2011/09/19)
A large series of bulky 1,2-dialkoxy- and 1,2,3-trialkoxy-benzenes was efficiently prepared via Williamson etherification. Preparation of their contiguous bromine-containing derivatives was also achieved.
Synthesis of ACAT inhibitors through substitution using allylic picolinate and copper reagent
Kobayashi, Yuichi,Lalitnorasate, Paveena,Kaneko, Yuki,Kiyotsuka, Yohei,Endo, Yoshiki
scheme or table, p. 6018 - 6021 (2010/11/21)
Amide of an octanoic acid possessing an aryl group at C3 position is a highly potent ACAT inhibitor. In this paper, we describe a synthetic access to this class of compounds as optically active forms. The key reaction is substitution of the allylic picoli
PROCESS FOR THE PREPARATION OF GUANIDINO SUBSTITUTED BI-AND POLYPHENYLS THAT ARE SUITABLE AS SMALL MOLECULE CARRIERS
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Page/Page column 52-53, (2009/04/25)
A process for the production of a compound of formula (I), or a pharmaceutically acceptable salt thereof, Formula (I) which process comprises:(a) coupling a compound of formula (II) to a compound of formula (III) to form a compound of formula (IV).
