13217-97-5Relevant academic research and scientific papers
Synthesis of Pyrrole Derivatives Mediated by Dicobalthexacarbonyl
Wang, Jeng-Long,Ueng, Chuen-Her,Yeh, Ming-Chang P.
, p. 2823 - 2826 (1995)
Addition of α- and β-amino acid derivatives to the cobalt stabilized propargylic cation 2 gives dicobalthexacarbonyl complexes with an amino acid derivative at the propargyl position.Oxidation of the resulting complexes with Fe(III) produces propargyl ami
Arylation of indoles using cyclohexanones dually-catalyzed by niobic acid and palladium-on-carbons
Ban, Kazuho,Sajiki, Hironao,Sawama, Yoshinari,Yamamoto, Yuta
supporting information, p. 3898 - 3902 (2020/06/03)
3-Arylindoles were easily constructed from indoles and cyclohexanone derivatives using a combination of catalytic niobic acid-on-carbon (Nb2O5/C) and palladium-on-carbon (Pd/C) under heating conditions without any oxidants. The Lewis acidic Nb2O5/C promoted the nucleophilic addition of indoles to the cyclohexanones, and the subsequent dehydration and Pd/C-catalyzed dehydrogenation produced the 3-arylindoles. The additive 2,3-dimethyl-1,3-butadiene worked as a hydrogen acceptor to facilitate the dehydrogenation step.
Unveiling the Biocatalytic Aromatizing Activity of Monoamine Oxidases MAO-N and 6-HDNO: Development of Chemoenzymatic Cascades for the Synthesis of Pyrroles
Scalacci, Nicoló,Black, Gary W.,Mattedi, Giulio,Brown, Nicola L.,Turner, Nicholas J.,Castagnolo, Daniele
, p. 1295 - 1300 (2017/08/09)
A chemoenzymatic cascade process for the sustainable production of pyrroles has been developed. Pyrroles were synthesized by exploiting the previously unexplored aromatizing activity of monoamine oxidase enzymes (MAO-N and 6-HDNO). MAO-N/6-HDNO whole cell biocatalysts are able to convert 3-pyrrolines into pyrroles under mild conditions and in high yields. Moreover, MAO-N can work in combination with the ruthenium Grubbs catalyst, leading to the synthesis of pyrroles from diallylamines/-anilines in a one-pot cascade metathesis-aromatization sequence.
BRIDGED BICYCLIC KALLIKREIN INHIBITORS
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Page/Page column 252; 253, (2016/12/26)
Provided herein are kallikrein modulating compounds, pharmaceutical compositions comprising the same, and uses thereof.
β-selective C-H arylation of pyrroles leading to concise syntheses of lamellarins C and I
Ueda, Kirika,Amaike, Kazuma,Maceiczyk, Richard M.,Itami, Kenichiro,Yamaguchi, Junichiro
supporting information, p. 13226 - 13232 (2015/03/30)
The first general β-selective C-H arylation of pyrroles has been developed by using a rhodium catalyst. This C-H arylation reaction, which is retrosynthetically straightforward but results in unusual regioselectivity, could result in de novo syntheses of
Structure-activity relationships in the inhibition of monoamine oxidase B by 1-methyl-3-phenylpyrroles
Ogunrombi, Modupe O.,Malan, Sarel F.,Terre'Blanche, Gisella,Castagnoli Jr., Neal,Bergh, Jacobus J.,Petzer, Jacobus P.
, p. 2463 - 2472 (2008/09/21)
1-Methyl-3-phenyl-3-pyrrolines are structural analogues of the neurotoxin 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP) and like MPTP are selective substrates of monoamine oxidase B (MAO-B). As part of an ongoing investigation into the substrate properties of various 1-methyl-3-phenyl-3-pyrrolinyl derivatives, it is shown in the present study that their respective MAO-B catalyzed oxidation products act as reversible competitive inhibitors of the enzyme. The most potent inhibitor among the oxidation products considered was 1-methyl-3-(4-trifluoromethylphenyl)pyrrole with an enzyme-inhibitor dissociation constant (Ki value) of 1.30 μM. The least potent inhibitor was found to be 1-methyl-3-phenylpyrrole with a Ki value of 118 μM. The results of an SAR study established that the potency of MAO-B inhibition by the 1-methyl-3-phenylpyrrolyl derivatives examined here is dependent on the Taft steric parameter (Es) and Swain-Lupton electronic constant (F) of the substituents attached to C-4 of the phenyl ring. Electron-withdrawing substituents with a large degree of steric bulkiness appear to enhance inhibition potency. Potency was also found to vary with the substituents at C-3, again with Es and F being the principal substituent descriptors.
Neurotoxicity studies with the monoamine oxidase B substrate 1-methyl-3-phenyl-3-pyrroline
Ogunrombi, Modupe O.,Malan, Sarel F.,Terre'Blanche, Gisella,Castagnoli, Kay,Castagnoli Jr., Neal,Bergh, Jacobus J.,Petzer, Jacobus P.
, p. 458 - 467 (2008/02/05)
The neurotoxic properties of the parkinsonian inducing agent 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP) are dependent on its metabolic activation in a reaction catalyzed by centrally located monoamine oxidase B (MAO-B). This reaction ultimately l
Direct C-arylation of free (NH)-indoles and pyrroles catalyzed by Ar-Rh(III) complexes assembled in situ
Wang, Xiang,Lane, Benjamin S.,Sames, Dalibor
, p. 4996 - 4997 (2007/10/03)
Ar-Rh(III) pivalate complexes assembled in situ from the reaction of [RhCl(coe)2]2 (coe = cis-cyclooctene), [p-(CF3)C6H4]3P, and CsOPiv effectively catalyzed the direct C-arylation of free (NH)-indoles and (NH)-pyrroles in good yields and with high regioselectivity. The reaction displayed excellent functional group compatibility and low moisture sensitivity. Kinetics studies support a mechanism involving phosphine displacement by indole in complex 2 (resting state of the catalyst), followed by a rate-limiting C-H bond metalation. Copyright
New Synthesis of 3-Arylpyrroles
Verniest, Guido,De Kimpe, Norbert
, p. 2013 - 2016 (2007/10/03)
3-Arylpyrroles were synthesized by reduction of 3- and 4-pyrrolin-2-ones with 9-borabicyclo[3.3.1]nonane (9-BBN).
Preparation of pyrroles by dehydrogenation of pyrrolidines with manganese dioxide
Bonnaud,Bigg
, p. 465 - 467 (2007/10/02)
The dehydrogenation of pyrrolidines by activated manganese dioxide provides a fairly general and mild method for the preparation of substituted pyrroles.
