73799-68-5Relevant academic research and scientific papers
Selective synthesis of trisubstituted pyrroles through the reactions of alkynyl Fischer carbene complexes with oxazolones
López, Julio,Velazco-Cabral, Iván,Rodríguez-DeLeón, Eloy,Villegas Gómez, Clarisa,Delgado, Francisco,Tamariz, Joaquín,Arrieta, Ana,Cossío, Fernando P.,Vázquez, Miguel A.
supporting information, p. 538 - 550 (2020/01/30)
An efficient and simple synthesis of novel trisubstituted 1H-pyrroles 4a-qvia 1,3-dipolar cycloaddition of Δ3-trifluoromethyloxazolones 2a-d with both chromium and tungsten alkynyl Fischer carbene complexes (1a-h) is described. An unexpected and unreported -CF3 group elimination process was observed in the pyrrole structure. Our experimental and theoretical data suggested that the metal fragment may be responsible for this phenomenon. The dipolar cycloaddition proceeded efficiently to produce a single regioisomer, which was unambiguously established through NMR and single-crystal X-ray diffraction studies. Nevertheless, the reaction of alkynyl carbenes bearing an α,β,γ,δ-unsaturated moiety with excess oxazolone 2a produced a polycyclic compound 6 speculatively formed through a cascade reaction involving 1,6-, 1,4- and 1,2-nucleophilic addition steps.
Gold-catalysed rearrangement of O-vinyl oximes for the synthesis of highly substituted pyrroles
Ngwerume, Simbarashe,Camp, Jason E.
supporting information; experimental part, p. 1857 - 1859 (2011/03/23)
O-Vinyl oximes were synthesised from the reaction of oximes with activated alkynes and subsequently rearranged using gold catalysis to afford highly substituted pyrroles in an efficient and regiocontrolled process. Additionally, pyrroles were formed direc
Synthesis of substituted pyrroles from N-vinylic phosphazenes derived from β-amino acids and α-bromo ketones
Palacios, Francisco,Herran, Esther,Rubiales, Gloria
, p. 89 - 92 (2007/10/03)
Synthesis of di-, tri- and tetrasubstituted pyrroles by reaction of Nvinylic phosphazenes derived from β-amino acids with α-bromo ketones is described.
4-Substituted 2-phenyl- and 2-phenyl-3-aryl pyrroles by reaction of tosyl benzyl isocyanide (TosBIC) with Michael acceptors
Di Santo,Costi,Massa,Artico
, p. 795 - 802 (2007/10/02)
Synthesis of 2-phenyl and 2,3-diphenylpyrroles bearing at the 4 position electronwithdrawing groups by reaction of tosylbenzylisocyanide (TosBIC) with various Michael acceptors was investigated. Sodium hydride and n-butyllithium were used as deprotonating agents for the synthesis of monophenyl and diphenylpyrroles, respectively.
Antiinflammatory 4,5-diaryl-α-polyfluoroalkyl-1H-pyrrole-2-methanols and method for use thereof
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, (2008/06/13)
4,5-Diaryl-α-polyfluoroalkyl-1H-pyrrole-2-methanols, such as 4,5-bis (4-fluorophenyl)-α, α-bis (trifluoromethyl)-1H-pyrrole-2-methanol, are useful in treatment of inflammation and relieving pain.
Anti-inflammatory 4,5-diaryl-α-(polyfluoroalkyl)-1H-pyrrole-2-methanamines
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, (2008/06/13)
4,5-Diaryl-α-(polyfluoroalkyl)-1H-pyrrole-2-methanamines such as 4,5-bis(4-fluorophenyl)-αα-bis-(trifluoromethyl)-1H-pyrrole-2-methanamine, useful in treatment of inflammation.
Antiinflammatory 4,5-diaryl-2-(substituted-thio)pyrroles and their corresponding sulfoxides and sulfones
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, (2008/06/13)
Antiinflammatory 4,5-diaryl-2-(substituted-thio)pyrroles and their corresponding sulfoxides and sulfones, useful for treating arthritis and related diseases.
Antiinflammatory 4,5-diaryl-α,α-bis(polyfluoromethyl)-1H-pyrrole-2-methanethiols
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, (2008/06/13)
4,5-Diaryl-α,α-bis(polyfluoromethyl)-1H-pyrrole-2-methanethiols, such as 4,5-bis(4-fluorophenyl)-α, α-bis(trifluoromethyl)-1H-pyrrole-2-methanethiol, useful in treatment of inflammation.
