56454-26-3Relevant academic research and scientific papers
Observation of an Amplified Isotope Effect during Chlorination of 1-Methylpyrrole. Evidence for Rate Determing Deprotonation of the ?-Complex
Rosa, Michael De,Marquez, Manuel
, p. 1466 - 1467 (1989)
Observation of an amplified isotope effect to the value of 19.10 indicated that there were two kinetically significant proton transfers and deprotonation of the ?-complex was the rate determining step.
Graphitic carbon nitride polymer as a recyclable photoredox catalyst for fluoroalkylation of arenes
Baar, Moritz,Blechert, Siegfried
supporting information, p. 526 - 530 (2015/09/08)
Heterogeneous catalysis for trifluoromethylations and perfluoroalkylations has been performed. Through the usage of cheap, metal-free and recyclable mesoporous graphitic carbon nitride (mpg-CN) it was possible to fluoroalkylate various arenes by the reductive activation of sulfonyl chlorides with visible light. Thus, we were able to demonstrate the robustness and versatility of mpg-CN as a photoredox catalyst beyond water splitting and the activation of oxygen.
The use of an electrophile carrier to determine the number of intermediates in the chlorination of 1-methylpyrrole
De Rosa, Michael,Marquez, Manuel
, p. 2125 - 2129 (2007/10/03)
A kinetic and product study of the dichloroacetic acid catalyzed chlorination of 1-methylpyrrole with 3- and 4-substituted N-chlorobenzamides was carried out. Protonated N-chlorobenzamides served as carriers of CI+. A Hammett correlation was obtained with ρ=-0.68 (r=0.98, n=8). General acid catalysis was observed with α=0.48 (r=0.99 and n=7). The yields of 2-chlorination (84±0.7%) and 3-chlorination (2.6±0.4%) were essentially constant (constant intramolecular selectivity) as the substituent on the N-chlorobenzamide was varied. Observation of constant intramolecular selectivity indicated that two intermediates were formed during the acid catalyzed chlorination of 1-methylpyrrole with N-chlorobenzamides. The carrier method is applicable to all types of aromatic systems and limited only by the availability of suitable carrier molecules.
Detection of Electrophilic Aromatic Substitution by Addition-Elimination using Natural Abundance Deuterium NMR: a Pyrrole Example
Rosa, Michael De,Shadle, Robert G.,Foster, Natalie
, p. 1757 - 1758 (2007/10/02)
Natural abundance 2H NMR has been used to demonstrate that the reaction of 1-methylpyrrole with N-chloroimides occurs by addition-elimination and this method can be applied to other reactions.
EFFECT OF HALOGEN ON THE REACTION OF 1-METHYLPYRROLE WITH N-HALOIMIDES.
Rosa, Michael De,Nieto, Gustavo Cabrera
, p. 2405 - 2408 (2007/10/02)
In the reaction of N-haloimides with 1-methylpirrole, ?-substitution (addition-elimination) predominates over halogenation, when the halogen is chlorine.
First Example of Electrophilic Substitution by Addition-Elimination (?-Substitution) in Pyrroles
Rosa, Michael De,Brillembourg, Ines
, p. 1585 - 1586 (2007/10/02)
Reaction of 1-methylpyrrole with N-chloroacetanilide leads to the incorporation of an acetanilide moiety in the pyrrole ring by addition-elimination.
Nonsteroidal compounds as anti-inflammatory and analgesic agents
-
, (2008/06/13)
5-Aroyl-4-RO-, 5-aroyl-4-RS-, 5-aroyl-4-RSO-, 5-aroyl-4-RSO2 -, or 5-pyrrylcarbonyl-pyrrole alkanoic acid have been prepared via hydrolysis of a precursor-ester after high temperature decarboxylation or from direct acidic decarboxylation of a precursor diacid. The compounds are analgesic and anti-inflammatory agents of high activities but low ulcerogenic side effects.
