153633-36-4Relevant academic research and scientific papers
Integration of oxidative arylation with sulfonyl migration: One-pot tandem synthesis of densely functionalized (NH)-pyrroles
Laha, Joydev K.,Sharma, Shubhra,Bhimpuria, Rohan A.,Dayal, Neetu,Dubey, Gurudutt,Bharatam, Prasad V.
, p. 8791 - 8803 (2017/08/29)
A one-pot synthesis of 2-aryl-3-alkyl/aryl-sulfonyl-(NH)-pyrroles from N-sulfonylpyrroles, developed for the first time, via palladium-catalyzed oxidative C-2 arylation followed by sulfonyl migration is described. The simple, easy access to the highly functionalized free-NH pyrroles secures opportunities for the preparation of compounds with promising biological activities in contemporary organic synthesis. The event of sulfonyl migration from pyrrole-N to C-3 is thermodynamically favored as revealed by density functional methods. The different plausible mechanisms for the migration of the sulfonyl group are also discussed.
Magnesiation of N-Heterocycles Using i-PrMgCl · LiCl and catalytic diisopropylamine
Nxumalo,Dinsmore
supporting information, p. 2478 - 2484 (2015/11/10)
The direct magnesiation of various N-heterocyclic compounds with i-PrMgCl · LiCl and catalytic diisopropylamine allows for preparation of 2-substituted pyrroles, imidazole, indoles, and benzimidazoles, in moderate to good yields. The magnesiated substrates canreadily undergo a Kumada-type coupling with iodo-aryls in the presence of catalytic Pd(PPh3)4.
An efficient and selective synthesis of 2,5-substituted pyrroles by gold-catalysed ring expansion of alkynyl aziridines
Davies, Paul W.,Martin, Nicolas
scheme or table, p. 159 - 164 (2011/02/16)
A range of substituted alkynyl aziridines undergo a ring expansion to afford 2,5-substituted pyrroles under gold catalysis. While effective conditions can be generated from other gold sources, a combination of Ph3PAuCl and AgOTs generate a cata
An extremely facile synthesis of furans, pyrroles, and thiophenes by the dehydrative cyclization of propargyl alcohols
Aponick, Aaron,Li, Chuan-Ying,Malinge, Jeremy,Marques, Emerson Finco
supporting information; experimental part, p. 4624 - 4627 (2009/12/09)
Furans, pyrroles, and thiophenes are efficiently prepared by gold-catalyzed dehydrative cyclizations of readily available, heteroatom-substituted propargyllc alcohols. The reactions are rapid, high-yielding, and procedurally simple, giving essentially pure aromatic heterocycles In minutes under open-flask conditions with catalyst loadings as low as 0.05 mol %.
A facile and regioselective synthesis of 2,5-disubstituted pyrroles via gold-catalyzed cycloisomerization of acetylenylaziridines
Chen, Dong-Dong,Hou, Xue-Long,Dai, Li-Xin
supporting information; experimental part, p. 6944 - 6946 (2010/02/27)
Gold-catalyzed cycloisomerization reaction of acetylenylaziridines provides 2,5-disubstituted pyrroles in high yields. The presence of protic species accelerates the reaction rate and improves the yields of pyrrole products.
1-Alkyl-2-aryl-4-(1-naphthoyl)pyrroles: New high affinity ligands for the cannabinoid CB1 and CB2 receptors
Huffman, John W.,Padgett, Lea W.,Isherwood, Matthew L.,Wiley, Jenny L.,Martin, Billy R.
, p. 5432 - 5435 (2007/10/03)
Two series of 1-alkyl-2-aryl-4-(1-naphthoyl)pyrroles were synthesized and their affinities for the cannabinoid CB1 and CB2 receptors were determined. In the 2-phenyl series (5) the N-alkyl group was varied from n-propyl to n-heptyl. A second series of 23 1-pentyl-2-aryl-4-(1-naphthoyl)-pyrroles (6) was also prepared. Several compounds in both series have CB1 receptor affinities in the 6-30 nM range. The high affinities of these pyrrole derivatives relative to JWH-030 (1, R = C5H11) support the hypothesis that these pyrroles interact with the CB1 receptor primarily by aromatic stacking.
2-Bromo-N-(p-toluenesulfonyl)pyrrole: A Robust Derivative of 2-Bromopyrrole
Knight, Lea W.,Huffman, John W.,Isherwood, Matthew L.
, p. 1993 - 1996 (2007/10/03)
2-Bromo-AL(p-toluenesulfonyl)pyrrole (2), a crystalline stable derivative of 2-bromopyrrole (1) has been prepared in 80% yield by bromination of pyrrole, followed by conversion to the N-(p-toluenesulfonyl) derivative. This compound is stable indefinitely at ambient temperature. Compound 2 is an excellent substrate for Suzuki coupling with arylboronic acids.
N-p-Toluenesulfonylpyrroles from 1,3-dienes
Harrington,Sanchez
, p. 175 - 180 (2007/10/02)
1,3-Dienes can be converted to N-p-toluenesulfonylpyrroles in two steps: 1) [4+2]-cycloaddition with N-sulfinyl-p-toluenesulfonamide and 2) conversion of the 3,6-dihydro-1,2-thiazine oxide adduct to a pyrrole using triethylamine-trimethylphosphite.
