Asymmetric meso-CF3-dipyrromethanes with amino- and heterocyclic functions from trifluoro(pyrrolyl)ethanols and pyrroles
摘要:
Asymmetric meso-CF3-dipyrromethanes with amino- and nitrogen heterocyclic functions, a new family of the BODIPY dye precursors, have been synthesized in 70-90 % yield by condensation of trifluoro(pyrrolyl)ethanols with pyrroles in the presence of AlCl3. This catalyst, for the first time, was shown to be more efficient than commonly used P2O5, which was entirely inactive in the condensation of pyrroles having basic substituents (amino group and pyrazole moiety).
Isomer-Specific Hydrogen Bonding as a Design Principle for Bidirectionally Quantitative and Redshifted Hemithioindigo Photoswitches
作者:Joshua E. Zweig、Timothy R. Newhouse
DOI:10.1021/jacs.7b04448
日期:2017.8.16
quantitative bidirectional isomerization. Additionally, extending conjugation from the electron-rich pyrrole results in quantitative visible-light photoswitches, as well as photoswitches that isomerize with red and near-infrared light. The presence of the hydrogen bond leading to the observed redshift is supported by computational and spectroscopicevidence.
2-Phenylpyrroles as conformationally restricted benzamide analogs. A new class of potential antipsychotics. 2
作者:Ineke Van Wijngaarden、Chris G. Kruse、Jan A. M. Van der Heyden、Martin T. M. Tulp
DOI:10.1021/jm00118a011
日期:1988.10
A series of 2-phenylpyrrole Mannichbases was synthesized and screened in pharmacological models for antipsychotic activity and extrapyramidal effects. Structure modifications of 5-(4-fluorophenyl)-2-[[4-(2-methoxyphenyl)-1-piperazinyl]methyl]pyrrole (1), the prototype of a new class of sodium-independent atypical dopamine D-2 antagonists, resulted in 2-[[4-(7-benzofuranyl)-1-piperazinyl]methyl]-5
Synthesis of Dihydropyrrolizine and Tetrahydroindolizine Scaffolds from Pyrroles by Titanocene(III) Catalysis
作者:Sven Hildebrandt、Andreas Gansäuer
DOI:10.1002/anie.201603985
日期:2016.8.8
A synthetic approach to dihydropyrrolizine and tetrahydroindolizine scaffolds from pyrroles has been developed. The key step, a titanocene(III)‐catalyzed radical arylation that proceeds by C−H functionalization is atom‐economical and tolerates a large variety of functional groups. The reaction is therefore attractive for the swift assembly of functional and structural diversity.
Indium-Catalyzed Formal N-Arylation and N-Alkylation of Pyrroles with Amines
作者:Kyohei Yonekura、Kenji Oki、Teruhisa Tsuchimoto
DOI:10.1002/adsc.201600656
日期:2016.9.15
indium Lewis acid catalysis, a nitrogen atom of N‐unsubstituted pyrroles was replaced with a nitrogen atom of primary amines, thereby producing N‐aryl‐ and N‐alkylpyrroles. This system formally introducing such carbon frameworks to the pyrrole nitrogen atom shows unique selectivity: only the H−N(pyrrolyl) unit undergoes the N‐arylation and N‐alkylation even in the coexistence of a similar H−N(indolyl)
Asymmetric Organocatalytic Michael Addition of Pyrroles to Enones by Cinchona Alkaloid-Derived Primary Amines
作者:Dieter Enders、Daniel Hack
DOI:10.1055/s-0033-1339546
日期:——
facilitating their possible application in medicinal chemistry. The enantioselective synthesis of 2-alkylated pyrroles via Michaeladdition of pyrroles to α,β-unsaturatedketones employing cinchona alkaloid-derived primary amines as organocatalysts is described. Good to excellent yields (78–99%) and good to very good enantioselectivities (75–93% ee) are obtained. With this protocol highly enantioenriched