Enols as Feasible Acid Components in the Ugi Condensation
摘要:
Heterocyclic enols are used for the first time as acid components in an Ugi-type multicomponent condensation. For that purpose, we have chosen enols containing a Michael acceptor, in order to facilitate an irreversible rearrangement of the primary Ugi adduct. The new four-component process leads readily and efficiently to heterocyclic enamines containing at least six elements of diversity.
Enols as Feasible Acid Components in the Ugi Condensation
摘要:
Heterocyclic enols are used for the first time as acid components in an Ugi-type multicomponent condensation. For that purpose, we have chosen enols containing a Michael acceptor, in order to facilitate an irreversible rearrangement of the primary Ugi adduct. The new four-component process leads readily and efficiently to heterocyclic enamines containing at least six elements of diversity.
Lactic acid as an invaluable bio-based solvent for organic reactions
作者:Jie Yang、Jia-Neng Tan、Yanlong Gu
DOI:10.1039/c2gc36083g
日期:——
3-dicarbonyl compounds. In these reactions, lactic acidsolvent exhibited many advantages including bio-based origin, superior synthetic efficiency, ease of isolating the product and good recyclability of the reaction medium. The concept of using lactic acid as a green solvent not only enriches the diversity and versatility of bio-based green solvents, but also offers us an effective means for designing
Visible light-promoted synthesis of pyrrolidinone derivatives <i>via</i> Rose Bengal as a photoredox catalyst and their photophysical studies
作者:Arup Dutta、Mostofa A. Rohman、Ridaphun Nongrum、Aiborlang Thongni、Sivaprasad Mitra、Rishanlang Nongkhlaw
DOI:10.1039/d1nj00343g
日期:——
Herein, we report an intramolecular radical cyclization reaction towards the synthesis of pyrrolidinone derivatives via metal-free photoredox catalysis under irradiation from blue LEDs. Some of the remarkable features of this protocol include synthetic efficiency, green reaction profile, easy isolation of products and short reaction time. The photophysical properties of synthesized compounds were investigated
Selective Synthesis of 3-Substituted Pyrrolidinones by Enol-Passerini and Anomalous Enol-Passerini Condensations
作者:Ana G. Neo、Carlos F. Marcos
DOI:10.1021/acs.orglett.8b01462
日期:2018.7.6
the reaction conditions. These new transformations have proven to be a convenient alternative for the synthesis of biologically relevant pyrrolidinones containing peptidic or pseudo-peptidic groups on carbon 3. More importantly, this work attests to the utility of heterocyclic enols containing conjugated electron-withdrawing groups as useful reagents in isocyanide-based multicomponent reactions.
as a sulfonic acid-functionalized ionic liquid was demonstrated for the synthesis of pyrrolidinone derivatives under mild conditions. The electronic effect of substituents on aniline derivatives was investigated. Further, a study on the structure–activity relationship of ionic liquids containing sulfonic groups for the synthesis of ethyl-2-(4-chlorophenyl)-4-hydroxy-5-oxo-1-(p-tolyl)-2,5-dihydro-1H
Green one-pot multicomponent synthesis of pyrrolidinones using planetary ball milling process under solvent-free conditions
作者:Nader Ghaffari Khaligh、Taraneh Mihankhah、Mohd Rafie Johan
DOI:10.1080/00397911.2019.1601225
日期:2019.5.19
novel and efficient protocol for the synthesis of pyrrolidinones using catalytic loading of 1,1'-butylenebis(3-sulfo-3H-imidazol-1-ium) hydrogen sulfate as a recyclable Brönsted acid ionic liquid through ball milling process at room temperature undersolvent-freeconditions. The developed method provides good to excellent yields of various pyrrolidinones in environmentally friendly conditions. Furthermore