A ruthenium-catalyzed [5+1] annulation of 1-(2-aminophenyl)pyrroles with α-carbonyl sulfoxonium ylides is reported. This reaction provides a one-step method for synthesizing pyrrolo[1,2-a]quinoxaline derivatives under ambient conditions. The system proceeds with a short reaction time and a high functional-group tolerance. Notably, this divergent protocol tolerates β-keto sulfoxonium ylides and can
Copper-Catalyzed Synthesis of Alkyl-Substituted Pyrrolo[1,2-a]quinoxalines from 2-(1H-Pyrrol-1-yl)anilines and Alkylboronic Acids
作者:Rulong Yan、Xin Guan
DOI:10.1055/s-0037-1610743
日期:2020.3
A radical pathway for the construction of pyrrolo[1,2-a]quinoxalines by using 2-(1H-pyrrol-1-yl)anilines and alkylboronic acids has been developed. Features of this process include Cu catalysis, readily accessible starting materials, and simple operations. Alkylboronic acids are used for the construction of pyrrolo[1,2-a]quinoxaline derivatives, and the desired products are obtained in moderate yields
Copper-catalyzed tandem aerobic oxidative cyclization for the synthesis of 4-cyanoalkylpyrrolo[1,2-<i>a</i>]quinoxalines from 1-(2-aminophenyl)pyrroles and cyclobutanone oxime esters
作者:Zhenyu An、Yong Jiang、Xin Guan、Rulong Yan
DOI:10.1039/c8cc06256k
日期:——
A copper-catalyzed tandem ring-opening/cyclization reaction for the synthesis of 4-cyanoalkylpyrrolo[1,2-a]quinoxalines from 1-(2-aminophenyl)pyrroles and cyclobutanone oxime esters has been developed. This reaction involves C–C bond cleavage and C–C and C–N bond constructions with good functional group tolerance. A wide range of products are obtained in moderate to good yields under mild conditions
已开发了一种铜催化串联开环/环化反应,用于由1-(2-氨基苯基)吡咯和环丁酮肟酯合成4-氰基烷基吡咯并[1,2- a ]喹喔啉。该反应涉及C–C键断裂以及具有良好官能团耐受性的C–C和C–N键结构。在温和的条件下,可以以中等到良好的产率获得各种各样的产品。
Pyrroloquinoxaline Derivatives as High-Affinity and Selective 5-HT<sub>3</sub> Receptor Agonists: Synthesis, Further Structure−Activity Relationships, and Biological Studies
[(3)H]zacopride binding. The SAR studies detailed herein delineated a number of structural features required for improving affinity. Some of the ligands were employed as "molecular yardsticks" to probe the spatial dimensions of the lipophilic pockets L1, L2, and L3 in the 5-HT(3) receptor cleft, while the 7-OH pyrroloquinoxaline analogue was designed to investigate hydrogen bonding with a putative receptor site
carboxamides/carbamates supported on a pharmacogenic pyrroloquinoxaline scaffold as inhibitors of the endocannabinoid catabolizing enzymes fattyacidamidehydrolase (FAAH) and monoacylglycerollipase (MAGL). Structure–activity relationships and molecular modelling studies allowed the definition of the structural requirements for dual FAAH/MAGL inhibition and led to the identification of a small set of derivatives