267002-57-3Relevant academic research and scientific papers
One-pot Construction of Difluorinated Pyrrolizidine and Indolizidine Scaffolds via Copper-Catalyzed Radical Cascade Annulation
Wang, Xiaoyang,Li, Miao,Yang, Yanyan,Guo, Minjie,Tang, Xiangyang,Wang, Guangwei
supporting information, p. 2151 - 2156 (2018/04/26)
A convenient approach to the synthesis of diverse difluorinated nitrogen-containing polycycles via a copper-catalyzed radical cascade annulation of amine-containing olefins and ethyl bromodifluoroacetate was developed. Three new bonds, including a Csp3 ?CF2 and two C?N bonds, are forged simultaneously in this strategy. Through this strategy, a series of difluorinated pyrrolizidine and indolizidine derivatives have been conveniently synthesized in good yields. (Figure presented.).
Green Organocatalytic Synthesis of Indolines and Pyrrolidines from Alkenes
Theodorou, Alexis,Kokotos, Christoforos G.
supporting information, p. 1577 - 1581 (2017/05/05)
Employing a green and efficient 2,2,2-trifluoroacetophenone-catalyzed oxidation of alkenes, which utilizes H2O2 as the green oxidant, a novel and sustainable synthesis of indolines and pyrrolidines was developed. This constitutes a cheap, general and environmentally-friendly protocol for the synthesis of substituted nitrogen-containing heterocycles. A variety of substitution patterns, both aromatic and aliphatic moieties, are well tolerated leading to the desired nitrogen heterocycles in good to excellent yields. (Figure presented.).
M-CPBA-Mediated Intramolecular Aminohydroxylation of N-Sulfonyl Aminoalkenes to Synthesize β-Hydroxyl Cyclic Amines
Yin, Yan,Zhou, Hong,Sun, Guofeng,Liu, Xichen
, p. 1337 - 1345 (2015/10/06)
A variety of structurally diverse N-sulfonyl-protected aminoalkenes readily reacted with m-CPBA to produce a series of β-hydroxyl cyclic amines in high yields through intramolecular aminohydroxylation. This metal-free and easy-to-handle synthetic methodol
Efficient copper-catalyzed direct intramolecular aminotrifluoromethylation of unactivated alkenes with diverse nitrogen-based nucleophiles
Lin, Jin-Shun,Xiong, Ya-Ping,Ma, Can-Liang,Zhao, Li-Jiao,Tan, Bin,Liu, Xin-Yuan
supporting information, p. 1332 - 1340 (2014/04/03)
A mild, convenient, and step-economical intramolecular aminotrifluoromethylation of unactivated alkenes with a variety of electronically distinct, nitrogen-based nucleophiles in the presence of a simple copper salt catalyst, in the absence of extra ligand
Palladium-catalyzed selective aminoamidation and aminocyanation of alkenes using isonitrile as amide and cyanide sources
Jiang, Huanfeng,Gao, Hanling,Liu, Bifu,Wu, Wanqing
supporting information, p. 15348 - 15351 (2015/01/08)
A mild and efficient palladium-catalyzed intermolecular aminoamidation and aminocyanation reaction of alkenes with a broad substrate scope has been developed. This cyclization process provides a valuable synthetic tool for obtaining substituted indolines, tetrahydroisoquinolines and pyrrolidines in good to excellent yields. This journal is
A new entry to the phenanthridine ring system
Mondal, Poulomi,Thander, Latibuddin,Chattopadhyay, Shital K.
supporting information; scheme or table, p. 1328 - 1331 (2012/04/04)
A new synthesis of phenanthridine derivatives having three-point diversity has been developed based on the sequential application of three-atom economic processes viz. aza-Claisen rearrangement, ring-closing enyne metathesis and Diels-Alder reaction as key steps. An unexpected isomerisation was observed during aza-Claisen rearrangement of N-allylanilines which may open up new opportunities in heterocyclic synthesis.
Synthesis of indolines, indoles, and benzopyrrolizidinones from simple aryl azides
Brucelle, Fran?ois,Renaud, Philippe
supporting information; experimental part, p. 3048 - 3051 (2012/08/14)
A simple approach to prepare indolines and benzopyrrolizidinones from ortho-azidoallylbenzenes via a tandem radical addition/cyclization is described. The use of triethylborane to initiate and sustain the process provides the best results. Indolines are easily converted into the corresponding indoles by oxidation with manganese dioxide.
Oxidative diamination of alkenes with ureas as nitrogen sources: Mechanistic pathways in the presence of a high oxidation state palladium catalyst
Muniz, Kilian,Hoevelmann, Claas H.,Streuff, Jan
, p. 763 - 773 (2008/09/19)
A first palladium-catalyzed intramolecular diamination of unfunctionalized terminal alkenes has recently been reported. This study investigates the details of its mechanistic course based on NMR titration, kinetic measurements competition experiments, and deuterium labeling. It concludes a two-step procedure consisting of syn-aminopalladation with an unligated palladium(II) catalyst state followed by oxidation to palladium(IV) and subsequent C-N bond formation to give the final products as cyclic diamines. Related reactions employing sulfamides give rise to aminoalkoxy-functionalization of alkenes. This process was investigated employing deuterated alkenes and found to follow an identical mechanism where stereochemistry is concerned. It exemplifies the importance of cationic palladium(IV) intermediates prior to the final reductive elimination from palladium and proves that the nucelophile for this step stems from the immediate coordination sphere of the palladium(IV) precursor. These results have important implications for the general development of alkene 1,2-difunctionalization and for the individual processes of aminopalladation and palladium-catalyzed Calkyl-N bond formation.
A metal-free approach to the synthesis of indoline derivatives by a phenyliodine(III) bis(trifluoroacetate)-mediated amidohydroxylation reaction
Correa, Arkaitz,Tellitu, Imanol,Dominguez, Esther,SanMartin, Raul
, p. 8316 - 8319 (2007/10/03)
A novel approach to the synthesis of indoline derivatives is presented. The key cyclization step features the phenyliodine-(III) bis(trifluoroacetate)- (PIFA-) mediated formation of a N-acylnitrenium ion and its succeeding intramolecular trapping by the o
Novel strategies for the solid phase synthesis of substituted indolines and indoles
Nicolaou,Roecker,Hughes, Robert,Van Summeren, Ruben,Pfefferkorn, Jeffrey A.,Winssinger, Nicolas
, p. 465 - 476 (2007/10/03)
Using a polymer-bound selenenyl bromide resin, o-allyl and o-prenyl anilines were cycloaded to afford a series of solid-supported indoline and indole scaffolds. These scaffolds were then functionalized and cleaved via four distinct methods, namely traceless reduction, radical cyclization, radical rearrangement, and oxidative elimination, to afford 2-methyl indolines, polycyclic indolines, 2-methyl indoles, and 2-propenyl indolines, respectively. A number of small combinatorial libraries of compounds reminiscent of certain designed ligands of biological interest were constructed demonstrating the potential utility of the developed methodology to chemical biology studies and the drug discovery process.
