97608-38-3Relevant academic research and scientific papers
Access to C5-Alkylated Indolines/Indoles via Michael-Type Friedel-Crafts Alkylation Using Aryl-Nitroolefins
Ertugrul, Berrak,Kilic, Haydar,Lafzi, Farrokh,Saracoglu, Nurullah
, p. 9018 - 9038 (2018/06/27)
A straightforward synthetic route toward C5-alkylated indolines/indoles has been developed. The strategy is composed of Zn(OTf)2-catalyzed Friedel-Crafts alkylation of N-benzylindolines with nitroolefins, and a series of diverse indolines was first obtained in up to 99% yield. This reaction provides a direct and practical route to a variety of the C5-alkylated indolines which were also utilized for accessing corresponding indoles. Indoline derivatives with free NH groups could be obtained through an N-deprotection reaction. Moreover, the primary alkyl nitro groups in both indolines and indoles are amenable to further synthetic elaborations, thereby broadening the diversity of the products.
Synthesis of Indolines by a Zn-Mediated Mannich Reaction/Pd-Catalyzed Amination Sequence
Presset, Marc,Pignon, Antoine,Paul, Jér?me,Le Gall, Erwan,Léonel, Eric,Martens, Thierry
, p. 3302 - 3310 (2017/03/23)
1,2-Disubstituted indolines have been prepared in fair to good yields by a Zn-mediated organometallic Mannich reaction, followed by an intramolecular Pd-catalyzed aromatic amination. The reactions are easy to set up and compatible with a large variety of simple or commercially available reagents. The method was further extended to the preparation of a 1,2,3-trisubstituted indoline.
Indoline Analogues of Idazoxan: Potent α2-Antagonists and α1-Agonists
Fagan, Gay P.,Chapleo, Christopher B.,Lane, Anthony C.,Myers, Malcolm,Roach, Alan G.,et al
, p. 944 - 948 (2007/10/02)
The synthesis and α-adrenergic activity of a series of substituted 2-imidazolinylindolines are described.Substitution in the indoline ring generated compounds with a spectrum of adrenoceptor antagonist/agonist profiles that proved sensitive to both the nature and position of the substituent.Many of the derivatives possess greater presynaptic antagonist potency that the corresponding benzodioxan 1, dihydrobenzofuran 2, and indan 3 analogues; however, this α2-antagonism is often accompanied by α1-agonist activity.It was not possible to separate α2-antagonist from α1-agonist properties in this series.Compounds of most interest proved to be the N-ethyl 6, 5-chloro-N-methyl 18 and 5-chloro-N-ethyl 23 derivatives, all being potent α2-antagonists and α1-agonists.Substitution at the 4- and 7-position of the indoline ring generally gave compounds with nonselective agonist properties.
Alpha 2-adrenergic agonists/antagonists: the synthesis and structure-activity relationships of a series of indolin-2-yl and tetrahydroquinolin-2-yl imidazolines.
Hlasta,Luttinger,Perrone,Silbernagel,Ward,Haubrich
, p. 1555 - 1562 (2007/10/02)
The synthesis and alpha 2-adrenergic activity of a series of indolin-2-yl and tetrahydroquinolin-2-yl imidazolines are described. The indolin-2-yl imidazoline 4b was found to possess potent alpha 2-adrenergic agonist and antagonist activity. The modification of the substituents on the indoline ring of 4b has led to the separation of these activities. Substitution on the aromatic ring of 4b with halogen or increasing the size of the N-alkyl substituent of 4b gave alpha 2-adrenergic antagonists without agonist activity. The N-allylindoline 4d is more potent than idazoxan in vitro and is equipotent in vivo, but is less receptor selective (alpha 2 vs. alpha 1) than idazoxan. The cis-1,3-dimethylindolin-2-yl imidazoline 6a is an alpha 2-adrenergic agonist equal in potency to clonidine in vitro, while the trans-1,3-dimethylindolin-2-yl imidazoline 6b is a moderately potent alpha 2-adrenergic antagonist.
