Three-Component Tandem Reaction Involving Acid Chlorides, Terminal Alkynes, and 2-Aminoindole Hydrochlorides: Synthesis of α-Carboline Derivatives in Aqueous Conditions via Regioselective [3 + 3] Cyclocondensation
摘要:
An efficient synthesis toward highly diversified a-carboline derivatives via a three-component tandem reaction using acid chlorides, terminal allcynes, and 2-aminoindole hydrochlorides has been described. The salient feature of the one-pot strategy involves regioselective [3 + 3]-cyclocondensation and the presence of water in the reaction medium to facilitate cyclizafion. Nonaqueous conditions furnished products in poor yields.
Preparation of Pyrido[2,3-<i>b</i>
]indole Derivatives Using Silicates of Group 1 and 2 Metals
作者:Setareh Sheikh、Abbas Fazlinia
DOI:10.1002/jhet.3284
日期:2018.10
efficient synthesis of 2,4‐diaryl‐9H‐pyrido[2,3‐b] indole derivatives in aqueous medium via the three‐component reaction of indolin‐2‐one, a chalcone and ammonium acetate was developed using Na2SiO3, K2SiO3, Li2SiO3, CaSiO3, MgSiO3, BaSiO3, SrSiO3, and ZnSiO3 as catalysts. Results of activity evaluations indicated that among of the metal silicate used alkali metal silicates exhibits much higher activity than
Abstract A novel, simple, one-potsynthesis of 2,4-diaryl-9H-pyrido[2,3-b]indoles is described. Heating a mixture of chalcone, oxindole and ammonium acetate in the presence of potassium tert-butoxide under solvent-free conditions afforded the title compounds in good to excellent yields.