A convenient access to 1,3-disubstituted furo[3,4-b]indoles by acid ion-exchange resin-catalyzed furan formation
摘要:
Efficient synthesis of furo[3,4-b]indoles starting from the corresponding indole is reported. The first route involves derivatization, protection, and deprotection steps, which stretch the syntheses. The second method provides a shorter and more efficient strategy to accessing the furoindole. The innovation starts with alkylation at C-2 of the indole presenting at the C-3 position a ketone-acetal, followed by the cycloaromatization catalyzed by polymeric ion-exchange resins. The second route represents a significant improvement over other methods previously described. (C) 2011 Elsevier Ltd. All rights reserved.
Synthesis and antifungal activity of new 1-halogenobenzyl-3-imidazolylmethylindole derivatives
作者:Y Na
DOI:10.1016/s0223-5234(02)00005-3
日期:2003.1
A series of 1-benzyl-3-(imidazol-1-ylmethyl)indole derivatives 35-46 were prepared under mild reaction conditions and tested for their antifungal activity. Pharmacomodulation at N(1), C(2) and C(5) of the indole ring and at the level of the alkyl chain (R(1)) was carried out starting from the corresponding 3-acylindoles 6, 7 or 3-formylindoles 11-22. Target imidazolyl compounds 35-46 were obtained
A novel microwave-irradiated solvent-free 3-acylation of indoles on alumina
作者:Qiu Yu Lai、Rong Su Liao、Shao Yong Wu、Jia Xin Zhang、Xin Hong Duan
DOI:10.1039/c3nj00854a
日期:——
A simple and efficient 3-acylation of indoles under microwave-heated and solvent-free conditions is developed. This general procedure uses neutral Al2O3 as a new, green and reusable catalyst giving good to high yields within short reaction times. Utilizing such an environmentally-benign methodology, a variety of indoles bearing electron-releasing or electron-withdrawing groups were conveniently acylated.
Insecticidal activity of indole derivatives against Plutella xylostella and selectivity to four non-target organisms
作者:Ângela C. F. Costa、Sócrates C. H. Cavalcanti、Alisson S. Santana、Ana P. S. Lima、Thaysnara B. Brito、Rafael R. B. Oliveira、Nathália A. Macêdo、Paulo F. Cristaldo、Ana Paula A. Araújo、Leandro Bacci
DOI:10.1007/s10646-019-02095-1
日期:2019.10
have resistance to a range of insecticides. Indole derivates can exert diverse biological activities, and different effects may be obtained from small differences in their molecular structures. Indole is the parent substance of a large number of synthetic and natural compounds, such as plant and animal hormones. In the present study, we evaluate the insecticidalactivity of 20 new synthesized indole
Efficient synthesis of furo[3,4-b]indoles starting from the corresponding indole is reported. The first route involves derivatization, protection, and deprotection steps, which stretch the syntheses. The second method provides a shorter and more efficient strategy to accessing the furoindole. The innovation starts with alkylation at C-2 of the indole presenting at the C-3 position a ketone-acetal, followed by the cycloaromatization catalyzed by polymeric ion-exchange resins. The second route represents a significant improvement over other methods previously described. (C) 2011 Elsevier Ltd. All rights reserved.