- Nano-BFn/cellulose: a bio-based nano-catalyst for synthesis of bio-active 7-hydroxycoumarins
-
Nano-BFn/cellulose as a modified bio-based nano-catalyst has been synthesized from nanocellulose and boron triflouride via very simple steps. This novel nano-catalyst exhibited many advantages in the synthesis of 7-hydroxycoumarins such as good
- Mirjalili, Bi Bi Fatemeh,Bamoniri, Abdolhamid,Fazeli-Attar, Seyede Azita
-
p. 839 - 851
(2022/01/20)
-
- 1-Nicotinoylbenzotriazole: A Convenient Tool for Site-Selective Protection of 5,7-Dihydroxycoumarins
-
1-Nicotinoylbenzotriazole (NicBt) was uncovered as an efficient protecting agent for the site-selective acylation of resorcinol-type phenolic groups with almost equal reactivity. The use of NicBt allows selective protection of the 7-OH group in 5,7-dihydr
- Charushin, Valery N.,Chupakhin, Oleg N.,Fatykhov, Ramil F.,Inyutina, Anna K.,Kartsev, Victor G.,Khalymbadzha, Igor A.,Slepukhin, Pavel A.
-
supporting information
p. 3617 - 3624
(2019/09/30)
-
- TETRIACYCLODIPYRANYL COUMARINS AND THE ANTI-HIV AND ANTI-TUBERCULOSIS USES THEREOF
-
The present invention relates to tctracyclodipyrano-coumarin compounds of general formula (I), wherein the substituents are defined herein. These compounds exihibit dual biological activities of anti human immunodeficiency virus type 1 (HIV-1) infection a
- -
-
Page/Page column 48
(2010/08/18)
-
- KAl(SO4)2·12H2O (alum) a reusable catalyst for the synthesis of some 4-substituted coumarins via Pechmann reaction under solvent-free conditions
-
A simple, efficient, and practical procedure for the Pechmann condensation using KAl(SO4)2·12H2O (alum) as a non-toxic, reusable, inexpensive, and easily available catalyst is described under solvent-free condition at 65°C. These improved reaction conditions allow the preparation of a wide variety of some new substituted coumarins in high yields (86-96%) and purity under mild reaction conditions. Compared to the classical Pechmann condensation, this new method consistently has the advantage of high yields.
- Azizian, Javad,Mohammadi, Ali A.,Bidar, Ilyar,Mirzaei, Peiman
-
experimental part
p. 805 - 808
(2009/09/25)
-
- Skeletal diversity construction via a branching synthetic strategy
-
A branching synthetic strategy was used to efficiently generate structurally diverse scaffolds, which span a broad area of chemical descriptor space, and their biological activity against MRSA was demonstrated. The Royal Society of Chemistry 2006.
- Wyatt, Emma E.,Fergus, Suzanne,Galloway, Warren R. J. D.,Bender, Andreas,Fox, David J.,Plowright, Alleyn T.,Jessiman, Alan S.,Welch, Martin,Spring, David R.
-
p. 3296 - 3298
(2008/09/19)
-
- Microwave initiated reactions: Pechmann coumarin synthesis, Biginelli reaction, and acylation
-
An energy-efficient protocol has been developed for solvent-free reactions that are mildly exothermic but not spontaneous. The exothermic reaction mixture-on several g-scale-is exposed for about 30 s to low power (about 200 W) microwaves and then the microwave oven is switched off. After this short burst of energy, the exothermic reaction gets initiated and proceeds on its own to completion. A number of coumarins were synthesized by the Pechmann reaction using this strategy.
- Manhas, Maghar S.,Ganguly, Subhendu N.,Mukherjee, Somdatta,Jain, Amit K.,Bose, Ajay K.
-
p. 2423 - 2425
(2007/10/03)
-