9-Phenyl-10-methylacridinium: A Highly Efficient and Reusable Organocatalyst for Mild Aromatization of 1,4-Dihydropyridines by Molecular Oxygen
摘要:
The mild, efficient, and general aerobic aromatization of Hantzsch 1,4-dihydropyridines was realized at room temperature with 5 mol % of 9-phenyl-10-methylacridinium perchlorate as the photocatalyst, which could be easily recovered and reused.
Nano-zirconia as an excellent nano support for immobilization of sulfonic acid: a new, efficient and highly recyclable heterogeneous solid acid nanocatalyst for multicomponent reactions
作者:Ali Amoozadeh、Salman Rahmani、Mehrnoosh Bitaraf、Fatemeh Bolghan Abadi、Elham Tabrizian
DOI:10.1039/c5nj02430g
日期:——
Nano-zirconia-supported sulfonic acid as a novel, highly efficient and recyclable heterogeneous nanocatalyst is reported for the synthesis of multicomponent reactions.
报告了一种新型的、高效的、可回收的纳米催化剂——纳米氧化锆支撑的磺酸,用于合成多组分反应。
A molybdenum(VI) complex as an efficient catalyst for the synthesis of dihydropyridines
An efficient synthesis of various substituted Hantzsch-1,4-dihydropyridines and hexahydroquinolines, using a molybdenum(VI) complex as homogenous catalyst, from aldehydes, β-keto esters or cyclohexadiones and ammonium acetate in molten tetrabutyl ammonium bromide as an ionic liquid is described. This novel method consistently gave excellent yields (70–92%) and short reaction times (7–30 min).
Tetraethylammonium 2-(carbamoyl)benzoate as a bifunctional organocatalyst for one-pot synthesis of Hantzsch 1,4-dihydropyridine and polyhydroquinoline derivatives
作者:Mahsa Yarhosseini、Shahrzad Javanshir、Mohammad G. Dekamin、Mohammad Farhadnia
DOI:10.1007/s00706-016-1666-1
日期:2016.10
environment-friendly approach for the synthesis of biologically active Hantzsch1,4-dihydropyridine and polyhydroquinoline derivatives in the presence of tetraethylammonium 2-(carbamoyl)benzoate, as an effective bifunctional metal-free catalyst, has been developed via a one-pot multicomponent reaction of various aldehydes, ethyl acetoacetate or cyclic 1,3-dicarbonyl compounds, and ammonium acetate in EtOH
Hydroquinolines via the Hantzsch Reaction Promoted by SiO<sub>2</sub>-I
作者:Abdul Ahad、Maqdoom Farooqui
DOI:10.1080/00304948.2016.1206422
日期:2016.9.2
nano particles, metal triflates, thiazolium ion and ceric ammonium nitrate. However, several of these procedures suffer from some disadvantages such as hazardous catalysts or solvents, formation of by-products, prolonged reaction times, use of expensive metal precursors and high temperature conditions and in some cases, the need to use microwave or ultrasonic irradiation. However, some of the nano particles
Efficient One-Pot Synthesis of Polyhydroquinoline Derivatives Using Silica Sulfuric Acid as a Heterogeneous and Reusable Catalyst Under Conventional Heating and Energy-Saving Microwave Irradiation
作者:Akbar Mobinikhaledi、Naser Foroughifar、Mohammad Ali Bodaghi Fard、Hassan Moghanian、Sattar Ebrahimi、Mehdi Kalhor
DOI:10.1080/00397910802513060
日期:2009.3.10
Abstract An efficientHantzsch four-component condensation reaction for the synthesis of polyhydroquinoline derivatives was reported under two conditions: solvent-free conventional heating and energy-saving microwave irradiation. The process is simple and environmentally benign, and the use of a heterogeneous and reusable catalyst, high yields, and short reaction times are the key features of this