Polymer grafted layered double hydroxides (LDHs-g-POEGMA): a highly efficient reusable solid catalyst for the synthesis of chromene incorporated dihydroquinoline derivatives under solvent-free conditions

2016 ◽  
Vol 18 (15) ◽  
pp. 4228-4239 ◽  
Author(s):  
Mudumala Veeranarayana Reddy ◽  
Nguyen Thi Kim Lien ◽  
Gangireddy Chandra Sekhar Reddy ◽  
Kwon Taek Lim ◽  
Yeon Tae Jeong

Chromene incorporated dihydroquinolines are synthesized using highly active air stable and recyclable LDHs-g-POEGMA as catalyst in green procedure.

RSC Advances ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 1128-1133
Author(s):  
Xiaoming Wang ◽  
Xin Xu

Molecular zinc dihydrides were found to be highly efficient catalysts for the hydroboration of nitriles and imines at room temperature under solvent-free conditions.


2021 ◽  
Vol 76 (2) ◽  
pp. 85-90
Author(s):  
Abdolkarim Zare ◽  
Manije Dianat

Abstract A highly efficient and green protocol for the synthesis of pyrimido[4,5-b]quinolines has been described. The one-pot multicomponent reaction of dimedone with arylaldehydes and 6-amino-1,3-dimethyluracil in the presence of N,N-diethyl-N-sulfoethanaminium chloride ([Et3N–SO3H][Cl]) as an ionic liquid (IL) catalyst under solvent-free conditions afforded the mentioned compounds in high yields and short reaction times. Our protocol is superior to many of the reported protocols in terms of two or more of these factors: the reaction times, yields, conditions (solvent-free versus usage of organic solvents), temperature and catalyst amount.


RSC Advances ◽  
2021 ◽  
Vol 11 (46) ◽  
pp. 28711-28715
Author(s):  
Lin Bai ◽  
Shenglong Ding ◽  
Xiaofang Ma

This work provides a highly efficient and feasible strategy for the synthesis of symmetric methylene diesters, involving the direct diesterification of various carboxylates with 1,n-dihaloalkanes under solvent-free conditions.


Author(s):  
Jiahao Li ◽  
Minyi Yu ◽  
Zheng-Chao Duan ◽  
Haiyan Zhu ◽  
Wei Yao ◽  
...  

The development of highly active and efficient ligands is recognized to be crucial for catalytic applications of coordination polymers under specific conditions, such as solvent-free or in water. A new...


2017 ◽  
Vol 19 (22) ◽  
pp. 5396-5402 ◽  
Author(s):  
Zhi Tang ◽  
Qiutao Jiang ◽  
Lifen Peng ◽  
Xinhua Xu ◽  
Jie Li ◽  
...  

A highly efficient way for the direct (trans)esterification of acyl acids (esters) and alcohols in a strict 1 : 1 ratio using a zirconocene complex (1, 1 mol%), a strong Lewis acid of good water tolerance, as a catalyst under solvent-free conditions has been developed.


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