One-Pot Efficient Synthesis of 2-Aryl-1-arylmethyl-1H-benzimidazoles and 2,4,5-Triaryl-1H-imidazoles Using Oxalic Acid Catalyst

Synthesis ◽  
2007 ◽  
Vol 2007 (18) ◽  
pp. 2829-2834 ◽  
Author(s):  
Nagnnath Kokare ◽  
Jaiprakash Sangshetti ◽  
Devanand Shinde
2014 ◽  
Vol 989-994 ◽  
pp. 83-86
Author(s):  
Xuan Yan Liu ◽  
Zhi Gao Yang

3,4-Dihydropyrimidin-2(1H)-ones derivatives were synthesized in moderate to high yields in one-pot three component reaction from the corresponding aldehydes, 1,3-dicarbonyl compounds and urea, Coconut shell char sulfonic acid (CSCSA) used as a reusable, and efficient catalyst. Compared to the classical acid catalyst, This new protocol for the Biginelli reaction includes the following important features: excellent yields, non-toxic, inexpensive and easily available reagent.


2013 ◽  
Vol 1 ◽  
pp. 194308921350716 ◽  
Author(s):  
Abbas Teimouri ◽  
Leila Ghorbanian

This study presents a simple highly versatile and efficient synthesis of various β-amino carbonyl compounds in the Mannich reaction of acetophenone with aromatic aldehydes and aromatic amines in the presence of nanosulfated zirconia, nanostructured ZnO, nano-γ-alumina, and nano-ZSM-5 zeolites as the catalyst in ethanol at moderate temperature. The optical properties of the nanostructured organic molecules were studied. The advantages of methods are short reaction times, milder conditions, easy workup, and purification of products by nonchromatographic methods. The catalysts can be recovered for the subsequent reactions and reused without any appreciable loss of efficiency.


2021 ◽  
Vol 18 ◽  
Author(s):  
Vinay Kumar K P ◽  
Vinti S P Rao ◽  
Jaganmohan C ◽  
Sandeep Mohanty ◽  
Jaydeep Kumar ◽  
...  

: An efficient one pot multicomponent synthesis of 3,4- dihydropyrimidin-2(1H)-ones has been developed from aldehyde bisulfite adducts, ethyl acetoacetate and urea using recyclable polymer supported sulfonic acid catalyst. This new method provides several advantages over previous synthesis including high product yields, commercially viable, minimal workup operations and sustainable chemical practices.


2013 ◽  
Vol 16 (10) ◽  
pp. 788-790
Author(s):  
Zinatossadat Hossaini ◽  
Samereh Seyfi ◽  
Faramarz Rostami-Charati ◽  
Mehdi Ghambarian

2020 ◽  
Vol 17 ◽  
Author(s):  
Kalyani K. ◽  
Srinivasa Reddy Kallam

Abstract:: An efficient synthesis of 2-substituted Quinazolin-4(3H)-ones has been developed from isatoic anhydride with various amidoximes by using recyclable polymer supported sulphonic acid catalyst. Excellent functional group compatibil-ity and high yields are the important features of this protocol.


2019 ◽  
Vol 9 (6) ◽  
pp. 1333-1339 ◽  
Author(s):  
Hua Lin ◽  
Shijie He ◽  
Dingyu Liu ◽  
Jian Zou ◽  
Lu Li ◽  
...  

Sign in / Sign up

Export Citation Format

Share Document