Practical and efficient synthesis of tetrahydrobenzo[b]pyran using caffeine supported on silica as an ionic liquid solid acid catalyst

2018 ◽  
Vol 15 (12) ◽  
pp. 2811-2819
Author(s):  
Mohammad Bakherad ◽  
Ali Keivanloo ◽  
Elmira Moradian ◽  
Amir H. Amin ◽  
Rahele Doosti ◽  
...  
2012 ◽  
Vol 65 (1) ◽  
pp. 86 ◽  
Author(s):  
Sunanda B. Phadtare ◽  
R. Vijayraghavan ◽  
Ganapati S. Shankarling ◽  
Douglas R. MacFarlane

An efficient method for the synthesis of substituted 2,3-dihydro-1H-perimidine derivatives is described using bis(oxalato)boric acid (HBOB) as catalyst. The methodology provides an easily handled and recyclable catalyst for this type of reaction as an alternative platform to the conventional acid-catalyzed thermal processes. The time required to complete the reaction using HBOB was found to be shorter than conventional methods. Recycling of the catalyst has been efficiently achieved using a simple procedure.


2019 ◽  
Vol 150 (5) ◽  
pp. 1373-1388 ◽  
Author(s):  
Qinghua Ji ◽  
Xiaojie Yu ◽  
Abu El-Gasim A. Yagoub ◽  
Mo Li ◽  
Olugbenga Abiola Fakayode ◽  
...  

2017 ◽  
Vol 174 ◽  
pp. 154-159 ◽  
Author(s):  
Wenqing Si ◽  
Yichen Li ◽  
Jie Zheng ◽  
Shun’an Wei ◽  
Dan Wang

RSC Advances ◽  
2015 ◽  
Vol 5 (103) ◽  
pp. 84621-84626 ◽  
Author(s):  
Peixue Wang ◽  
Shimin Liu ◽  
Feng Zhou ◽  
Benqun Yang ◽  
Ahmad S. Alshammari ◽  
...  

Efficient synthesis of diphenyl carbonate from dibutyl carbonate and phenol using square-shaped Zn–Ti–O nanoplates as solid acid catalyst.


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.


2017 ◽  
Vol 41 (20) ◽  
pp. 12293-12302 ◽  
Author(s):  
Farhad Panahi ◽  
Esmaeil Niknam ◽  
Samira Sarikhani ◽  
Fatemeh Haghighi ◽  
Ali Khalafi-Nezhad

An novel nano-magnetic solid acid catalyst was used for the efficient synthesis of new curcumin-based pyrano[2,3-d]pyrimidine derivatives via a multicomponent reaction under mild conditions.


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