A New Strategy for the One Pot Synthesis of (Aryloxyimino)Ethylcoumarins Promoted by CuCl2

2012 ◽  
Vol 36 (1) ◽  
pp. 5-8 ◽  
Author(s):  
Gargi Pal ◽  
Pranabes Bhattacharyya ◽  
Arunima Medda ◽  
Asish R. Das
2002 ◽  
Vol 80 (8) ◽  
pp. 1051-1054 ◽  
Author(s):  
Zhiyuan Zhang ◽  
Kenichi Niikura ◽  
Xue-Fei Huang ◽  
Chi-Huey Wong

A new strategy has been developed for the synthesis of branched sialylated oligosaccharides using one-pot technology. Sialyl donors are in general too weak in reactivity to be used as the first glycosyl donors in the one-pot synthesis. When sialic acid is linked to a different sugar such as galactose, the reactivity is, however, significantly enhanced and can be tuned to enable the one-pot synthesis. A combination of NIS–TfOH–AgOTf was used for activation of the thioglycosides to improve the glycosylation yield when a hindered acceptor was used, as illustrated in the one-pot assembly of sialylated hexasaccharide.Key words: one-pot synthesis, sialyl oligosaccharides, new activation.


ChemInform ◽  
2012 ◽  
Vol 43 (25) ◽  
pp. no-no
Author(s):  
Gargi Pal ◽  
Pranabes Bhattacharyya ◽  
Arunima Medda ◽  
Asish R. Das

2020 ◽  
Vol 24 (20) ◽  
pp. 2341-2355
Author(s):  
Thaipparambil Aneeja ◽  
Sankaran Radhika ◽  
Mohan Neetha ◽  
Gopinathan Anilkumar

One-pot syntheses are a simple, efficient and easy methodology, which are widely used for the synthesis of organic compounds. Imidazoline is a valuable heterocyclic moiety used as a synthetic intermediate, chiral auxiliary, chiral catalyst and a ligand for asymmetric catalysis. Imidazole is a fundamental unit of biomolecules that can be easily prepared from imidazolines. The one-pot method is an impressive approach to synthesize organic compounds as it minimizes the reaction time, separation procedures, and ecological impact. Many significant one-pot methods such as N-bromosuccinimide mediated reaction, ring-opening of tetrahydrofuran, triflic anhydrate mediated reaction, etc. were reported for imidazoline synthesis. This review describes an overview of the one-pot synthesis of imidazolines and covers literature up to 2020.


2001 ◽  
Vol 2001 (4) ◽  
pp. 160-161 ◽  
Author(s):  
Hongyun Guo ◽  
Yunfa Zheng ◽  
Yongmin Zhang

α-Selenonitriles, α-selenoesters, and asymmetrical selenides can be readily obtained from the one-pot reaction of diselenides and active organic halides by a Sm/ZnCl2 system in DMF-H2O.


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