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Assessing the effectiveness of different chiral and achiral phosphoric acids in presence of thiourea co-catalyst in co-operative organocatalytic stereoselective glycosylation reactions

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Title Assessing the effectiveness of different chiral and achiral phosphoric acids in presence of thiourea co-catalyst in co-operative organocatalytic stereoselective glycosylation reactions
 
Creator Singh, Govind Pratap
Abirami, Raja
Gurung, Anup
 
Subject Chiral
Achiral
Thiourea
Phosphoric
Acids
Glycosylation
Organocatalysis
 
Description 1206-1215
Organocatalytic glycosylation reactions were attempted with an aim to achieve stereoselectivity using chiral TRIP (Binol derived phosphoric acid) and achiral biphenyl phosphoric acids as catalyst and a thiourea derivative as co-catalyst, based on the transition model suggested by Schmidt group[1] during co-operative organocatalysis. Though the stereoselectivity as reported by the Schmidt was not observed, but it was found that the thiourea co-catalyst assisted the catalyst in making the reaction faster, especially in the cases where the catalyst was itself not a strong enough acid.
 
Date 2020-10-05T08:49:10Z
2020-10-05T08:49:10Z
2020-08
 
Type Article
 
Identifier 0975-0983(Online); 0376-4699(Print)
http://nopr.niscair.res.in/handle/123456789/55436
 
Language en_US
 
Rights CC Attribution-Noncommercial-No Derivative Works 2.5 India
 
Publisher NISCAIR-CSIR, India
 
Source IJC-B Vol.59B(08) [August 2020]