On June 22, 2020, Soares-Paulino, Antonio Augusto; Stefani, Helio A. published an article.Name: (2R,3S,4R)-2-(Acetoxymethyl)-3,4-dihydro-2H-pyran-3,4-diyl diacetate The title of the article was Synthesis of Diverse C2-Glyco-Acyl Azides and -Ureas by Palladium-Catalyzed Carbonylation Coupling of 2-Iodoglycals. And the article contained the following:
Herein, we describe the synthesis of acyl azides and acyl urea glycals, a new class of C-2 branched glycoconjugates, employing Pd-catalyzed carbonylative coupling. A new strategy was developed to obtain acyl azides by carbonylative coupling between 2-iodo-glycals and NaN3 catalyzed by Pd(dba)2/Xantphos and carbon monoxide as a carbonyl source. Acyl azide glycals were used as synthetic intermediates in obtaining new acyl urea glycals via carbonylative coupling catalyzed by Pd(OAc)2 and 1,10-Phen. Different glycal substrates, including disaccharide-type, were studied, and various acyl azides and acyl ureas were prepared Reaction yields were moderate to high (31-99%) and reaction time varying from short to long (0.5-20 h). The experimental process involved the reaction of (2R,3S,4R)-2-(Acetoxymethyl)-3,4-dihydro-2H-pyran-3,4-diyl diacetate(cas: 2873-29-2).Name: (2R,3S,4R)-2-(Acetoxymethyl)-3,4-dihydro-2H-pyran-3,4-diyl diacetate
The Article related to iodoglycal coupling glycoconjugate urea glycal azide carbonylation catalyst disaccharide, solvent effect acyl azide urea synthesis palladium catalyzed carbonylation, Carbohydrates: Oligosaccharides and other aspects.Name: (2R,3S,4R)-2-(Acetoxymethyl)-3,4-dihydro-2H-pyran-3,4-diyl diacetate
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