371123-22-7Relevant articles and documents
Pseudo-enantiomeric carbohydrate-based N-heterocyclic carbenes as promising chiral ligands for enantiotopic discrimination
Bower, John F.,Galan, M. Carmen,Henderson, Alexander S.
supporting information, p. 3012 - 3016 (2020/05/08)
The practical synthesis of carbohydrate-based NHC-Rh complexes bearing C1 or C3 sterically differentiated positions, accessed by glycosylation or SNAr strategies, is reported. These catalysts exhibit pseudo-enantiomeric behaviour in the hydrosilylation of acetophenone. We show that steric bulk at C1 gives preference for (S)-phenyl-1-ethanol, while bulk at C3 leads to the (R)-enantiomer. These results represent the first example of pseudo-enantiomeric carbohydrate-based NHC ligands leading to enantiotopic discrimination.
Synthesis and scalable conversion of L-iduronamides to heparin-related Di- and tetrasaccharides
Hansen, Steen U.,Miller, Gavin J.,Barath, Marek,Broberg, Karl R.,Avizienyte, Egle,Helliwell, Madeleine,Raftery, James,Jayson, Gordon C.,Gardiner, John M.
, p. 7823 - 7843 (2013/01/15)
A diastereomerically pure cyanohydrin, preparable on kilogram scale, is efficiently converted in one step into a novel L-iduronamide. A new regioselective acylation of this iduronamide and a new mild amide hydrolysis method mediated by amyl nitrite enable
Synthesis of a library of stereo- and regiochemically diverse aminoglycoside derivatives
Clique, Blandine,Ironmonger, Alan,Whittaker, Benjamin,Colley, Jacqueline,Titchmarsh, James,Stockley, Peter,Nelson, Adam
, p. 2776 - 2785 (2007/10/03)
A library of forty modified aminoglycosides was prepared in which the configuration and regiochemistry of two or three rings was widely varied. The library was based around three core ring systems: the 2-deoxystreptamine ring system found in the natural products, and both enantiomers of (1R*,2R*,4R*,5R*)-2,5-diamino-cyclohexane-1,4-diol and (1R*,3R*,4R*,6R*)-4,6-diaminocyclohexane-1,3-diol. In each case, the core was modified by glycosylation with one or two sugar rings. The absolute configuration of the sugar substituents (D or L), the configuration of the anomeric centres (α or β), and the regiochemical arrangement of the amine(s) were varied. The Royal Society of Chemistry 2005.