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Showing 1 to 4 of 4 for “"Staudinger reactions"”.
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Auxiliares quirales derivados de carbohidratos: Nuevas aplicaciones
… derivatives as chiral auxiliaries in reactions of interest because of the biological and/or synthetical importance of their products. We have studied the use of acyclic derivatives of glycals as well as butane-2,3-diacetals of glyceraldehyde as chiral auxiliaries in Pauson-Khand and …
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Regioselective synthesis of curdlan derivatives
… iminophosphorane intermediate generated during Staudinger reactions was further investigated for subsequent syntheses: i) 6-amino or 6-amido-6-deoxycurdlan by in situ reaction with water or excess carboxylic anhydride, ii) 6-monoalkylamino curdlan by reductive amination using aldehydes and …
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Exploring the Chemistry of Bis(azido)phosphine Chalcogenides and the Pursuit of Isolable Phosphinidene Chalcogenides
… and their participation in chemoselective Staudinger reactions with secondary or tertiary phosphines to produce chiral phosphines. A tautomeric equilibrium of species was analyzed by 31P-31P nuclear Overhauser effect spectroscopy (NOESY). Thermogravimetric analysis (TGA) provided insights …
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Regioselective Synthesis of Polysaccharide-based Polyelectrolytes
… curdlan esters via regioselective ring-opening reactions catalyzed by triphenylphosphine (Ph3P) under mild conditions. Curdlan, a polysaccharide used by the food industry and in biomedical applications, was employed as starting material for preparing these carboxyl-containing derivatives by a …