120312-07-4Relevant academic research and scientific papers
Electrochemical Oxidation of Proline Derivatives: Total Syntheses of Bulgecinine and Bulgecin C
Barrett, Anthony G. M.,Pilipauskas, Daniel
, p. 2787 - 2800 (2007/10/02)
The influence of structure on the efficiency of the electrochemical C-5 oxidation of (2S,4S)-hydroxyproline carbamate esters is presented.Optimum methoxylation was observed with (2S,4S)-4-acetoxy-1,2-pyrrolidine-dicarboxylic acid 2-methyl 1-(2-(trimethylsilyl)ethyl) ester (19).The corresponding C-5 methoxy derivative 20 was converted into bulgecinine (4) via a stereospecific radical homologation to incorporate the C-5 hydroxymethyl substituent.Bulgecin C (1c) was prepared via a β-stereoselective glycosidation reaction using a 2-azido-2-deoxy-α-D-glucopyranosyl trichloroacetimidate derivative, regiospecific C-4' sulfation, and deprotection.
Glycosyl Imidates, 41. - 6-O-Benzyl-Protected Muramic Acid as Glycosyl Acceptor. - Synthesis of the GlcNAc-β-(1->4)MurNAc Disaccharide
Termin, Andreas,Schmidt, Richard R.
, p. 789 - 796 (2007/10/02)
The α-trichloroacetimidates 1 and 2 as glucosamine donors afford with the 6-O-benzyl-protected muramic acid 6a as acceptor the β-connected disaccharides 14 and 15, respectively, in high yields.Compound 14 furnishes by cleavage of the TBDMS group, transfor
