Xanthates and Phosphites

Early work employing DMTST as the glycosyl promoter showed [27] that sialyl 2-xanthate 60 reacts with Gal acceptor 61 or 6 in acetonitrile to give predominantly 

It has been demonstrated that the a-o-glucopyranosyl acetonitrilium ions are stereospecifically generated from the corresponding oxocarbenium ions in dry ace- 

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