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EP0649849A1 Process for the preparation of cephalosporins 失效
Verfahren zur Herstellung von Cephalosporinen。

Process for the preparation of cephalosporins
摘要:
A process for etherifying the hydroxymethyl group in position 3 of a cephalosporin by reaction of a 3-hydroxymethyl cephalosporin with an dioxycarbenium-tetrafluoroborate.
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