PROCESSES FOR THE PREPARATION OF CEPHALOSPORIN DERIVATIVES
Provided is a process for preparing a compound of formula 1 or its salt. The process includes reacting a compound of formula 4 with acetaldehyde in a mixed solvent including water, isopropanol, and methylenechloride in a volume ratio of 1:3-6:11-14 in the
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Page/Page column 8
(2008/06/13)
PROCESSES FOR THE PREPARATION OF CEPHEM DERIVATIVES
Provided is a process for preparing a compound of formula 1 or its salt, which includes reacting a compound of formula 2 with a compound of formula 3 in the presence of a base.
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Page/Page column 18; 19
(2008/06/13)
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