Disclosed herein is a process for preparing a compound having the formula ##STR1## which comprises coupling a compound having the formula ##STR2## or a salt thereof, with a compound having the formula ##STR3## to obtain a compound having the formula ##STR4## reacting that compound with 2-aminooxy-2-methylpropanoic acid, or a salt thereof, to obtain a compound having the formula ##STR5## and, if R is an amino protecting group, deprotecting that compound to yield the desired product; wherein R is hydrogen or an amino protecting group; R.sub.1 is hydrogen, methyl or ethyl; M.sup..sym. is an inorganic cation or a substituted ammonium ion; and M.sub.1.sup..sym. is hydrogen, an inorganic cation or a substituted ammonium ion.
The process of this invention provides for the conversion of amino acid amides having the formula ##STR1## to 3-amino-2-oxo-1-azetidinesulfonic acid salts having the formula ##STR2## wherein one of R.sub.2 and R.sub.3 is hydrogen and the other is hydrogen, alkyl, cycloalkyl, phenyl or substituted phenyl and M.sup..sym. is hydrogen or a cation.
Process for preparing (3S)-3-[[[2-(protected or unprotected
申请人:E. R. Squibb & Sons, Inc.
公开号:US04596777A1
公开(公告)日:1986-06-24
A compound having the formula ##STR1## can be prepared by enzymatically coupling a compound of the formula ##STR2## with a compound of the formula ##STR3## in the presence of Escherichia coli acylase at a pH of from about 4.0 to about 6.0.
Process for preparing (s)-3-amino-2-oxo-1-azetidinesulfonic acid salts
申请人:E. R. Squibb & Sons, Inc.
公开号:US04625022A1
公开(公告)日:1986-11-25
The process of this invention provides for the conversion of amino acid amides having the formula ##STR1## to 3-amino-2-oxo-1-azetidinesulfonic acid salts having the formula ##STR2## wherein one of R.sub.2 and R.sub.3 is hydrogen and the other is hydrogen, alkyl, cycloalkyl, phenyl or substituted phenyl and M.sup..sym. is hydrogen or a cation.