Preparation of 1'-ethoxycarbonyl-oxyethyl esters of penicillins
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United States of America Patent
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Dec 26, 1989
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app pub date -
Mar 26, 1987
filing date -
Jan 7, 1983
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Abstract
Process for the preparation of 1'-ethoxy carbonyloxy ethyl esters of penicillins, wherein a compound of the formula ##STR1## in which A is phenyl, phenoxy or 4-hydroxyphenyl, B is hydrogen, an amino group or a protected amino group and Z is hydrogen or a cation selected from the group of alkali metal, tri (lower alkyl ) ammonium and tetra (lower alkyl) ammonium, is reacted with 1-bromoethyl ethyl carbonate in an organic solvent and when B is a protected amino group the protecting group is split off to yield a primary amino group. There are also provided novel compounds of the formula ##STR2## in which Ph is phenyl and R is CH.sub.3 -- or C.sub.2 H.sub.5 --.
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