Antibacterial compounds of the formula ##STR1## wherein n is 0 or 1, R is hydrogen or a radical forming an ester hydrolyzable under physiological conditions, and R.sup.1 is hydrogen or methyl; the pharmaceuticallyacceptable cationic salts thereof when R is hydrogen; pharmaceutical compositions thereof; a method of treating bacterial infections therewith; and intermediates useful in the synthesis of said compounds.
Reduction of carbonyl compounds using the carbonyl reductase of kluyveromyces marxianus
申请人:Korea Institute of Science and Technology
公开号:US20030139464A1
公开(公告)日:2003-07-24
A compound represented by a genera formula (Ia) or (Ib) and a stereo-selective preparation method thereof using a carbonyl reductase which is separated from
Kluyveromyces marxianus
. The compound can be prepared by reduction of substituted &bgr;-keto ester and can be used as an intermediate in preparing &bgr;-lactam group antibiotics.
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