Novel clavam derivatives and methods of making same
申请人:Beecham Group plc
公开号:US04795809A1
公开(公告)日:1989-01-03
A compound having the formula (I): ##STR1## is described, together with salts thereof and an enzymatic process for converting such compounds into clavulanic acid. A process for the preparation of the compound of formula (I) and its salts is disclosed, together with intermediates for use therein. This process involves the use of a novel enzyme system to effect the desired cyclization, which enzyme system is preferably derived from a micro-organism, in particular a species of Streptomyces.
Studies on the biosynthesis of clavulanic acid. Part 5. Absolute stereochemistry of proclavaminic acid, the monocyclic biosynthetic precursor of clavulanic acid
作者:Keith H. Baggaley、Stephen W. Elson、Neville H. Nicholson、John T. Sime
DOI:10.1039/p19900001521
日期:——
carried out with enantiomericallypure threonine derivatives to confirm that the formation of the β-lactam moiety did not impair the integrity of the α- and β-chiral centres and that the enzymatic deacylation reaction was capable of resolving the α-centre of an α-amino-β-hydroxy acid. The enantiomeric purity of intermediates was determined using HPLC, 1H NMR spectroscopy utilising the chiral solvating reagents