Azetidinone derivatives, a process for their preparation and their use as intermediates in the preparation of carbapenem antibiotics
申请人:SANKYO COMPANY LIMITED
公开号:EP0102239B1
公开(公告)日:1987-10-14
Azetidinone derivatives, a process for their preparation and their use
申请人:Sankyo Company, Limited
公开号:US05856556A1
公开(公告)日:1999-01-05
Compounds of formula (I): ##STR1## (wherein R.sup.1 represents hydrogen or a hydroxy-protecting group, R.sup.2 and R.sup.3 represent hydrogen, alkyl or aryl; R.sup.4 represents optionally substituted alkyl, alicyclic heterocyclic, aryl, aromatic heterocyclic, optionally substituted alkenyl or optionally substituted alkynyl; R.sup.5 represents hydrogen or a carboxy-protecting group; and R.sup.6 represents alkoxy, aryloxy, dialkylamino or diarylamino or two or R.sup.6 together represent o-phenylenedioxy or three together represent CH.sup.3 C(--CH.sub.2 O--).sub.3) may be prepared by reacting the corresponding carbonyl compound with a compound of formula P(R.sup.6).sub.3. Compounds (I) may be cyclised to prepare carbopenem derivatives, many of which have valuable antibiotic activity.