申请人:Tanabe Seiyaku Co., Ltd.
公开号:US05359059A1
公开(公告)日:1994-10-25
Process for preparing carbapenem derivative of the formula [I], which comprises subjecting azetidinone compound of the formula [II] to intramolecular cyclization reaction together with elimination reaction of the group of --SR.sup.4, followed by re-adding said group of --SR.sup.4 to the 2-position of the carbapenem skeleton of the intramolecularly cyclized compound, which is industrially useful as process for preparing carbapenem antimicrobials or synthetic intermediate therefor. ##STR1## wherein R.sup.1 is protected or unprotected hydroxy-substituted lower alkyl group, R.sup.2 is hydrogen atom or ester residue, R.sup.3 is hydrogen atom or lower alkyl group, and the group of --SR.sup.4 is group which can be used as substituent at 2-position of the carbapenem antimicrobials.
制备公式[I]的碳青霉烯衍生物的过程包括将公式[II]的氮杂四元环化合物进行分子内环化反应和--SR.sup.4基团的消除反应,然后将--SR.sup.4基团重新加到分子内环化化合物的碳青霉烯骨架的2位上,该过程在工业上用于制备碳青霉烯抗微生物药物或其合成中间体。其中R.sup.1是保护或未保护的羟基取代的低碳基基团,R.sup.2是氢原子或酯基残基,R.sup.3是氢原子或低碳基基团,--SR.sup.4基团是可用作碳青霉烯抗微生物药物2位取代基团的基团。