摘要:
The invention describes an improved process for synthesizing 1-β-methyl-2-hydroxymethyl substituted carbapenems as key intermediates for the synthesis of anti-MRSA carbapenem antibiotics. The synthesis eliminates the use of BU3SnCH2OH and HMPA, which are toxic substances and not amenable to industrial scale production. The novel intermediates are also within the scope of this invention.
标题翻译:聚合物MIT EINER CARBONGRUPPE,VERFAHREN ZUR HERSTELLUNG DAVON UND VERWENDUNG DAVON,VERFAHREN ZUR HERSTELLUNG EINESGETRÄGERTENKATALYSATORS UND VON ANTIBIOTISCHEN PENEM-ZWISCHENPRODUKTEN
摘要:
A polymer containing a carboxyl group, a preparation method and an application thereof, a supported catalyst and a preparation method thereof and preparation methods of a penem antibiotic intermediate are disclosed. The polymer is prepared by polymerizing three monomers with different structures. The carboxyl group-containing polymer is a cross-linked polymer, and a polymer chain contains a large number of benzene rings, which can improve the rigidity and hardness of the polymer, thus effectively improving the mechanical properties of the polymer. Meanwhile, in the polymer, the carboxyl group is used as a main functional group, and is used as a carrier to prepare, by means of a coordination reaction between the carboxyl group and a heavy metal, a supported metal catalyst which has better connection stability between the metal and the polymer. The above two factors can improve the stability of the supported metal catalyst, such that the catalyst can be recycled without losing the catalytic activity. Meanwhile, loss of a heavy metal active ingredient and production cost can be reduced.
摘要:
Chromogenic or fluorescent carbapenems according to formula I, wherein Ar is a mono or disubstituted carbocyclic aromatic group or an optionally mono or disubstituted heterocyclic aromatic group, are useful compounds for the detection of bacterial carbapenemase.
摘要:
A process for producing either a carbapenem-type antibacterial (4) having a 1-alkylpyrrolidine structure or a salt thereof, the process being shown by the following reaction formula; a compound represented by the formula (1) or a salt thereof which are useful intermediates therefor; and a process for producing the compound or salt. (1) → (4). In the formula, R1 represents C¿1-3? alkyl, and R?2 and R3¿ each independently represents hydrogen, etc.
摘要:
A process for the preparation of a carbapenem-type antibacterial agent of formula (4) having a 1-alkylpyrrolidine structure or a salt thereof, a useful synthetic intermediate of formula (1) or a salt thereof, and a process for the preparation thereof: [wherein R 1 represents a C 1 -C 3 alkyl group, R 2 and R 3 each independently represents a hydrogen atom or the like].
摘要:
Novel crystalline carbapenem intermediate compounds of formula (I) wherein R1 represents CH3 or H; and P and P' independently represent H or a protecting group; and efficient process for synthesis thereof.
摘要:
The present invention relates to an improved process for the preparation of the carbapenem antibiotic of formula (I) or its salts, hydrates and esters. The present invention further provides novel crystalline form of compound of general formula (III), wherein R 3 is p-nitrobenzyloxy carbonyl.