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:
An efficient method for the synthesis of a compound of formula (2) is disclosed which comprises reacting a 4-acyl-2-azetidinone with a titanium, zirconium or hafnium enolate of a 1-hydroxy-2-butanone derivative.
摘要:
The present invention relates to a compound represented by formula (1) or a salt thereof: wherein R represents a group that is easily removable upon hydrolysis in vivo. This compound is usable in the production of prodrug-type carbapenem antibacterial agents for oral administration. The use of this compound in the process of production of the antibacterial agents can realize enhanced production efficiency and reduced production cost.
摘要:
1-Methylcarbapenem derivatives of general formula (I) and pharmacologically acceptable salts and esters thereof, useful as the active ingredient of anti-Helicobacter pylori compositions (such as therapeutic or preventive agents for Helicobacter piloriinfections, particularly the therapeutic agents). In said formula, R1 is (IIa), (IIb), (IIc) or (IId), wherein R2 is hydrogen or alkyl; and R3 is hydrogen or alkyl.
摘要:
The subject of the present invention is a method of the preparation of compounds containing the core skeleton of carbapenem antibiotics, novel intermediate compounds used in this method, a method of the preparation of the intermediate compounds as well as the use of the intermediate compounds in the production of carbapenem antibiotics.
摘要:
The present invention relates to an improved method for synthesizing meropenem trihydrate [(1R,5S,6S)-2-[((2'S,4'S)-2'-dimethylaminocarbozyl)pyrrolidin-4'-ylthio]-6-[(R)-1-hydroxyethyl]-1-methylcarbapen-2-em-3-carboxylic acid, trihydrate], which is a novel carbapenem antibiotic.
摘要:
A carbapenem derivative having an R-configuration at the 5-position, represented by general formula (I), and optically active pyrrolidine derivatives represented by general formulae (XI) and (XII), all of these compounds serving as the intermediate for the synthesis of carbapenems as β-lactam antibiotics. In formula (I) R1 represents hydrogen or an organic group; and R2 represents hydrogen or a carboxyl protective group. In formulae (XI) and (XII) R1 represents benzyl; R2 represents alkyl; R3 represents alkyl, benzyl or allyl; R4 represents hydrogen, alkyl, vinyl, phenyl, benzyl or a heterocyclic group containing 1 to 4 nitrogen or/and oxygen atoms; and R5 represents hydrogen or methyl.
摘要:
A novel intermediate which is for use in efficiently producing a 1β-methylcarbapenem compound for oral administration; and a process for producing the intermediate. The process, which is for producing a novel β-lactam compound represented by the general formula (4), is characterized by reacting a β-lactam compound represented by the general formula (5) as a starting material with a compound represented by the general formula (6) in the presence of a base to obtain a novel β-lactam compound represented by the general formula (1), protecting the hydroxy group, subsequently cyclizing the protected compound in the presence of a strong base, reacting the cyclized compound with diphenylphosphoryl chloride to obtain a novel β-lactam compound represented by the general formula (3), and removing the protective group therefrom. (5) (6) (1) (3) (4) (In the formulae, R1 represents trimethylsilyl or triethylsilyl; R2 represents aryl or heteroaryl; R3 represents C1-10 alkyl or C3-10 cycloalkyl; and X represents halogeno.)
摘要:
Compounds of formula (Ia): in which: R 1 represents a hydrogen atom or a hydroxy-protecting group; R 2 represents a methyl group; R 3 represents a phenyl group which has a 2-substituent of formula -CYNR 5 R 6 and no further substituent or has one alkyl substituent, wherein Y represents an oxygen or sulphur atom, and R 5 and R 6 are the same or different and each represents an alkyl group, an aryl group, or R 5 and R 6 together with the nitrogen atom to which they are attached form a heterocyclic group; R 4 represents a hydrogen atom or an amino-protecting group; and Z represents a sulphur atom or an oxygen atom, are valuable intermediates in the preparation of carbapenem compounds and retain a desirable configuration during conversion to such carbapenem compounds.
摘要翻译:式(Ia)化合物:其中:R 1表示氢原子或羟基保护基; R 2表示甲基; R 3表示具有式-CYNR 5 R 6的2-取代基且不具有另外的取代基或具有一个烷基取代基的苯基,其中Y表示氧或硫原子,R 5和 R 6相同或不同,各自表示烷基,芳基或R 5和R 6与它们所连接的氮原子一起形成杂环基; R 4表示氢原子或氨基保护基; Z表示硫原子或氧原子,是制备碳青霉烯化合物的有价值的中间体,并且在转化成这种碳青霉烯化合物期间保持所需的构型。