- Synthesis method and application of amoxicillin and sulbactam hybrid molecule
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The invention discloses a synthesis method and application of an amoxicillin and sulbactam hybrid molecule, and belongs to the technical field of organic synthesis. According to the method, chlorobromomethane is used as a chloromethyl reagent of sulbactam acid, so that the yield of a key intermediate sulbactam chloromethyl ester is effectively increased, and sulbactam chloromethyl ester and (Z)-6-(2-(4-hydroxyphenyl)-2-((4-methoxy-4-oxobutyl-2-ene-2-yl) amino) acetamido)-3, 3'-dihydroxyl-7-oxo-4-sulfo-1-azabicyclo[3.2.0]heptane-2-carboxylic acid as a raw material to carry out condensation reaction, and a protecting group is removed by using strong acid, so as to prepare the amoxicillin and sulbactam hybrid molecule. The synthesis method has the advantages of mild reaction conditions, cheap and easily available raw materials, low preparation cost, good safety, simple and feasible process and high product yield.
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- 1,1-dioxopenicillanoyloxymethyl D-6-[alpha(methyleneamino)-phenyl-acetamidol]-penicillanate and a process for the preparation thereof
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A pharmaceutical compound which comprises reacting the sodium penicillanic acid 1,1-dioxides with chloroiodomethane in the presence of a solvent to produce chloromethylpenicillanate 1,1-dioxides, reacting the chloromethylpenicillanate 1,1-dioxides with a sodium iodide to produce iodomethylpenicillanate 1,1-dioxides, and reacting the iodomethylpenicillanate 1,1-dioxide with sodium methampicillin and is effective in the treatment of bacterial infections in a mammal.
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- Antibacterial 6'-(2-amino-2-[4-acyloxyphenyl]acetamido)penicillanoyloxymethyl penicillanate 1,1-dioxide compounds
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6-(2-Amino-2-[4-acyloxyphenyl]acetamido)penicillanoyloxymethyl esters of penicillanic acid 1,1-dioxide are useful as antibacterial agents. Derivatives of the aforesaid antibacterial agents which have an amino protecting group on the amino function in the 2-amino-2-(4-acyloxyphenyl)acetamido side chain are useful intermediates to the antibacterial agents themselves.
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- Crystalline benzenesulfonate salts of sultamicillin
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Novel benzenesulfonic acid addition salts of sultamicillin of the formula STR1 and hydrated forms thereof, where X is hydrogen or chloro, especially the crystalline dihydrate salts, having advantages over the prior art forms of sultamicillin in pharmaceutical dosage forms, most particularly those for use in pediatric medicine, method for their use and pharmaceutical compositions thereof.
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- 1,1-Alkanediol dicarboxylate linked antibacterial agents
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Useful antibacterial agents in which a penicillin and/or a beta-lactamase inhibitor are linked via 1,1-alkanediol dicarboxylates are of the formula STR1 where A is the residue of certain dicarboxyic acids, R3 is H or (C1 -C3), n is zero or 1 such that when n is zero R is P or B and R1 is the residue of certain esters, H or a salt thereof; and when n is 1, one of R and R1 is P and the other is B, and P is STR2 where R2 is H or certain acyl groups, and B is the residue of a beta-lactamase inhibiting carboxylic acid; a method for their use, pharmaceutical compositions thereof and intermediates useful in their production.
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- Bis-esters of dicarboxylic acids with amoxicillin and certain hydroxymethylpenicillanate 1,1-dioxides
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Antibacterial bis-esters of 1,4-cyclohexanedicarboxylic acids and alkane dicarboxylic acids wherein the ester moieties are derived from different alcohols; one alcohol being hydroxymethylpenicillanate 1,1-dioxide, or the 6-beta-hydroxymethyl or the 6-alpha-aminomethyl derivative thereof; and the other being 6-[D-(2-amino-2-(p-hydroxyphenyl)acetamido)]penicillanic acid (amoxicillin); and pharmaceutically acceptable salts thereof; a method for the use of said esters and their salts, and methods for their preparation.
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- Process for 6'-amino-penicillanoyloxymethyl penicillanate 1,1-dioxide
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6'-Aminopenicillanoyloxymethyl penicillanate 1,1-dioxide is prepared by a two-step procedure. The first step consists of coupling a salt of a 6-(protected amino)penicillanic acid with a halomethyl, an alkylsulfonyloxymethyl or an arylsulfonyloxymethyl ester of penicillanic acid 1,1-dioxide, to give a 6'-(protected amino)penicillanoyloxymethyl penicillanate 1,1-dioxide, wherein the protection at the 6-position has been achieved by coupling the 6-aminopenicillanic acid with a beta-dicarbonyl compound. The second step consists of removal of the protecting group on the 6'-amino group, using aqueous acid. 6'-Aminopenicillanoyloxymethyl penicillanate 1,1-dioxide is a chemical intermediate for preparing antibacterial agents. Also claimed are the 6'-(protected amino)penicillanoyloxymethyl penicillanate 1,1-dioxide compounds used as intermediates in the process of this invention.
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- Process for the preparation of penicillanic acid esters
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A process for the preparation of chloromethyl esters of penicillanic acids, using iodochloromethane or bromochloromethane and a tetraalkylammonium salt of the penicillanic acid, and their use in processes for the synthesis of penicillanic acid esters, using a halomethyl ester and the tetraalkylammonium salt of the penicillanic acid, which readily hydrolyze in vivo to antibacterial penicillins and the beta-lactamase inhibitor penicillanic acid sulfone.
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- 6-Amidinopenicillanic acid derivatives including the radical of a β-lactamase inhibitor
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The present invention relates to hitherto unknown compounds of the general formula I: STR1 in which R1 stands for a five- to ten-membered azacycloalkyl or azabicycloalkyl residue attached via the nitrogen atom and optionally being substituted by one or two, the same or different, lower alkyl groups; R2 represents a hydrogen atom or a lower alkyl, aryl, or aralkyl radical; and A represents a radical of a β-lactamase inhibitor containing a β-lactam ring as well as a carboxy group, A being connected via the carboxy group. The present compounds are useful in the treatment of bacterial infections. The new compounds are in particular strongly active against β-lactamase producing bacteria.
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