摘要:
An industrially excellent novel process for the preparation of addition salts of basic antibiotics with inorganic acids (such as hydrochloric acid), by subjecting a basic antibiotic-oxalic acid addition salt (II) to salt-exchange with an inorganic acid salt (III) of an alkaline earth metal, wherein A is a basic antibiotic; R10 is a protected functional group to be used in organic synthesis; Ak-E is an alkaline earth metal; and B is an inorganic acid; carbapenem derivative-oxalic acid addition salts represented by general formula (II-I) and being useful as intermediates for the preparation of hydrochlorides of antimicrobial agents; and a process for preparing the same, (II-I) wherein A is a three- to seven-membered ring having at least one nitrogen atom; R1 is hydrogen or the like; R?2 and R5¿ are each hydrogen or a protecting group; R3 is a protecting group; R4 is hydrogen or the like; and R6 is hydrogen or the like.
摘要:
A process for synthesizing a coumpond of formula (I) or a pharmaceutically acceptable salt or ester thereof, wherein each P independently represents H or a protecting group, and R?1 and R2¿ independently represent H, C¿1-10? alkyl, aryl or heteroaryl, or substituted C1-10 alkyl, aryl or heteroaryl, comprising: reacting the compounds (II) or a pharmaceutically acceptable salt or ester thereof, and (III) or a pharmaceutically acceptable salt or ester thereof, wherein X represents OP(O)(OR)2, or OSO2R, wherein R represents C1-6 alkyl, aryl or perfluoro C1-6 alkyl, in the presence of an amine selected from the group consisting of: diisopropylamine (DIPA), dicyclohexylamine (DCHA), 2,2,6,6-tetramethylpiperidine (TMP), 1,1,3,3-tetramethylguanidine (TMG), 1,8-diazabicyclo[4.3.0]undec-7-ene (DBU) and 1,5-diazabicyclo[4.3.0]non-5-ene to produce a compound of formula (I).
摘要:
Verfahren zur Herstellung eines Carbapenems oder dessen Vorstufe (I) durch Abspaltung einer oder mehrerer Schutzgruppen einer Substanz (II).
enthaltend die Schritte: a) Hydrierung mit Wasserstoff eines Reaktionsgemisches (1) enthaltend die Substanz (II), mindestens ein organisches Lösungsmittel und mindestens ein aromatisches Amin in Gegenwart eines heterogenen Hydrierkatalysators unter Bildung eines Produktgemisches (1), b) Abtrennung des heterogenen Katalysators aus dem Produktgemisch (1) unter Bildung eines Produktgemisches (2), c) Hinzufügen von Wasser zum Produktgemisch (2), wobei das Gewichtsverhältnis von zugegebenem Wasser zum Produktgemisch (2) von 0,1 bis 10 ist, d) Thermische Behandlung des Produktgemisches (II) unter Bildung eines Produktgemisches (3) enthaltend Substanz (I).
摘要:
A process for the preparation of carbapenem antibiotics, which is free from the two disadvantages: (1) use of column chromatography and (2) recovery of a difficulty soluble salt and by which the objective compounds can be efficiently prepared in a short period. Specifically, a process for the preparation of compounds represented by the general formula (IV), salts thereof, or hydrates of both, characterized by reacting a compound represented by the general formula (I) with a compound represented by the general formula (II): X-H (wherein X is a member selected from the group consisting of substituents represented by the formulae (X-1) to (X-8)) to thereby obtain a compound represented by the general formula (III) or salt thereof, converting the compound (III) or salt thereof into a compound represented by the general formula (IV) or a salt thereof through the removal of the protecting group (R3), and purifying the compound (IV) or salt thereof by crystallization.
摘要:
The present invention relates to the preparation of compounds, in particular to the preparation of compounds which may be used as intermediates for the preparation of antibiotics, preferably carbapenem antibiotics, more preferably ertapenem, and salts thereof.
摘要:
A process for the preparation of carbapenem antibiotics, which is freed from the two disadvantages: (1) use of column chromatography and (2) recovery of a difficultly soluble salt and by which the objective compounds can be efficiently prepared in a short period. Specifically, a process for the preparation of compounds represented by the general formula (IV), salts thereof, or hydrates of both, characterized by reacting a compound represented by the general formula (I) with a compound represented by the general formula (II): X - H (wherein X is a member selected from the group consisting of substituents represented by the formulae (X-1) to (X-8)) to thereby obtain a compound represented by the general formula (III) or a salt thereof, converting the compound (III) or salt thereof into a compound represented by the general formula (IV) or a salt thereof through the removal of the protective group (R3), and purifying the compounds (IV) or salt thereof by crystallization. (I) (X-1) (X-2) (X-3) (X-4) (X-5) (X-6) (X-7) (X-8) (III) (IV)
摘要:
A β-methylcarbapenem compound of formula (I), a salt or an ester thereof, a process for the preparation thereof and a pharmaceutical composition containing same, wherein R1 is a C¿1-16? alkyl, C1-16 alkenyl, cycloalkyl, aryl or heterocyclic aryl group.