[DE] VERFAHREN ZUR HERSTELLUNG VON UNSYMMETRISCHEN PHOSPHORSÄUREDIESTERN<br/>[EN] METHOD OF PREPARING UNSYMMETRICAL PHOSPHORIC ACID DIESTERS<br/>[FR] PROCEDE DE FABRICATION DE DIESTERS D'ACIDE PHOSPHORIQUE ASYMETRIQUES
申请人:BOEHRINGER MANNHEIM GMBH
公开号:WO1995020596A1
公开(公告)日:1995-08-03
(DE) Gegenstand der vorliegenden Erfindung ist ein Verfahren zur Herstellung von unsymmetrischen Phosphorsäurediestern. Das Verfahren ist dadurch gekennzeichnet, daß man einen Phosphorsäureester mit einer hydroxygruppenhaltigen Verbindung in Gegenwart eines Arylsulfonsäurechlorids und einer organischen Base kondensiert, nach der Hydrolyse den Eindampfrückstand mit einem organischen Lösungsmittel ausrührt, das entstandene Arylsulfonsäure-Pyridinsalz nahezu vollständig zur Kristallisation bringt und recycliert, das entstandene Lipidderivat durch Zugabe einer Erdalkali-Ionen-haltigen Lösung als schwerlösliches Salz fällt und isoliert, das schwerlösliche Salz durch Suspendieren in einem mit Wasser nicht mischbaren organischen Lösemittel und einer verdünnten wäßrigen Mineralsäure als freie Säure im organischen Lösemittel isoliert, gegebenenfalls das Rohprodukt durch präparative Chromatographie an einer RP-Phase reinigt und anschließend gegebenenfalls die freie Säure in ein beliebiges Salz überführt.(EN) The method proposed is characterized in that a phosphoric acid ester is condensed with a hydroxy-group-containing compound in the presence of an aryl sulphonic acid chloride and an organic base. Following hydrolysis, the evaporation residue is precipitated with an organic solvent, the arylsulphonic-acid/pyridine salt formed is almost completely crystallized out and recycled, the lipid derivative precipitated as a poorly soluble salt by the addition of a solution containing alkaline-earth ions and then isolated, the poorly soluble salt is suspended in an organic solvent which is immiscible with water and in a dilute aqueous mineral acid and isolated as the free acid in the organic solvent, the raw product being optionally purified by preparative chromatography using a reversed-phase column and, optionally, the free acid subsequently converted to any desired salt.(FR) L'invention a pour objet un procédé de fabrication de diesters d'acide phosphorique asymétriques. Ledit procédé est caractérisé par les étapes suivantes: condensation d'un ester d'acide phosphorique avec un composé renfermant des groupes hydroxyle en présence d'un chlorure d'arylacide sulfonique et d'une base organique; précipitation après hydrolyse du résidu d'évaporation avec un solvant organique, cristallisation quasi complète et recyclage, après hydrolyse, du sel de pyridine d'arylacide sulfonique, précipitation et isolation sous forme de sel difficilement soluble par addition d'une solution renfermant des ions alcalino-terreux, isolation du sel difficilement soluble par suspension dans un solvant organique non miscible à l'eau et dans un acide minéral, sous forme d'acide libre dans le solvant organique; le cas échéant purification du produit de base par chromatographie préparative en phase inverse puis transformation le cas échéant de l'acide libre en un sel quelconque.
Method of preparing 9-(2-hydroxyethoxymethyl)guanine which comprises preparing the compound ##STR1## wherein R and R.sup.1 are hydrogen, lower alkyl and phenyl and then hydrolyzing same. 9-(2-hydroxyethoxymethyl)guanine is useful as an antiviral.
Methods and compositions for treating viral infections and guanine
申请人:Burroughs Wellcome Co.
公开号:US04199574A1
公开(公告)日:1980-04-22
9-Hydroxyethoxymethyl (and related) derivatives of certain 6-, and 2,6-substituted purines have been discovered to have potent anti-viral activities. Novel compounds and their pharmaceutically acceptable salts, pharmaceutical formulation containing the compounds of this invention, and the treatment of viral infections with these formulations are all disclosed. 9-(2-hydroxyethoxymethyl) guanine and 2-amino-9-(2-hydroxyethoxymethyl)adenine are examples of especially active compounds of this invention.
9-Hydroxyethoxymethyl (and related) derivatives of certain 6-, and 2,6-substituted purines have been discovered to have potent anti-viral activities. Novel compounds and their pharmaceutically acceptable salts, pharmaceutical formulations containing the compounds of this invention, and the treatment of viral infections with these formulations are all disclosed. 9-(2-hydroxyethoxymethyl) guanine and 2-amino-9-(2-hydroxyethoxymethyl)adenine are examples of especially active compounds of this invention.
Process for the production of asymmetrical phosphoric acid diesters
申请人:Boehringer Mannheim GmbH
公开号:US05734042A1
公开(公告)日:1998-03-31
The present invention concerns a process for the production of asymmetrical phosphoric acid diesters. The process is characterized in that a phosphoric acid ester is condensed with a compound containing hydroxy groups in the presence of an arylsulfonic acid chloride and an organic base, the residue of evaporation is stirred out with an organic solvent after the hydrolysis, the arylsulfonic acid pyridine salt which forms is nearly completely crystallized and recycled, the lipid derivative that is formed is precipitated as a sparingly soluble salt by addition of a solution containing alkaline-earth ions and isolated, the sparingly soluble salt is isolated as the free acid in an organic solvent by suspension in a water-immiscible organic solvent and a dilute aqueous mineral acid, the crude product is purified if desired, by means of preparative chromatography on a RP phase and subsequently the free acid is converted if desired into any desired salt.