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Priority claimed from GB4189775Aexternal-prioritypatent/GB1565209A/en
Application filed by Beecham Group LtdfiledCriticalBeecham Group Ltd
Publication of SE8005661LpublicationCriticalpatent/SE8005661L/en
C07D503/00—Heterocyclic compounds containing 4-oxa-1-azabicyclo [3.2.0] heptane ring systems, i.e. compounds containing a ring system of the formula:, e.g. oxapenicillins, clavulanic acid derivatives; Such ring systems being further condensed, e.g. 2,3-condensed with an oxygen-, nitrogen- or sulfur-containing hetero ring
C07D503/02—Preparation
C07D503/06—Preparation from compounds already containing the ring or condensed ring systems, e.g. by dehydrogenation of the ring, by introduction, elimination or modification of substituents
Abstract
PATENTERAV 1.forfarande fOr framstdllning no en forening med forme1n (II) PATENTER 1. A process for the preparation of a compound of formula (II)
Claims (1)
PATENTERAVPATENTERAV1. forfarande fOr framstdllning no en forening med forme1n (II) CH2 - 0 - R CO2A van i R dr on inert organisk grupp med,upp Lill 18 kolatcmer eshAdr on karbexylsyraestergrupp, kdnnetecknat ddrav, att man fOretrar on forening Ted formeln (I), CH2OH (I) 'CO? eller ett acylderivat dEcay, till'biadning av en ester mod for-mein (II).1. A process for the preparation of a compound of formula (II) CH2 - 0 - R CO2A van in R dr on an inert organic group with, up to 18 carbon atoms a carbexylic acid ester group, characterized in the form of a compound of formula (I) , CH2OH (I) 'CO? or an acyl derivative dEcay, to give an ester mod form (II).
SE8005661A1975-10-131980-08-11
PROCEDURE FOR THE PREPARATION OF CLAVULANIC ACID ESTERS
SE8005661L
(en)