Process for the preparation of 2-(primary/secondary amino)hydrocarbyl)- carbamoyl-7-oxo-2,6-diaza-bicyclo[3.2.0.]heptane-6-sulfonic acid derivatives

摘要

A process for the production of a compound of formula (I) wherein ALINKERB represents a linker moiety of formula (V): A[G1-G2*-G3]B; wherein A and B indicate the orientation of the group of formula (V) in formula (I); G1, G2 and G3 have specific meanings described herein and may be present or absent, with the proviso that at least one of G1 or G3 is present; which linker group may furthermore optionally contain one or more groups of formula (VI); and/or other substituents; and R1 represents hydrogen or a C1-C4-alkyl group; R2 represents hydrogen or a C1-C4-alkyl group; R3 independently at each occurrence, represents hydrogen or a C1-C4-alkyl group; x is 0 or 1; y is 0 or 1; z independently at each occurrence, is 0 or 1; and (—) represents a single bond between a primary, secondary or tertiary carbon atom of the moiety ALINKERB and the adjacent nitrogen atom; in which process (A) a compound of formula (II) is reacted with a compound of formula (III) wherein Pr represents an amino protecting group selected from t-butyloxy carbonyl (t-Boc), 1-methyl-1-(4-biphenylyl)ethyloxy carbonyl (Bpoc), 1-(1-adamantyl)-1-methylethyloxy carbonyl (Adpoc), 1-(3,5-di-t-butylphenyl)-1-methylethyloxy carbonyl (t-Bumeoc), 1-adamantyloxy carbonyl (Adoc), p-methoxybenzyloxy carbonyl (Moz), o,p-dimethoxybenzyloxy carbonyl, ALINKERB has the same meaning as in formula (I) with the exception that one or more of the optional groups of formula (VII) may be replaced by a group of formula (VII) and R1; R2; R3; x; y; z and (—), at each occurrence, have the same meaning as in formula (I) and Pr is as defined above; in a dipolar aprotic solvent in the presence of a base to obtain a compound of formula (IV) wherein Pr; ALINKERB; R1; R2; R3; x; y; z; and (—), at each occurrence, have the same meaning as in formula (III); which compound is then (B) deprotected by reaction with formic acid or a mixture of formic acid or acetic acid with hydrochloric acid or hydrobromic acid, to give the compound of formula (I) as well as the compounds of the aforementioned formula (IV).