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US 9,546,171 B2Granted
Preparation of ertapenem intermediates
AssigneeSandoz Ltd.
InventorsHannes Lengauer, Birgit Endl, Wolfgang Felzmann
Life of this patent
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Abstract
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.
Claims8
A process for the preparation of a compound of formula (VI) or a salt thereof,
- comprising a step d) of converting a crystalline compound of formula (I) or a solvate thereof
- to the compound of formula (VI);
- wherein the PG residues are each and independently a protective group, which is capable of protecting a carboxylic acid function.
Dependencies are inferred from the claim text.