Oxyacetic acid compounds and process for their manufacture
AssigneeCiba-Geigy Corporation
InventorsKarl Heusler, Robert Burns Woodward
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Abstract
.alpha.-Hydroxy-2-oxo-1-azetidinemethane-carboxylic acid compounds of formula ##STR1## wherein R.sub.1 represents a hydrogen atom or the organic residue of an alcohol, R.sub.2 represents a hydrogen atom or an acyl residue, R.sub.3 represents an organic residue and R.sub.4 represents a hydrogen atom, when R.sub.2 stands for an acyl residue, or the two groups R.sub.3 and R.sub.4 together represent a disubstituted carbon atom, when R.sub.2 stands for a hydrogen atom or an acyl group, are useful as intermediates for the manufacture of pharmacologically active compounds.
Claims5
A compound of the formula ##STR74## in which R.sub.1 ' represents a member selected from the group consisting of hydrogen, lower alkyl, halogeno-lower alkyl, and phenyl-lower alkyl, R.sub.2 ' represents a member selected from the group consisting of a hydrogen atom and an acyl residue of a lower alkyl, lower alkenyl, phenyl or phenyl-lower alkyl half-ester of carbonic acid, and each of the radicals R.sub.5 and R.sub.6 stands for lower alkyl, each of said lower alkyl and lower alkenyl groups having up to 7 carbon atoms.
Dependencies are inferred from the claim text.