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US 4,571,430 AGranted
Homocysteine and homocysteinamide derivatives
AssigneeMedi-Physics, Inc.
InventorsEdmund F. Byrne, Glen L. Tolman
Life of this patent
Estimating the term…
Abstract
Novel homocysteine thiolactone bifunctional chelating agents useful for chelating radionuclides to produce a radiodiagnostic agent for use in vivo imaging and a method for producing this chelating agent.
Claims10
A compound of the formula:
- ##STR10## wherein R is hydrogen or lower alkyl;
- R.sub.1 and R.sub.2 are individually hydrogen or lower alkyl or taken together form oxo;
- R.sub.3 is an amino protecting group where R.sub.1 and R.sub.2 are individually hydrogen or lower alkyl;
- R.sub.3 is hydrogen when R.sub.1 and R.sub.2 taken together form oxo;
- R.sub.4 is hydrogen or lower alkyl;
- R.sub.5 is hydrogen or a thiol protecting group;
- x and y are integers of from 0 to 2.
4 more elements
A compound of the formula:
- ##STR11## wherein R is hydrogen or lower alkyl;
- R.sub.6 is lower alkyl;
- R.sub.1 and R.sub.2 are individually hydrogen or lower alkyl or taken together form oxo;
- R.sub.3 is hydrogen or an amino protecting group;
- R.sub.4 is hydrogen or lower alkyl;
- R.sub.5 is hydrogen or a thiol protecting group;
- and x and y are integers of from 0 to 2.
4 more elements
Dependencies are inferred from the claim text.