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US 3,944,590 AGranted
Process for the temporary protection of amino groups in peptide syntheses
AssigneeCiba-Geigy Corporation
InventorsBeat Iselin, Peter Sieber
Life of this patent
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Abstract
Temporary protection of amino groups by the group of the formula I ##EQU1## in which R.sub.1 represents lower alkyl, R.sub.2 lower alkyl or phenyl and R.sub.3 phenyl, and wherein the phenyl radicals are unsubstituted or substituted by lower alkyl, phenyl or lower alkylphenyl groups.
Claims7
A compound of the formula II ##EQU4## in which R.sub.1 is lower alkyl, R.sub.2 is lower alkyl or phenyl and R.sub.3 is phenyl and wherein phenyl is unsubstituted or substituted by lower alkyl, phenyl or lower alkylphenyl and X stands for phenyloxy or p-nitrophenyloxy.
Dependencies are inferred from the claim text.