H. Waldmann et al., SELECTIVE ENZYMATIC REMOVAL OF PROTECTING GROUPS - THE PHENYLACETAMIDE AS AMINO PROTECTING GROUP IN PHOSPHOPEPTIDE SYNTHESIS, Tetrahedron letters, 37(48), 1996, pp. 8725-8728
The phenylacetamido (PhAc) amino protecting group can be removed from
sensitive phosphopeptides by means of penicillin G acylase under mild
conditions (pH 6.5, room temperature) and without attack on the peptid
e bonds, the C-terminal esters or the phosphates. In particular, under
the conditions of the enzymatic reactions a beta-elimination of the p
hosphate does not occur. Copyright (C) 1996 Elsevier Science Ltd