A novel class of inhibitor of the herpes proteases acting upon the cat
alytic apparatus by forming covalent complexes are described. Two new
families of inhibitor, the spirocyclopropyI oxazolones and the benzyli
dine N-sulphonyloxyimidazolones, have been shown to be submicromolar i
nhibitors of HSV-2 and HCMV proteases which are selective relative to
a panel of standard serine proteases. Copyright (C) 1996 Elsevier Scie
nce Ltd