Derivatives of 2-[(alkylsulfonyl)oxy]-1H-isoindole-1,3(2H)-diones (N-(
sulfonyloxy)phthalimides) with ring substituents in the 6-position wer
e found to exhibit enhanced inhibitory potency and selectivity for HLE
. The most potent inhibitor of HLE in this series was 2-[(methylsulfon
yl)oxy]-1H-isoindole-1,3(2H)-dione 10 with a k(obs)/[I] of 110,000 M(-
1) s(-1).