β-Lactam Derivatives as Inhibitors of Human Cytomegalovirus Protease
作者:Christiane Yoakim、William W. Ogilvie、Dale R. Cameron、Catherine Chabot、Ingrid Guse、Bruno Haché、Julie Naud、Jeff A. O'Meara、Raymond Plante、Robert Déziel
DOI:10.1021/jm980131z
日期:1998.7.1
The development of novel monobactam inhibitors of HCMV protease incorporating a carbon side chain at C-4 and a urea function at N-1 is described. Substitution with small groups at the C-3 position of the beta-lactam ring gave an increase in enzymatic activity and in stability; however, a lack of selectivity against other serine proteases was noted. The use of both tri- and tetrasubstituted urea functionalities gave effective inhibitors of HCMV protease. Benzyl substitution of the urea moiety was beneficial, especially when strong electron-withdrawing groups where attached at the para position. Modest antiviral activity was found in a plaque reduction assay.
Orally Active .beta.-Lactam Inhibitors of Human Leukocyte Elastase. 3. Stereospecific Synthesis and Structure-Activity Relationships for 3,3-Dialkylazetidin-2-ones
作者:Paul E. Finke、Shrenik K. Shah、Daniel S. Fletcher、Bonnie M. Ashe、Karen A. Brause、Gilbert O. Chandler、Pam S. Dellea、Karen M. Hand、Alan L. Maycock
DOI:10.1021/jm00013a021
日期:1995.6
their in vivo oral efficacy in an HLE-mediated hamster lung hemorrhage assay. Further alkyl substitution on the benzylic urea moiety, especially in the R configuration, afforded enhanced HLE inhibition and in vivo efficacy. The stereochemical assignments for (3R,4S)-4-[(4-carboxyphenyl)oxy]-3-ethyl-3-methyl-1-[[((R)-1- phenylpropyl)amino]carbonyl]azetidin-2-one (42a) (kobs/[I] = 91,000 M-1 s-1) were confirmed