M. Patel et al., THE SYNTHESIS OF SYMMETRICAL AND UNSYMMETRICAL P1 P1' CYCLIC UREAS ASHIV PROTEASE INHIBITORS/, Bioorganic & medicinal chemistry letters, 8(9), 1998, pp. 1077-1082
Cyclic urea SD146, a potent HIV protease inhibitor bearing a flat resi
stance profile, possessed poor solubility and bioavailability, which p
recluded further development of the compound. In an effort to improve
upon the pharmacokinetic profile of the compound, several analogs modi
fied at the P1/P1' residues were prepared and evaluated. Several of th
ose compounds displayed significant improvement of physical properties
. (C) 1998 The DuPont Merck Pharmaceutical Company. Published by Elsev
ier Science Ltd. All rights reserved.