Discovery of CGS 27023A, a Non-Peptidic, Potent, and Orally Active Stromelysin Inhibitor That Blocks Cartilage Degradation in Rabbits
作者:Lawrence J. MacPherson、Erol K. Bayburt、Michael P. Capparelli、Brian J. Carroll、Robert Goldstein、Michael R. Justice、Lijuan Zhu、Shou-ih Hu、Richard A. Melton、Lynn Fryer、Ron L. Goldberg、John R. Doughty、Salvatore Spirito、Vincent Blancuzzi、Doug Wilson、Elizabeth M. O'Byrne、Vishwas Ganu、David T. Parker
DOI:10.1021/jm960871c
日期:1997.8.1
Structure-activity relationships of a lead hydroxamic acid inhibitor of recombinant human stromelysin were systematically defined by taking advantage of a concise synthesis that allowed diverse functionality to be explored at each position in a template. An ex vivo rat model and an in vivo rabbit model of stromelysin-induced cartilage degradation were used to further optimize these analogs for oral activity and duration of action. The culmination of these modifications resulted in CGS 27023A, a potent, orally active stromelysin inhibitor that blocks the erosion of cartilage matrix.
A Hydrazone-Based <i>exo</i>
-Directing-Group Strategy for β C−H Oxidation of Aliphatic Amines
作者:Zhongxing Huang、Chengpeng Wang、Guangbin Dong
DOI:10.1002/anie.201600912
日期:2016.4.18
group (DG) strategy developed for the functionalization of unactivated primary β C−H bonds of aliphaticamines. Conveniently synthesized from protected primary amines, the hydrazone DGs are shown to site‐selectively promote the β‐acetoxylation and tosyloxylation via five‐membered exo‐palladacycles. Amines with a wide scope of skeletons and functional groups are tolerated. Moreover, the hydrazone DG