Trans diastereoselective synthesis of 3-alkyl substituted β-lactams via the acid chloride-imine reaction of nonactivated acid chlorides
作者:Margaret Browne、Duane A. Burnett、Mary Ann Caplen、Lian-Yong Chen、John W. Clader、Martin Domalski、Sundeep Dugar、Pradeep Pushpavanam、Rosy Sher、Wayne Vaccaro、Monica Viziano、Hongrong Zhao
DOI:10.1016/0040-4039(95)00338-d
日期:1995.4
New conditions for the acid chloride-imine reaction of nonactivated alkyl acid chlorides provide 3-alkyl substituted β-lactams in good yields with high trans selectivity.
2-Azetidinone Cholesterol Absorption Inhibitors: Structure−Activity Relationships on the Heterocyclic Nucleus
作者:John W. Clader、Duane A. Burnett、Mary Ann Caplen、Martin S. Domalski、Sundeep Dugar、Wayne Vaccaro、Rosy Sher、Margaret E. Browne、Hongrong Zhao、Robert E. Burrier、Brian Salisbury、Harry R. Davis
DOI:10.1021/jm960405n
日期:1996.1.1
A series of azetidinone cholesterol absorption inhibitors related to SCH 48461 ((-)-6) has been prepared, and compounds were evaluated for their ability to inhibit hepatic cholesteryl ester formation in a cholesterol-fed hamster model. Although originally designed as acyl CoA: cholesterol acyltransferase (ACAT) inhibitors, comparison of in vivo potency with in vitro activity in a microsomal ACAT assay indicates no correlation between activity in these two models. The molecular mechanism by which these compounds inhibit cholesterol absorption is unknown. Despite this limitation, examination of the in vivo activity of a range of compounds has revealed clear structure-activity relationships consistent with a well-defined molecular target. The details of these structure-activity relationships and their implications on the nature of the putative pharmacophore are discussed.
2-Azetidinones as Inhibitors of Cholesterol Absorption
作者:Duane A. Burnett、Mary Ann Caplen、Harry R. Davis、Robert E. Burrier、John W. Clader