(R)- or (S)-benzyl 4-formyl-2,2-dimethyl-3-oxazolidinecarboxylate (7a) and (R)- or (S)-1,1-dimethylethyl 4-formyl-2,2-dimethyl-3-oxazolidinecarboxylate (7b), readily available from serine, react with Wittig reagents to give alkenes 8. Selective deprotection followed by oxidation of the resulting unsaturated amino alcohols 9 provides vinylglycines 5 of defined configuration (> 95% ee) and double-bond geometry. D-Vinylglycines are obtained from L-serine, and conversely, D-serine gives beta,gamma-unsaturated amino acids with the L configuration. The double-bond geometry is controlled by the nature of the phosphorous ylide employed. The scope and limitations of this new methodology for the preparation of chiral vinylglycines is examined.
(2<i>S</i>,1‘<i>S</i>,2‘<i>S</i>,3‘<i>R</i>)-2-(2‘-Carboxy-3‘-methylcyclopropyl) Glycine Is a Potent and Selective Metabotropic Group 2 Receptor Agonist with Anxiolytic Properties
作者:Iván Collado、Concepción Pedregal、Angel Mazón、Juan Félix Espinosa、Jaime Blanco-Urgoiti、Darryle D. Schoepp、Rebecca A. Wright、Bryan G. Johnson、Ann E. Kingston
DOI:10.1021/jm0110486
日期:2002.8.1
asymmetric synthesis and biological activity of (2S,1'S,2'S,3'R)-2-(2'-carboxy-3'-methylcyclopropyl) glycine 7 and its epimer at the C3' center 6 are described. Compound 7 is a highly potent and selective agonist for group 2 metabotropric glutamate receptors (mGluRs). It is also systemically 4 orders of magnitude more active in the fear-potentiated startle model of anxiety in rats than the rigid constrained
COMPOSITIONS AND METHODS FOR INHIBITING VIRAL POLYMERASE
申请人:Kotian Pravin L.
公开号:US20150191472A1
公开(公告)日:2015-07-09
Provided are compounds of Formula I:
as described herein. Compounds of Formula I are useful in methods of inhibiting viral RNA polymerase activity and viral replication. Also provided are pharmaceutical compositions comprising compounds of Formula I, as well as methods of treating viral infections using compounds of Formula I.