The discovery of potent, selective, and orally bioavailable PDE9 inhibitors as potential hypoglycemic agents
作者:Michael P. DeNinno、Melissa Andrews、Andrew S. Bell、Yue Chen、Cynthia Eller-Zarbo、Nan Eshelby、John B. Etienne、Dianna E. Moore、Michael J. Palmer、Michael S. Visser、Li J. Yu、William J. Zavadoski、E. Michael Gibbs
DOI:10.1016/j.bmcl.2009.03.024
日期:2009.5
lead, the sequential use of parallel medicinal chemistry and directed synthesis led to the discovery of potent, highly selective, and orally bioavailable PDE9 inhibitors. The availability of these tools allowed for a thorough evaluation of the therapeutic potential of PDE9 inhibition.
Dioxime oxalates; new iminyl radical precursors for syntheses of N-heterocycles
作者:Fernando Portela-Cubillo、James Lymer、Eoin M. Scanlan、Jackie S. Scott、John C. Walton
DOI:10.1016/j.tet.2008.08.112
日期:2008.12
an atom-efficient way of generating iminylradicals. The process was most efficient for dioxime oxalates having aryl substituents attached to their CN bonds. The method was useful for EPR spectroscopic study of iminyl and iminoxyl radicals. Photolyses in toluene solution, of dioxime oxalates containing alkenyl acceptor groups, yielded unsaturated iminylradicals that ring closed to afford 3,4-dihydro-2H-pyrroles
A New Method for the Generation and Cyclization of Iminyl Radicals via the Hudson Reaction
作者:Xichen Lin、Didier Stien、Steven M. Weinreb
DOI:10.1021/ol990720e
日期:1999.8.1
[formula: see text] A mild new synthetic procedure has been developed for in situ generation and cyclization of iminylradicals onto pendant alkenes, followed by functionalization of the resulting carbon radical by one of a variety of trapping reagents. The key process in the method involves production of the iminylradical via treatment of an aldoxime or ketoxime with readily available 2,6-dimethylbenzenesulfinyl
Iminyl radicals: Part III. Further synthetically useful sources of iminyl radicals.
作者:Jean Boivin、Eric Fouquet、Anne-Marie Schiano、Samir Z Zard
DOI:10.1016/s0040-4020(01)80851-6
日期:1994.1
New methods for generating iminylradicals have been developed using suitable derivatives of oximes; Barton's decarboxylation of O-carboxymethyl derivatives proved to be particularly effective.
N-hydroxypyridine-2-thione carbamates. v. syntheses of alkaloid skeletons by aminium cation radical cyclizations
作者:Martin Newcomb、Donald J. Marquardt、Thomas M. Deeb
DOI:10.1016/s0040-4020(01)82013-5
日期:1990.1
The title radical precursors (PTOC carbamates) were employed as sources of a variety of 5,6-unsaturated aminium cation radicals. 5-Exo radicalcyclization followed by trapping by t-BuSH or the PTOC carbamate gave a variety of aklaloid skeletons, typically in good to excellent yields, including pyrrolidines, perhydroindoles, pyrrolizidines, tropanes, 9-azabicyclo[4.2.1]nonanes, 6-azabicyclo [3.2.1]octanes