The invention relates to compounds of formula
wherein the substituents are as defined in the specification and to pharmaceutically acceptable acid addition salts thereof. The invention further relates to methods for the treatment of psychoses, pain, neurodegenerative disfunction in memory and learning, schizophrenia, dementia and other diseases in which cognitive processes are impaired, such as attention deficit disorders or Alzheimer's disease.
New ligands for the ORL-1 receptor are described, useful for antagonising the activity of said receptors in a patient in need thereof, and for preventing and treating illnesses dependent on the activation of this receptor. The new compounds conform to structural formula (I) wherein R1, R2, R3, R4 are further defined in the description.
Pd-Catalyzed Aryl Amination Mediated by Well Defined, N-Heterocyclic Carbene (NHC)–Pd Precatalysts, PEPPSI
作者:Michael G. Organ、Mirvat Abdel-Hadi、Stephanie Avola、Igor Dubovyk、Niloufar Hadei、Eric Assen B. Kantchev、Christopher J. O'Brien、Mahmoud Sayah、Cory Valente
DOI:10.1002/chem.200701621
日期:2008.3.7
Pd-N-heterocyclic carbene (NHC)-catalyzed Buchwald-Hartwig amination protocols mediated by Pd-PEPPSI precatalysts is described. These protocols provide access to a range of hindered and functionalized drug-like aryl amines in high yield with both electron-deficient and electron-rich aryl- and heteroaryl chlorides and bromides. Variations in solvent polarity, base and temperature are tolerated, enhancing