Efficient synthesis of organic thioacetates in water
作者:F. Olivito、P. Costanzo、M. L. Di Gioia、M. Nardi、Oliverio M.、A. Procopio
DOI:10.1039/c8ob01896k
日期:——
Thioacetates as precursors of thiols are interesting starting points for synthesizing other organosulfur compounds. Herein, we propose a simple, efficient and fast method to obtain organic thioacetates using water as a solvent. Taking into account the great attention that has been paid toward environmentally friendly synthetic procedures in the past decades, we prove the role and the strength of the
Method of preparation of halogen-free ionic liquids and ionic liquids prepared in this manner
申请人:Cassol Claudia Cristiana
公开号:US20080045723A1
公开(公告)日:2008-02-21
The reaction of N-alkylimidazol with alkyl sulfonates, at room temperature, favors the production of 1,3-dialkylimidazolium alkane-sulfonates as crystalline solids at high yields. The alkane-sulfonate anions may be easily substituted by a series of other anions [BF
4
, PF
6
, PF
3
(CF
2
CF
3
)
3
, CF
3
SO
3
and (CF
3
SO
2
)
2
N] through simple anion, salt, or acid reactions in water at room temperature. The extraction with dichloromethane, filtration, and evaporation of the solvent, allows the production of the desired ionic liquids at a yield of 80-95%. The purity of these ionic liquids (in some cases >99.4%) is performed using the intensity of
13
C satellite signals from the magnetic resonance spectrums of the N-methyl imidazolium group as an internal standard.
Synthesis and SAR of New 5-Phenyl-3-ureido-1,5-benzodiazepines as Cholecystokinin-B Receptor Antagonists
作者:Antonella Ursini、Anna M. Capelli、Robin A. E. Carr、Paolo Cassarà、Mauro Corsi、Ornella Curcuruto、Giovanni Curotto、Michele Dal Cin、Silvia Davalli、Daniele Donati、Aldo Feriani、Harry Finch、Gabriella Finizia、Giovanni Gaviraghi、Marc Marien、Giorgio Pentassuglia、Stefano Polinelli、Emiliangelo Ratti、Aldo Reggiani、Giorgio Tarzia、Giovanna Tedesco、Maria E. Tranquillini、David G. Trist、Frank T. M. Van Amsterdam
DOI:10.1021/jm990967h
日期:2000.10.1
A series of 5-phenyl-3-ureidobenzodiazepine-2,4-diones was synthesized and evaluated as cholecystokinin-B (CCK-B) receptorantagonists. Structure-activity relationship (SAR) studies revealed the importance of the N-1 substituent for potent and selective CCK-B affinity. Addition of substituents at the urea side chain provided in some cases more potent compounds. Moreover the introduction of bulky substituents
A rhodium-catalyzed carbonylative transformation of alkyl halides under low pressure of CO has been developed. This robust catalyst system allows using phenols as the carbonylative coupling partner and, meanwhile, exhibits high functional group tolerance and good chemoselectivity. Substrates even with a large steric hindrance group or multiple reaction sites can be selectively converted into the desired
[EN] NOVEL PIPERAZINYL-PYRAZINONE DERIVATIVES FOR THE TREATMENT OF 5-HT2A RECEPTOR-RELATED DISORDERS<br/>[FR] NOUVEAUX DERIVES DE PIPERAZINYL-PYRAZINONE POUR LE TRAITEMENT DES TROUBLES LIES AU RECEPTEUR 5-HT2A
申请人:BIOVITRUM AB
公开号:WO2004009586A1
公开(公告)日:2004-01-29
Compounds of the general formula (I): (I)wherein m, n, R1, R2, R3 and R4 are as described in the specification. Further included are pharmaceutical compositions comprising the compounds, processes for their preparation, as well as the use of the compounds for the preparation of a medicament for the treatment of 5-HT2A receptor-related disorders or medical conditions.