Synthesis and Biological Evaluation of the 1-Arylpyrazole Class of σ<sub>1</sub> Receptor Antagonists: Identification of 4-{2-[5-Methyl-1-(naphthalen-2-yl)-1<i>H</i>-pyrazol-3-yloxy]ethyl}morpholine (S1RA, E-52862)
作者:José Luis Díaz、Rosa Cuberes、Joana Berrocal、Montserrat Contijoch、Ute Christmann、Ariadna Fernández、Adriana Port、Jörg Holenz、Helmut Buschmann、Christian Laggner、Maria Teresa Serafini、Javier Burgueño、Daniel Zamanillo、Manuel Merlos、José Miguel Vela、Carmen Almansa
DOI:10.1021/jm3007323
日期:2012.10.11
yl}morpholine (S1RA, E-52862), which showed high activity in the mouse capsaicin model of neurogenicpain, emerged as the most interesting candidate. In addition, compound 28 exerted dose-dependent antinociceptive effects in several neuropathic pain models. This, together with its good physicochemical, safety, and ADME properties, led compound 28 to be selected as clinical candidate.
Studies of Heterocyclic Compounds. II. Acetyl Transfer Reactions of 3-Acetoxy-1-acetyl-5-methylpyrazole and the Related Compounds
作者:KIICHI ARAKAWA、TADASHI MIYASAKA、HISAO OCHI
DOI:10.1248/cpb.22.214
日期:——
The individual reactions of acetyl group rearrangement are examined to elucidate the complicated formation of five acetylated products of 3-methylpyrazol-5-one (I). In heated acetic acid-anhydride mixture the initially formed 2-acetyl-3-hydroxy-5-methylpyrazole (II) reacts further to produce 1-acetyl-3-hydroxy-5-methylpyrazole (III), 3-acetoxy-2-acetyl-5-methylpyrazole (IV) and finally 3-acetoxy-1-acetyl-5-methylpyrazole (V), while inter- as well as intra-molecular acetyl transfer reaction takes place. The diacetate (V) is a sort of activated ester and is proved to be effective as a mild acetylating reagent of primary and secondary amines.
New pyrazolones as 11b-HSD1 inhibitors for diabetes
申请人:Amrein Kurt
公开号:US20070049574A1
公开(公告)日:2007-03-01
Compounds of formula
as well as pharmaceutically acceptable salts and esters thereof, wherein R
1
to R
4
have the significance given in claim
1
can be used in the form of pharmaceutical compositions.
Monobromomalononitrile: an efficient regioselective mono brominating agent towards active methylene compounds and enamines under mild conditions
作者:Sudipta Pathak、Ashis Kundu、Animesh Pramanik
DOI:10.1039/c3ra46687f
日期:——
The potential of monobromomalononitrile (MBM) as a convenient source of cationic bromine in organic bromination reaction has been explored. Studies reveal that MBM can be a good substitute for N-bromosuccinimide (NBS) in various respects. Enamines and active methylene compounds bearing aromatic rings are selectively mono brominated on the vinylic and active methylene group respectively on reaction
Tris-hydroxymethylaminomethane (THAM): An efficient organocatalyst in diversity-oriented and environmentally benign synthesis of spirochromenes
作者:Supriya S. Khot、Prashant V. Anbhule、Uday V. Desai、Prakash P. Wadgaonkar
DOI:10.1016/j.crci.2018.05.005
日期:2018.9
Résumé Tris-hydroxymethylaminomethane has been demonstrated to be an efficient organocatalyst in diversity-oriented synthesis of medicinally prevalent spirochromenes by one-pot, three-component reactions between isatins, malononitrile, and enolizable CH acids like dimedone, 4-hydroxycoumarin, 4-hydroxy-N-methylquinolin-2-one, or in situ generated 2-methylpyrazolon-2-one. Biodegradability and extremely low cost of the catalyst are the noteworthy features of this chromatography-free protocol. Supplementary Materials: Supplementary material for this article is supplied as a separate file: mmc1.pdf