Sulfenylation Using Sulfoxides. Intramolecular Cyclization of 2- and 3-Acylpyrroles
摘要:
AlCl3-catalyzed acylation of N-(phenylsulfonyl)pyrrole with 2-(ethylthio)benzoyl chloride followed by hydrolysis provided 2-(2-(ethylthio)benzoyl)pyrrole (3). Compound 3 was also available from ethyl 2-(ethylthio)benzoate and pyrrolylmagnesium chloride (Scheme 2). Oxidation(NaIO4) gave the corresponding sulfoxide 4 which when refluxed 6 h inp-xylene (bp 138 degrees C) gave predominately the C-3 cyclization product 11 (51%) along with the rearrangement product 12 (17%). Conducting the thermal reaction in the presence of DMAP in refluxing toluene gave mainly the N-1 cyclization product 13 (46%) also accompanied by the rearrangement product 12 (20%). Formation of a 2H-pyrrole spirocyclic intermediate from thermally promoted intramolecular ipso-sulfenylation in 4 is suggested to account for the formation of 12. The N-methyl derivative of 4 (i.e. 6) produced 9 and 10 after 9 h at 138 degrees C; in the presence of DMAP only 9 is produced after 18 h at 138 degrees C. The 3-acyl sulfoxide 8 cyclized to 17 during 6.5 h at 138 degrees C. These results indicate that although sulfoxides are useful for intramolecular sulfenylation reactions, care must be taken in assigning structures to the product(s) because rearrangement may take place during and/or after the initial cyclization reaction. Addition of a basic amine to the reaction mixture may prevent acid-catalyzed rearrangements of the initially formed products.
[EN] DIARYLTRIAZOLES AS INHIBITORS OF 11-BETA-HYDROXYSTEROID DEHYDROGENASE-1<br/>[FR] UTILISATION DE DIARYLTRIAZOLES COMME INHIBITEURS DE LA 11-BETA-HYDROXYSTEROIDE DESHYDROGENASE-1
申请人:MERCK & CO INC
公开号:WO2005097759A1
公开(公告)日:2005-10-20
2,5-Diaryl-1,2,4-triazole derivatives of structural formula I are selective inhibitors of the 11β-hydroxysteroid dehydrogenase Type 1 enzyme (11β-HSD-1). The compounds are useful for the treatment of diabetes, hyperglycemia, obesity, insulin resistance, atherosclerosis, dyslipidemia, hyperlipidemia, hypertension, and Metabolic Syndrome. Also disclosed are novel compounds of structural formula II which are inhibitors of 11β-HSD-1.
[EN] FUSED HETEROCYCLIC COMPOUND AND USE FOR PEST CONTROL THEREOF<br/>[FR] COMPOSÉ HÉTÉROCYCLIQUE FUSIONNÉ ET SON UTILISATION POUR LA LUTTE CONTRE LES RAVAGEURS
申请人:SUMITOMO CHEMICAL CO
公开号:WO2012086848A1
公开(公告)日:2012-06-28
A fused heterocyclic compound the formula (1) : wherein A1 represents -NR8-, and the like; A2 represents a nitrogen atom, and the like; A3 represents a nitrogen atom, and the like; R1 represents a C1-C6 chain hydrocarbon group optionally having one or more atoms or groups selected from Group X, and the like; R2, R3, R4, and R5 are same or different and represent independently a C1-C6 chain hydrocarbon group optionally having one or more halogen atoms, and the like; R6 and R7 are same or different and represent independently a C1-C6 chain hydrocarbon group optionally having one or more atoms or groups selected from Group X, and the like; R8 represents a C1-C6 chain hydrocarbon group optionally having one or more atoms or groups selected from Group W, and the like; n represents 0, 1 or 2. The compound has an excellent activity of controlling pests.
Synthesis, spectral characterization and electrochemical properties of (2-alkylthiobenzoyl)ferrocenes. Crystal structures of 2-methylthio, 2-ethylthio and 2-isopropylthio derivatives
作者:Zoran Ratković、Slađana B. Novaković、Goran A. Bogdanović、Dejan Šegan、Rastko D. Vukićević
DOI:10.1016/j.poly.2010.04.034
日期:2010.7
(2-alkylthiobenzoyl)ferrocenes has been achieved by Friedel–Crafts acylation of ferrocene with acid chlorides generated in situ from the corresponding carboxylic acids and phosphorous trichloride. The obtained compounds were characterized by spectroscopic data (UV, IR, 1H and 13C NMR), whereas their electrochemical properties have been investigated by cyclic voltammetry. The single-crystal X-ray structure determinations
Diaryltriazoles as Inhibitors of 11-Beta-Hydroxysteroid Dehydrogenase-1
申请人:Aster Susan D.
公开号:US20080255216A1
公开(公告)日:2008-10-16
2,5-Diaryl-1,2,4-triazole derivatives of structural formula I are selective inhibitors of the 11&bgr;-hydroxysteroid dehydrogenase Type 1 enzyme (11&bgr;-HSD-1). The compounds are useful for the treatment of diabetes, hyperglycemia, obesity, insulin resistance, atherosclerosis, dyslipidemia, hyperlipidemia, hypertension, and Metabolic Syndrome. Also disclosed are novel compounds of structural formula II which are inhibitors of 11&bgr;-HSD-1.
Diaryltriazoles as inhibitors of 11-beta-hydroxysteroid dehydrogenase-1
申请人:Merck Sharp & Dohme Corp.
公开号:US08178546B2
公开(公告)日:2012-05-15
2,5-Diaryl-1,2,4-triazole derivatives of structural formula I are selective inhibitors of the 11β-hydroxysteroid dehydrogenase Type 1 enzyme (11β-HSD-1). The compounds are useful for the treatment of diabetes, hyperglycemia, obesity, insulin resistance, atherosclerosis, dyslipidemia, hyperlipidemia, hypertension, and Metabolic Syndrome. Also disclosed are novel compounds of structural formula II which are inhibitors of 11β-HSD-1.