N,N'-ethylene-bis(benzoylacetoniminato) copper (II), Cu(C22H22N2O2), a new reagent for aromatization of Hantzsch 1,4-dihydropyridines.
نویسندگان
چکیده
A variety of Hantzsch 1,4-dihydropyridines were oxidized to their corresponding pyridines in high yields in the presence of Cu(C22H22N2O2) in refluxing acetic acid.
منابع مشابه
Investigation of Catalytic Activity of Pillared-layer Ni (II) Metal-Organic Framework Derived NiO Nanoparticles for Aromatization of Hantzsch 1,4-Dihydropyridines
The pillared-layer metal-organic framework of Ni2(BTEC)(bipy)3.3DMF.2H2O (BTEC = 1,2,4,5-benzenetetracarboxylate; bipy = 4,4́-bipydine; DMF =N,Ń-dimethylformamide) was prepared, characterized and used as a precursor for preparation of NiO nanoparticles. The morphology and structure of NiO nanoparticles were characterized by XRD, SEM, FT-IR and EDX techniques. I...
متن کاملAROMATIZATION OF HANTZSCH 1,4- DIHYDROPYRIDINES WITH ZINC CHLOROCHROMATE NONAHYDRATE
Hantzsch 1 ,4- dihy&opyridines are rapidly oxidized to the corresponding pyridine derivatives using zinc chlorochromate nonahydrate [Zn(C1CrO ) .9H O] in dichloromethane at room temperature. In addition to aromatization, no loss of the 4- substituent is observed
متن کاملPhospho sulfonic acid: an efficient solid acid catalyst for the facile preparation of 1,4-dihydropyridines
A simple and mild one-pot three-component reaction for the preparation 1,4-dihydropyridines has been developed from various aldehyde substrates, 1,3-dicarbonyl compounds (dimedone) and ammonium acetate (Hantzsch method) in the presence of a catalytic amount of phospho sulfonic acid (PSA) as an efficient and heterogeneous solid acid in EtOH at room temperature. Preparation of PSA is straightforw...
متن کاملOxidative aromatization of some 1,4-dihydropyridines by aqueous hydrogen peroxide in ethanol
Some 3, 5-diacyl or 3,5-diester 1,4-dihydropyridines were oxidized to the corresponding pyridine derivatives using hydrogen peroxide in aqueous ethanol in the presence of potassium bromide and acetic acid as the catalysts. The reaction was carried out in ethanol and products were isolated in high to excellent yields. However, oxidation of 3,5-diacetyl 1,4-dihydropyridines is slower than 3,5-die...
متن کاملOxidative aromatization of some 1,4-dihydropyridine derivatives using NaBrO3
In this study, oxidation of some 3,5-diacyl or 3,5-diester 1,4-dihydropyridines to corresponding pyridine derivatives using sodium bromate in the presence of NH4Cl, NaHSO4 and Bu4NHSO4 under thermal conditions has been investigated. The yield and structure of formed products is similar under all conditions; however, the reaction is accelerated in the presence of Bu4NHSO4 and NaHSO4. In addition...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Molecules
دوره 12 3 شماره
صفحات -
تاریخ انتشار 2007