A simple synthesis of E-9-aryl-5-arylidene-1-oxo-1,2,3,4,5,6,7, 8-octahydroxanthenes and their lower analogues from E,E-α,α′-diarylidenecycloalkanones
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چکیده
منابع مشابه
A highly efficient green synthesis of 1, 8-dioxo-octahydroxanthenes
SmCl3 (20 mol%) has been used as an efficient catalyst for reaction between aromatic aldehydes and 5,5-dimethyl-1,3-cyclohexanedione at 120°C to give 1,8-dioxo-octahydroxanthene derivatives in high yield. The same reaction in water, at room temperature gave only the open chain analogue of 1,8-dioxo-octahydroxanthene. Use of eco-friendly green Lewis acid, readily available catalyst and easy isol...
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15 صفحه اولSynthesis of 5-amino-1-aryl-4-cyanoimidazoles from formamidines under solvent-free condition
The aryl-(Z)-N-[2-amino-1,2-dicyanovinyl]formamidine 2 cyclize in solvent-free conditions and in the presence of a base to give a 5-amino-1-aryl-4-cyanoimidazoles 3. Silica sulfuric acid as an efficient and reusable heterogeneous catalyst has been used for the preparation of amidines 2 from formimidate 1 through reaction with aromatic amines at room temperature and in good to excellent yields. ...
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The aryl-(Z)-N-[2-amino-1,2-dicyanovinyl]formamidine 2 cyclize in solvent-free conditions and in the presence of a base to give a 5-amino-1-aryl-4-cyanoimidazoles 3. Silica sulfuric acid as an efficient and reusable heterogeneous catalyst has been used for the preparation of amidines 2 from formimidate 1 through reaction with aromatic amines at room temperature and in good to excellent yields. ...
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A new se ries of tricarbonyl com pounds, in which the keto groups are at tached to olefinic link ages, have been syn the sized by the re ac tion be tween acetoacetanilide and ar o matic al de hydes (2-chlorobenzaldehyde, 4-chlorobenzaldehyde, 4-hydroxybenzaldehyde and vanillin) un der spec i fied con di tions. Their IR, H NMR and mass spec tral data re vealed that only one of the car bonyl grou...
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ژورنال
عنوان ژورنال: Journal of Chemical Sciences
سال: 2013
ISSN: 0974-3626,0973-7103
DOI: 10.1007/s12039-013-0442-6