Reactions between Azolium Salts and Nucleophilic Reagents. IV. 1,3-Dimethyl-1,2,3-triazolium Salts and Sodium Methoxide.
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چکیده
منابع مشابه
Nucleophilic arylation with tetraarylphosphonium salts
Organic phosphonium salts have served as important intermediates in synthetic chemistry. But the use of a substituent on the positive phosphorus as a nucleophile to construct C-C bond remains a significant challenge. Here we report an efficient transition-metal-free protocol for the direct nucleophilic arylation of carbonyls and imines with tetraarylphosphonium salts in the presence of caesium ...
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wvhich aire occupied by illustrations, hut the author has Nvritten succinctly without alnyloss of clarity, ani(d he can coinveymnuch valuable information in very little space. H-lis illustrations halve been chosen wisely, and their quality is of a remarkably high standard. There is no notable omission, withi the single exception, perhaps, of an account of the important changes in the only pa-t ...
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A series of novel chiral triazolium salts has been synthesized from readily available (1R,2R)-DPEN and found to be efficient for the enantioselective intramolecular Stetter reaction. With 10 mol% of the catalyst, the intramolecular Stetter reaction was realized in excellent yields with up to 97% ee.
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Camphor-derived chiral triazolium salts have been found to be highly efficient for asymmetric intramolecular Michael reactions. With 1-5 mol% of the catalyst, the desired products were obtained in excellent yields, with up to 99% ee.
متن کاملMicrowave assisted condensation reactions of 2-aryl hydrazonopropanals with nucleophilic reagents and dimethyl acetylenedicarboxylate.
The reaction of methyl ketones 1a-g with dimethylformamide dimethylacetal (DMFDMA) afforded the enaminones 2a-g, which were coupled with diazotized aromatic amines 3a,b to give the corresponding aryl hydrazones 6a-h. Condensation of compounds 6a-h with some aromatic heterocyclic amines afforded iminoarylhydrazones 9a-m. Enaminoazo compounds 12a,b could be obtained from condensation of 6c with s...
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ژورنال
عنوان ژورنال: Acta Chemica Scandinavica
سال: 1971
ISSN: 0904-213X
DOI: 10.3891/acta.chem.scand.25-0795