Tokyo, Hongo, Bunkyo-ku, (3-Nitrostyrenes are diprotonated on the nitro group to yield N,N-dihydroxyiminium-benzyl dications in trifluoromethanesulfonic acid. These dications comprise a new class of reagents that can react with benzene. The reaction is dependent on the substituent (H or alkyl group)
Acid-catalyzed reactions of 1,2-Dicarbonylethanes with benzene. Ethylene dication electrophiles
β Scribed by Takahisa Yamazaki; Shin-ichi Saito; Tomohiko Ohwada; Koichi Shudo
- Publisher
- Elsevier Science
- Year
- 1995
- Tongue
- French
- Weight
- 212 KB
- Volume
- 36
- Category
- Article
- ISSN
- 0040-4039
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π SIMILAR VOLUMES
Non-enolizable thioketones and 1,2-epoxycycloalkanes undergo a Lewis acid catalyzed addition reaction to give 1,3-oxathiolanes. Appropriate reaction conditions are CH 2 Cl 2 as the solvent, BF 3 Β΄Et 2 O as the Lewis acid, and a temperature between Γ 788 and r.t. Under the reaction conditions, the 1,
The reaction of 4-methyl-1,2,4-triazoline-3,5-dione (MeTAD) with substituted benzenes under the influence of trifluoroacetic acid catalysis was investigated. Generally, good-to-high yields of 1-arylurazoles resulting from aromatic substitution were obtained. Successful reaction required moderately e
## Abstract The applicability of boric acid catalysis for the direct condensation of carboxylic acids with benzeneβ1,2βdiamine to give 2βsubstituted benzimidazoles was investigated. It was found that catalytic amounts (5β10β molβ%) of boric acid efficiently promote the cyclocondensation of aliphatic