Radical transformations of some N-alkylanilines by their oxidation with different agents: an EPR study
摘要:
N-Alkylanilines X-NH-Ph (Ph = substituted phenyl ring) with two different types of alkyl substituent X [X = C2H5-CO-CH2CH(Ph), X = CH3, C2H5, CH(CH3)(2), CH2C6H5] were oxidized using different agents. While oxidation with 3-chloroperbenzoic acid leads to production of the corresponding aminoxyl radicals X-NOaEuro cent-Ph, it was confirmed that application of PbO2 resulted in the formation of aminyl radicals X-N-aEuro cent-Ph, as indirectly proved by the spin-trapping method. Contrary to those transformations, with employment of either Pb(OAc)(4) or t-BuO (2) (aEuro cent) radical, reactions taking place on the alkyl substituent were also observed.
Mannich-type reactions of aromatic aldehydes, anilines, and methyl ketones in fluorous biphase systems created by rare earth (III) perfluorooctane sulfonates catalysts in fluorous media
作者:Wen-Bin Yi、Chun Cai
DOI:10.1016/j.jfluchem.2006.07.009
日期:2006.11
Rare earth (III) perfluorooctane sulfonates (RE(OPf)3) catalyze the three-component Mannich-type reactions of different ketones with various aromatic aldehydes and aromatic amines in fluorous media to give various β-arylamino ketones in good yields. By simple separation of the fluorous phase containing only catalyst, reaction can be repeated several times.
The Mannich Reaction of Butanone, Aromatic Aldehydes and Aromatic Amines
作者:Yi Lin、Zou Junhua、Lei Huangshu、He Qilin
DOI:10.1080/00397919108019818
日期:1991.10
Abstract Under the catalysis of small amount of concentrated hydrochloric acid, the Mannichreaction of butanone, aromatic aldehydes and aromatic amines can be carried out directly at 0–20°C. Twelve corresponding Mannich bases (1), 1-aryl-1-arylamino-3-pentanones, were prepared in high yields.
Effect of sodium dodecyl sulfate surfactant on regioselectivity and reversed diastereoselectivity of β-aminocarbonyl compounds in Mannich reaction
作者:Mahya Kohansal Moghadam、Hossein Eshghi
DOI:10.1016/j.molliq.2024.124133
日期:2024.3
Regioselective and diastereoselective synthesis of β-aminocarbonyl compounds is examined in the presence/ absence of sodium dodecylsulfate (SDS) as surfactant. Mannich reaction between derivatives of aniline, benzaldehyde and 2-butanone is performed in different conditions. The optimum condition are acquired include 1 mol % SDS per reactants in aqueous solvent at room temperature. Finding show conditions