N-Methylation of 2-Furylhenzothiazoles. The Influence of Substituents on the Rate of Quaternization

Quaternization of several 2-furylbenzothiazoles with dimethylsulphate in dioxane has been studied. The noticeable substituent dependence of the rate of methylation has been observed. The substituents (CHa, Br, Cl) have been located at position 5 of the furane nucleus and/or position 6 of the benzo-ring

N-Methylation of 2-Furylhenzothiazoles. The Influence of Substituents on the Rate of Quaternization

Quaternization of several 2-furylbenzothiazoles with dimethylsulphate in dioxane has been studied. The noticeable substituent dependence of the rate of methylation has been observed. The substituents (CHa, Br, Cl) have been located at position 5 of the furane nucleus and/or position 6 of the benzo-ring

Synthesis and Photochemical Behaviour of Substituted 3,4-furandicarboxdianilides

Same substituted 3,4-furandicarboxdianilides were prepared from the corresponding substituted anilines and 3,4-furandicarboxylic acid dichloride. All compounds were exposed to UV irradiation in methanolic solution, but under the conditions applied only p-chloro- substituted dianilide dehydrocyclized to the corresponding furo-bis-quinolone

Thioamides. XV. Some New Substituted 2-(2- or 3-Furyl)benzothiazoles. The Preparation and Properties

A number of 2-substituted benzothiazoles with 2-furyl- (Figure 1.) or 3-furyl- (Figure 2.) group as a substituent were prepared by the oxidative cyclization of corresponding thioanilides. Some of the prepared benzothiazoles were converted to N-methyl derivatives with dimethylsulphate. The compounds were isolated as quarternary salts. The influence of substituents on the basicity of the benzothiazole nucleus and on the rate of quarternization was established

Thioamides. XV. Some New Substituted 2-(2- or 3-Furyl)benzothiazoles. The Preparation and Properties

A number of 2-substituted benzothiazoles with 2-furyl- (Figure 1.) or 3-furyl- (Figure 2.) group as a substituent were prepared by the oxidative cyclization of corresponding thioanilides. Some of the prepared benzothiazoles were converted to N-methyl derivatives with dimethylsulphate. The compounds were isolated as quarternary salts. The influence of substituents on the basicity of the benzothiazole nucleus and on the rate of quarternization was established