In 2019,Separation Science plus included an article by Hidalgo-Serrano, Miriam; Borrull, Francesc; Marce, Rosa M.; Pocurull, Eva. Electric Literature of C7H9NO2S. The article was titled 《Presence of benzotriazoles, benzothiazoles and benzenesulfonamides in surface water samples by liquid chromatography coupled to high-resolution mass spectrometry》. The information in the text is summarized as follows:
An anal. method has been developed for the simultaneous determination of seven benzotriazole, five benzothiazole and four benzenesulfonamide derivatives in surface water samples. The procedure is based on solid-phase extraction with Oasis HLB, followed by high-performance liquid chromatog. coupled to high-resolution mass spectrometry. Apparent recoveries ranged from 40 to 101%, except for compounds the matrix effect of which was above -60%. The repeatability (n = 5) of the method was below 20% for all compounds except 4-hydroxybenzotriazole in river water. The method limits of detection for most compounds ranged from 1 to 12 ng/L for both river water and seawater. The method was then used for the determination of the studied compounds in several river water and seawater samples from harbor and coastal areas. 1-H-Benzotriazole (up to 78 ng/L in river water and above the upper limit of the calibration curve in seawater) and 4-methyl-1-H-benzotriazole (up to 44 ng/L in river water and 338 ng/L in seawater) were the most abundant compounds quantified in the samples, even though 5-methyl-1-H-benzotriazole and 2-hydroxybenzothiazole were also found in most samples. Some compounds were frequently found in certain types of samples, such as 2-aminobenzothiazole in river water. Benzenesulfonamide derivatives could not be quantified in any sample. In the experimental materials used by the author, we found 4-Methylbenzenesulfonamide(cas: 70-55-3Electric Literature of C7H9NO2S)
4-Methylbenzenesulfonamide(cas: 70-55-3) belongs to anime. Primary amines having a tertiary alkyl group (R3CNH2) are difficult to prepare with most methods but are made industrially by the Ritter reaction. In this method a tertiary alcohol reacts with hydrogen cyanide (HCN) in the presence of a concentrated strong acid; a formamide, RNH―CHO, is formed first, which then undergoes hydrolysis.Electric Literature of C7H9NO2S
Referemce:
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics