Inhibitor protection of steels in acid and neutral media by the derivatives of 2-mercaptobenzimidazole
We study the anticorrosion properties of newly synthesized derivatives of 2-mercaptobenzimidazole and the efficiency of their action in compositions based on the wastes of production of ɛ-caprolactam at the Chernihiv “Khimvolokno” Open Joint-Stock Company. A conclusion is made that these compounds can be used as corrosion inhibitors for 20 steel placed in acid and neutral media. The efficiency of application of protective compositions based on the wastes of production of ɛ-caprolactam with admixtures of the derivatives of 2-mercaptobenzimidazole is demonstrated for working media with pH 1–6.5.
Abstract Asymmetric total synthesis of small ring macrolide stagonolide-E has been described in this communication. The main highlight of our synthetic strategy is the application of ME-DKR (metal enzyme combo dynamic kinetic resolution) reaction, asymmetric reduction with Noyori’s BINAL-H reagent system, stereoselective cross metathesis, and RCM (ring closing metathesis) reaction at a late stage enables us to achieve the synthesis of the target molecule in an efficient way.