At interaction of hydrogen sulphide with piperidino-2,3-epoxyprorane there is formed piperidino-2hydroxypropanthiol-3. The latter reacts by Mannich with formaldehyde and secondary aliphatic and heterocyclic amines, as well with organic halogenide, forming respectively aminomethyl and organylsulphide derivatives of piperidino-2-hydroxypropanethiol-3. Composition and structure of synthesized compounds are confirmed by elemental analysis and method NMR.

The electrochemical corrosion prevention of engines and mechanisms is a task of great national, economic and defense importance. Lubricating oils commonly used in engineering do not have sufficient protective properties and are unable to effectively protect it from corrosion, both during operation and during short-term and long-term inactivity. One of the simplest and most rational ways to solve this problem is the use of lubricants containing effective protective (conservation) additives, which, without worsening the normal working properties of oils provide them conservation properties. By the action of 3-mercapto-2- hydroxypropyl-1-isobutyl ether, taken as a synthon, with secondary aliphatic and heterocyclic amines under the conditions of the Mannich reaction, a number of aminomethyl derivatives were synthesized. Aminomethyl derivatives of 3-mercapto-2-hydroxypropyl-1-isobutyl ether are dissolved well in oils and are stable during storage. The protective properties of the synthesized compounds were studied in M-12 oil. The best test results were obtained with 3-piperidinomethilthio-2-hydroxypropyl-1-isobutyl ether - at a concentration of 1% to the lubricating oil M-12, the corrosion of a steel plate in a humid chamber is 3%, in sea water after 24 hours – 5%, the corrosion of a steel plate under the action of a 0.1% acid solution HBr – 3,5%. These results are higher than those of the standard - industrial additive urea succinimide. (SIM).

Реакцией 3-меркапто-2-гидроксипропилморфолина с органилгалогенидами в присутствии гидроокиси натрия синтезированы ранее неописанные сульфиды. Состав и структура синтезированных сульфидов определены элементным анализом и ЯМР-спектроскопией. Сульфиды хорошо растворяются в маслах и стабильны при хранении. Синтезированные соединения исследованы в качестве защитных присадок в масле М-12 по ГОСТ 9.054-75: при повышенных значениях относительной влажности, температуры воздуха, без конденсации; с периодической или постоянной конденсацией влаги (в камерах Г-4); при постоянном погружении в электролит; при воздействии 0.1% раствора бромистоводородной кислоты. Установлена высокая эффективность исследованных соединений. Выявлена взаимосвязь эффективности синтезированных соединений от их состава и структуры.