Method for synthesizing plasticizer 3-nitro furazan-4-methyl ether

Abstract

The invention discloses a method for synthesizing plasticizer 3-nitro furazan-4-methyl ether. The method comprises the following steps: adding hydroxylamine under the alkaline condition by taking ethyl cyanoacetate as a starting material to form a ring, so as to obtain 3-amino furazan-4-carboxylic acid; then, reducing carboxyl group on the furazan ring to an alcoholic extract hydroxyl group by using a sodium borohydride/zinc chloride system, so as to obtain 3-amino furazan-4-methanol; then, oxidizing an amino group on the furazan ring to a nitro group by using a hydrogen peroxide/concentrated sulphuric acid system, so as to obtain 3-nitro furazan-4-methanol; in the presence of pyridine, carrying out chloride substituent on the alcoholic extract hydroxyl group by using thionyl chloride, so as to obtain 3-nitro-4-chloromethyl methyl ether furazan; and finally, reacting 3-nitro-4-chloromethyl methyl ether furazan with sodium methoxide in acetonitrile to remove NaCl so as to obtain the target compound. Compared with the traditional nitrate plasticizer, the plasticizer synthesized by using the method has higher positive enthalpies of formation and thermal stability, lower sensitivity and melting point, and has potential application prospect in the field of solid propellants.

Description

technical field [0001] The invention belongs to the technical field of plastic additives, and relates to the synthesis of a plasticizer, in particular to a method for synthesizing the plasticizer 3-nitrofurazan-4-methyl ether. Background technique [0002] The main components that determine the energy of solid propellants are oxidizers, binders, plasticizers and fuels. The binder system composed of binders and plasticizers is the basis for solid propellants to have mechanical and processing properties. Nitrate is one of the plasticizers with the highest energy density at present, but this type of compound is sensitive to heat, mechanical action and chemical substances. The currently developed nitrate solid propellants are all Class I and Class II dangerous goods, and there are Delayed detonation and other dangerous phenomena whose mechanism is not fully understood. [0003] Furazan compounds are a popular research object in the field of energetic materials in recent years. ...

AI Technical Summary

Problems solved by technology

Nitrate is one of the plasticizers with the highest energy density at present, but this type of compound is sensitive to heat, mechanical action and chemical substances. The currently developed nitrate solid propellants are all Class I and Class II dangerous goods, and there are Delayed detonation and other dangerous phenomena whose mechanism is not fully understood