Nippon Soda Co., Ltd.

Fuminori Komatsu

Mitsuru Takase

Tomomi Kobayashi

Satoshi Kajita

Keiichiro Matsuda

Ryoji Wada

Ryoyo Nakashima

Yuki Hashimoto

Katsumi Okada

Shota Saito

A method for manufacturing a higher purity nitrile solvent by purifying a nitrile solvent containing an impurity, e.g an imine. The nitrile solvent may contain an imine and a conjugated diene, a carbonyl compound, or a high-boiling material as impurities. A method for purifying a nitrile solvent, such as isobutyronitrile, including bringing nitrile solvent containing an imine, e.g., as an impurity, into contact with an acidic aqueous solution having a pH of 3 or less, such as hydrochloric acid; bringing the nitrile solvent having been contacted with acidic aqueous solution into contact with an aqueous sodium hydrogen sulfite solution; bringing the nitrile solvent having been contacted with the aqueous sodium hydrogen sulfite solution into contact with an alkaline aqueous solution, such as an aqueous sodium hydroxide solution; and distilling the nitrile solvent having been contacted with the alkaline aqueous solution.

Method for purifying nitrile solvent

A compound represented by formula (I), wherein Arepresents a halogen ion, a benzenesulfonate ion, an alkylsulfonate ion or the like, X represents a halogeno group or the like, a is an integer of 0 to 4, Y represents a C1-C8 alkyl group or the like, b is an integer of 0 to 5. 

Pyridine-2-yl pyridinium compound and method of using same

A method for producing N-(2-amino-1,2-dicyanovinyl)imidates represented by the following formula (1-III) under low temperature conditions within a short period of time in high yield is provided. In addition, a method for producing N-(2-amino-1,2-dicyanovinyl)formamidine represented by the following formula (2-II) which is suitably applicable to a cyclization reaction for producing AlCN, AlCA or the like and which enhances yield of the cyclization reaction is provided. In addition, a method for producing aminoimidazole derivatives represented by the following formula (3-V) in high yield by using diaminomaleonitrile as a starting material is provided. 

Method for production of N-(2-amino-1,2-dicyanovinyl)imidates, method for production of N-(2-amino-1,2-dicyanovinyl)formamidine, and method for production of aminoimidazole derivatives

A method for producing N-(2-amino-1,2-dicyanovinyl)imidates represented by the following formula (1-III) under low temperature conditions within a short period of time in high yield is provided. In addition, a method for producing N-(2-amino-1,2-dicyanovinyl)formamidine represented by the following formula (2-II) which is suitably applicable to a cyclization reaction for producing AICN, AICA or the like and which enhances yield of the cyclization reaction is provided. In addition, a method for producing aminoimidazole derivatives represented by the following formula (3-V) in high yield by using diaminomaleonitrile as a starting material is provided. 

A method for producing N-(2-amino-1,2-dicyanovinyl)formamidine, including the steps of reacting an N-(2-amino-1,2-dicyanovinyl)formimidate and ammonia by adding aqueous ammonia to a solution or suspension of an N-(2-amino-1,2-dicyanovinyl)formimidate in ether, or alternatively directly adding an N-(2-amino-1,2-dicyanovinyl)formimidate or adding a solution or suspension of an N-(2-amino-1,2-dicyanovinyl)formimidate in ether to a liquid containing ether and aqueous ammonia.

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Joetsu, Japan

Fuminori Komatsu