Abstract: The present invention aims to provide an electrolyte solution for a lithium-air cell, the electrolyte solution having excellent chemical stability and a high withstand voltage and being in a stable liquid state without undergoing precipitation of salts or coagulation over a broad temperature range. The present invention also aims to provide a lithium-air cell which is produced using the electrolyte solution for a lithium-air cell and has excellent long-term reliability and good charge-discharge cycle characteristics. The present invention relates to an electrolyte solution for a lithium-air cell, the electrolyte solution containing: an organic solvent that contains a chain alkyl sulfone compound represented by Formula (1): wherein R1 and R2 independently represent a straight-chain or branched-chain alkyl group containing 1 to 4 carbons and may be the same as or different from each other; and a lithium salt.

Abstract: The present invention aims to provide an electrolyte solution for a lithium-air cell, the electrolyte solution having excellent chemical stability and a high withstand voltage and being in a stable liquid state without undergoing precipitation of salts or coagulation over a broad temperature range. The present invention also aims to provide a lithium-air cell which is produced using the electrolyte solution for a lithium-air cell and has excellent long-term reliability and good charge-discharge cycle characteristics. The present invention relates to an electrolyte solution for a lithium-air cell, the electrolyte solution containing: an organic solvent that contains a chain alkyl sulfone compound represented by Formula (1): wherein R1 and R2 independently represent a straight-chain or branched-chain alkyl group containing 1 to 4 carbons and may be the same as or different from each other; and a lithium salt.

Abstract: The present invention provides a process for producing (E)-N-monoalkyl-3-oxo-3-(2-thienyl)propenamine represented by Formula (1); wherein R is a C1-4 alkyl, the method comprising the steps of: maintaining a solution containing (Z)—N-monoalkyl-3-oxo-3-(2-thienyl)propenamine dissolved therein at 25° C. or below to deposit crystals and separating crystals having a particle diameter of 100 ?m or less from the deposited crystals; and a process for producing (E,Z)—N-monoalkyl-3-oxo-3-(2-thienyl)propenamine comprising the steps of: reacting an alkali metal salt of ?-oxo-?-(2-thienyl)propanal with a monoalkylamine compound; adding a water-insoluble organic solvent to the resulting reaction mixture; adding seed crystals containing (E)-N-monoalkyl-3-oxo-3-(2-thienyl)propenamine to an organic layer obtained by conducting separation; and keeping the resulting mixture at 25° C. or below.

Abstract: It is to provide an electrolyte solution for a dye sensitized solar cell that does not generate a gas, can be used in a wide temperature range, and is excellent in durability. The electrolyte solution contains a chain sulfone compound represented by formula (1) as a solvent. (In the formula, R1 and R2 each independently represent an alkyl group having from 1 to 12 carbon atoms, which may be partially substituted by a halogen, an alkoxy group or an aromatic ring, an alkoxy group, or a phenyl group.

Abstract: The present invention provides a process for producing (E)-N-monoalkyl-3-oxo-3-(2-thienyl)propenamine represented by Formula (1); wherein R is a C1-4 alkyl, the method comprising the steps of: maintaining a solution containing (Z)—N-monoalkyl-3-oxo-3-(2-thienyl)propenamine dissolved therein at 25° C. or below to deposit crystals and separating crystals having a particle diameter of 100 ?m or less from the deposited crystals; and a process for producing (E,Z)—N-monoalkyl-3-oxo-3-(2-thienyl)propenamine comprising the steps of: reacting an alkali metal salt of ?-oxo-?-(2-thienyl)propanal with a monoalkylamine compound; adding a water-insoluble organic solvent to the resulting reaction mixture; adding seed crystals containing (E)-N-monoalkyl-3-oxo-3-(2-thienyl)propenamine to an organic layer obtained by conducting separation; and keeping the resulting mixture at 25° C. or below.

Abstract: An object of the present invention is to provide a method for preparation of an alkyl sulfone compound simply and safely with high yield, and an alkyl sulfone compound. The present invention is a method for preparing an alkyl sulfone compound represented by formula (2), comprising: oxidizing an alkyl sulfide compound represented by formula (1) using an oxidizing agent in the presence of a tungstate catalyst: in formula (1), R1 represents a C1-C3 alkyl group, and R2 represents a C3-C5 alkyl group, in formula (2), R1 and R2 are the same alkyl groups as R1 and R2 in formula (1), respectively.

Abstract: The present invention provides a process for producing (E)-N-monoalkyl-3-oxo-3-(2-thienyl)propenamine represented by Formula (1); wherein R is a C1-4 alkyl, the method comprising the steps of: maintaining a solution containing (Z)-N-monoalkyl-3-oxo-3-(2-thienyl)propenamine dissolved therein at 25° C. or below to deposit crystals and separating crystals having a particle diameter of 100 ?m or less from the deposited crystals; and a process for producing (E,Z)-N-monoalkyl-3-oxo-3-(2-thienyl)propenamine comprising the steps of: reacting an alkali metal salt of ?-oxo-?-(2-thienyl)propanal with a monoalkylamine compound; adding a water-insoluble organic solvent to the resulting reaction mixture; adding seed crystals containing (E)-N-monoalkyl-3-oxo-3-(2-thienyl)propenamine to an organic layer obtained by conducting separation; and keeping the resulting mixture at 25° C. or below.

Abstract: The present invention provides a process for producing an N-monoalkyl-3-hydroxy-3-(2-thienyl)propanamine represented by General Formula (2): wherein R is C1-4 alkyl, comprising the step of reducing (Z)-N-monoalkyl-3-oxo-3-(2-thienyl)propenamine represented by General Formula (1): wherein R is as defined above. According to the present invention, an N-monoalkyl-3-hydroxy-3-(2-thienyl)propanamine which is for use as an intermediate for various pharmaceuticals can be produced in an industrially inexpensive and easy manner.

Abstract: The present invention provides a process for producing (E)-N-monoalkyl-3-oxo-3-(2-thienyl)propenamine represented by Formula (1); wherein R is a C1-4 alkyl, the method comprising the steps of: maintaining a solution containing (Z)-N-monoalkyl-3-oxo-3-(2-thienyl)propenamine dissolved therein at 25° C. or below to deposit crystals and separating crystals having a particle diameter of 100 ?m or less from the deposited crystals; and a process for producing (E,Z)-N-monoalkyl-3-oxo-3-(2-thienyl)propenamine comprising the steps of: reacting an alkali metal salt of ?-oxo-?-(2-thienyl)propanal with a monoalkylamine compound; adding a water-insoluble organic solvent to the resulting reaction mixture; adding seed crystals containing (E)-N-monoalkyl-3-oxo-3-(2-thienyl)propenamine to an organic layer obtained by conducting separation; and keeping the resulting mixture at 25° C. or below.

Abstract: The present invention provides a process for producing an N-monoalkyl-3-hydroxy-3-(2-thienyl)propanamine represented by General Formula (2): wherein R is C1-4 alkyl, comprising the step of reducing (Z)-N-monoalkyl-3-oxo-3-(2-thienyl)propenamine represented by General Formula (1): wherein R is as defined above. According to the present invention, an N-monoalkyl-3-hydroxy-3-(2-thienyl)propanamine which is for use as an intermediate for various pharmaceuticals can be produced in an industrially inexpensive and easy manner.