Abstract:
Disclosed is a method for producing a 4-cyanotetrahydropyran-4-carboxylic acid ester represented by the general formula (4a) or (4b) below, which is characterized in that a bis(2-halogenoethyl) ether represented by the general formula (1) below, a cyanoacetic acid ester represented by the general formula (2) below and an alkali metal alkoxide represented by the general formula (3) below are reacted in an organic solvent. (1) (In the formula, X represents a halogen atom.) (2) (In the formula, R 1 represents an alkyl group having 2-6 carbon atoms.) (3) (In the formula, R 2 may be the same as or different from R 1 and represents an alkyl group having 1-6 carbon atoms, and M represents an alkali metal atom.) (4a) (4b) (In the formulae, R 1 and R 2 are as defined above.) Also disclosed is a method for producing 4-cyanotetrahydropyran represented by the formula (5), which is characterized in that at least one 4-cyanotetrahydropyran-4-carboxylic acid ester is reacted in a solvent. Further disclosed is a method for producing tetrahydropyran-4-carboxylic acid amide represented by the general formula (6), which is characterized in that the 4-cyanotetrahydropyran and a base are reacted in a solvent.
Abstract:
This invention provides a 2-substituted-3-(4-tetrahydropyranyl)-3-oxopropanoic ester represented by general formula (1) wherein Y represents a halogen atom or an acyloxy group, and R represents a hydrocarbon group, and a process for producing the same.
Abstract:
A process for producing an alkyl 3-(4-tetrahydropyranyl)-3-oxopropionate compound represented by the formula (1): (1) (wherein R and R may be the same or different and each represents a group not participating in the reaction, provided that R and R may be bonded to each other to form a ring optionally containing a heteroatom therein; and R represents a hydrocarbon group), characterized by reacting a 4-acyltetrahydropyran represented by the formula (2): (2) (wherein R and R have the same meanings as defined above) with a carbonic diester represented by the formula (3): (3) (wherein R has the same meaning as defined above, provided that the two R 's may be bonded to each other to form a ring) in the presence of a base. Also provided is a process for producing the 4-acyltetrahydropyran.
Abstract:
A method for producing N,N'-dialkoxy-N,N'-dialkyl oxamide represented by the general formula (3): wherein R and R are as defined below, is characterized in that an oxalate diester represented by the general formula (1): wherein R and R may be the same or different and respectively represent a hydrocarbon group, is reacted with N-alkyl-O-alkylhydroxylamine represented by the general formula (2): R O
Abstract translation:由通式(3)表示的制备N,N'-二烷氧基-N,N'-二烷基草酰胺的方法:其中R 2和R 3如下所定义,其特征在于草酸二酯表示 通式(1)表示:其中R 1和R 1'可以相同或不同并分别表示烃基,与由通式(2)表示的N-烷基-O-烷基羟胺反应, :R 2 O
Abstract:
A process for producing a (3R,5S)−7−substituted−3,5&minu s;dihydroxyhept−6−enoic acid represented by the formula (5) which comprises optically resolving with an achiral amine compound a mixture of optical isomers of a 7−substituted 3,5−dihydroxyhept−6−enoic acid represented by the formula (1). (1) (5)
Abstract:
Disclosed is a commercially suitable method for producing a 1-substituted-5-acylimidazole compound. A 1-substituted-5-acylimidazole compound is produced with a high position selectivity by reacting an N-substituted amidine compound or a salt thereof with a ketone compound in the presence of a base.