摘要:
Disclosed is a preparation method which makes it possible to produce an aminoalcohol derivative having a high optical purity and to enable the large scale synthesis thereof at a low price.For instance, a compound represented by the following general formula (8) is recrystallized in the course of the production process thereof: In this case, R1 represents, for instance, a trihalomethyl group; R2 represents, for instance, a hydrogen atom; R3 represents, for instance, a halogen atom; R4 represents, for instance, a lower alkyl group; X represents, for instance, a sulfur atom; n represents an integer ranging from 1 to 4; and W represents hydrogen chloride or hydrogen bromide.
摘要:
Disclosed is a benz[d][1,3]oxazine derivative having excellent stability when used as an active ingredient for a medicinal agent, and also having excellent solubility and crystallinity. Specifically disclosed is 2-[2-((S)-3-dimethylaminopyrrolidin-1-yl)pyridin-3-yl]-5-ethyl-7-methoxy-4H-benz[d][1,3]oxazin-4-one maleate.
摘要:
[Problem]To provide a stable industrially-manufactured intermediate, enabling an industrially stable supply of 2-pyridyl-benz[d][1,3]oxazine to be provided.[Solution]The compound represented by formula (6) (wherein M represents sodium or potassium).
摘要:
A process for the industrial production of 2-amino-2-[2-[4-(3-benzyloxyphenylthio)-2-chlorophenyl]ethyl]-1,3-propanediol hydrochloride (Compound I), an effective immunosuppressant.The process for producing 2-amino-2-[2-[4-(3-benzyloxyphenylthio)-2-chlorophenyl]ethyl]-1,3-propanediol hydrochloride or a hydrate thereof includes the steps of reacting 4-(3-benzyloxyphenylthio)-2-chlorobenzaldehyde with ethyl diethylphosphonoacetate in a solvent in the presence of a base to form ethyl 3-[4-(3-benzyloxyphenylthio)-2-chlorophenyl]acrylate; reducing the resulting ethyl 3-[4-(3-benzyloxyphenylthio)-2-chlorophenyl]acrylate, followed by mesylation, iodination and nitration, to form 1-benzyloxy-3-[3-chloro-4-(3-nitropropyl)phenylthio]benzene; forming 2-[2-[4-(3-benzyloxyphenylthio)-2-chlorophenyl]ethyl]-2-nitro-1,3-propanediol using a formaldehyde solution; and reducing the resulting 2-[2-[4-(3-benzyloxyphenylthio)-2-chlorophenyl]ethyl]-2-nitro-1,3-propanediol to form the desired product.
摘要:
[Problem] To efficiently (without carrying out column purification) provide a high-purity maleate having excellent storage stability, solubility, crystallinity and ease of handling according to the present invention.[Solution] This method for producing the maleate represented by formula (1) includes obtaining the compound represented by formula (2) by reacting the compound represented by formula (3) with the compound represented by formula (4) in the presence of a salt, precipitating crystals of the compound represented by formula (2) by mixing the obtained compound represented by formula (2) with acetone and water, and obtaining the maleate represented by formula (1) by adding maleic acid to an acetone solution of the compound represented by formula (2), prepared by dissolving the crystals of the obtained compound represented by formula (2) in acetone.
摘要:
A process for the industrial production of 2-amino-2-[2-[4-(3-benzyloxyphenylthio)-2-chlorophenyl]ethyl]-1,3-propanediol hydrochloride (Compound I), an effective immunosuppressant.The process for producing 2-amino-2-[2-[4-(3-benzyloxyphenylthio)-2-chlorophenyl]ethyl]-1,3-propanediol hydrochloride or a hydrate thereof includes the steps of reacting 4-(3-benzyloxyphenylthio)-2-chlorobenzaldehyde with ethyl diethylphosphonoacetate in a solvent in the presence of a base to form ethyl 3-[4-(3-benzyloxyphenylthio)-2-chlorophenyl]acrylate; reducing the resulting ethyl 3-[4-(3-benzyloxyphenylthio)-2-chlorophenyl]acrylate, followed by mesylation, iodination and nitration, to form 1-benzyloxy-3-[3-chloro-4-(3-nitropropyl)phenylthio]benzene; forming 2-[2-[4-(3-benzyloxyphenylthio)-2-chlorophenyl]ethyl]-2-nitro-1,3-propanediol using a formaldehyde solution; and reducing the resulting 2-[2-[4-(3-benzyloxyphenylthio)-2-chlorophenyl]ethyl]-2-nitro-1,3-propanediol to form the desired product.