摘要:
A process for producing &agr;-amino-dihalogenated methyl ketone derivatives by reacting an N-protected &agr;-amino acid ester with a dihalomethyl lithium is provided. This process is suitable for the production on an industrial scale and by this process, &agr;-amino-dihalogenated methyl ketone derivatives and &bgr;-amino-&agr;-hydroxycarboxylic acid derivatives can be obtained efficiently and economically advantageously.
摘要:
A process for producing &agr;-aminohalomethyl ketones or N-protected &agr;-aminohalomethyl ketones from specified 3-oxazolidin-5-one derivatives via 5-halomethyl-5-hydroxy-3-oxazolidine derivatives. By this process, &agr;-aminohalomethyl ketones and compounds relating to them can be obtained efficiently and economically in industrial scale.
摘要:
The present invention provides methods for producing a highly pure aromatic bromocarboxylic acid derivative and an aromatic acylthiocarboxylic acid derivative in high yields. The methods of the present invention include reacting an aromatic amino acid in an aqueous solvent in the presence of sodium nitrite, hydrogen bromide and at least one member selected from the group consisting of an aliphatic carboxylic acid and an alcohol, to give an aromatic bromocarboxylic acid derivative, and reacting the aromatic bromocarboxylic acid derivative and an organic thio acid in the presence of an amine to give an aromatic acylthiocarboxylic acid derivative.
摘要:
Novel intermediates of nucleoside derivatives, of which the 6-position of the nucleic acid base moiety is substituted with a halogen atom, are produced. Using those novel intermediates, even substrates, of which the 3'-position of the saccharide moiety is deoxylated, can be substituted at the 2'-position at an extremely high yield. Specifically, by subjecting a 3'-deoxy derivative of inosine to 6-halogenation to give a 6-halide of the derivative, and then subjecting it to 2'-deoxylation/substitution with a fluorine atom or the like, followed by further subjecting it to substitution with an amino group, a hydroxyl group or any other intended substituent at the 6-positioned halogen atom, nucleoside derivatives are produced at a high yield.Methods for producing nucleoside derivatives including 9-(2,3-dideoxy-2-fluoro-.beta.-D-threo-pentofuranosyl)adenine (FddA) and their related compounds, in a simplified manner, at a high yield and at low costs, and especially Economical methods for substituting substrates, of which the 3'-position of the saccharide moiety is deoxylated, at the 2'-position to produce those nucleoside derivatives on an industrial scale are also provided.
摘要:
A compound selected from the group consisting of(a) optically active 2-hydroxymethyl-3-phenylpropionic acid cis-1-amino-2-indanol salt,(b) optically active 2-hydroxymethyl-3-phenylpropionic acid .alpha.-methylbenzylamine salt,(c) optically active 2-hydroxymethyl-3-phenylpropionic acid 3-methyl-2-phenyl-1-butylamine salt,(d) a salt of (S)-2-hydroxymethyl-3-phenylpropionic acid with (1R, 2S)-(+)-cis-1-amino-2-indanol,(e) a salt of (R)-2-hydroxymethyl-3-phenylpropionic acid with (1S, 2R)-(-)-cis-1-amino-2-indanol,(f) a salt of (R)-2-hydroxymethyl-3-phenylpropionic acid with (S)-(-)-.alpha.-methylbenzylamine,(g) a salt of (S)-2-hydroxymethyl-3-phenylpropionic acid with (R)-(+)-.alpha.-methylbenzylamine,(h) a salt of (S)-2-hydroxymethyl-3-phenylpropionic acid with (S)-(-)-3-methyl-2-phenyl-1-butylamine, and(i) a salt of (R)-2-hydroxymethyl-3-phenylpropionic acid with (R)-(+)-3-methyl-2-phenyl-1-butylamine.
摘要:
The present invention provides a method for producing an inosine derivative represented by the following general formula (1) including the steps of subjecting an inosine derivative of general formula (3) to dithiocarbonylation and carrying out radical reduction of the obtained compound. According to the present invention there can be produced compounds useful as anti-AIDS drugs on industrial scale. wherein R1 may be the same or different and are each benzyl group, benzhydryl group or trityl group, each of which may have a substituent in general formulas (1) and (3).
摘要:
The present invention relates to a Variovorax sp. which produces an acylase having an asymmetric hydrolysis activity on an N-acetyl β-amino acid to selectively produce an R-β-amino acid, and a Burkholderia sp. which produces both an acylase having an asymmetric hydrolysis activity on an N-acetyl β-amino acid to selectively produce an S-β-amino acid and an acylase having an asymmetric hydrolysis activity of an N-acetyl β-amino acid to selectively produce an R-β-amino acid, and a process for the selective production of an S-, or R-β-amino acid using the above strains.
摘要:
The present invention provides a production method of 5-aminopyrimidine compound represented by the formula (5) by reacting a glycine compound represented by the formula (1) with t-butoxybisdimethylaminomethane, dimethylformamidedimethylacetal or dimethylformamidediethylacetal to produce a dialkylaminomethylene compound represented by the formula (2), reacting the compound of formula (2) in the presence of an acid to produce a hydroxymethylene compound represented by the formula (3), and reacting the compound of formula (3) with an amidine compound represented by the formula (4) or a salt thereof.
摘要:
Herein are disclosed a process for increasing in purity, or purifying, an N-protected-β-aminoalcohol which process comprises (i) adding water to a polar organic solvent in which an N-protected-β-aminoalcohol such as a (2R,3S)- or (2S,3R)-3-tert-butoxycarbonylamino-1-halo-2-hydroxy-4-phenylbutane or the like, or (ii) crystallizing such an N-protected-β-aminoalcohol from a diol or a diol-based mixed solvent, and a process for producing the corresponding N-protected-β-aminoepoxide which process comprises treating, with a base, the thus purity-enhanced N-protected-β-aminoalcohol. Such N-protected-β-aminoalcohols and N-protected-β-aminoepoxides are both useful as synthetic intermediates for medicine compounds, such as, e.g., HIV protease inhibitor and the like.
摘要:
The present invention relates to a process for the preparation of compound (XV), which includes hydrolysis of compound (I) to give compound (II), then reaction with reagent (III) to give compound (IV), then reaction with compound (V) to give compound (VI), then condensation with compound (XII) to give compound (XI), and preferably deprotection by an enzyme reaction. This method is useful for the preparation of a pyrimidine derivative and a synthetic intermediate, which is useful as an enzyme inhibitor.