摘要:
As new compounds are now provided N-methyl-3-(3,4-dihydroxyphenyl)serine alkyl esters which are effective as an .alpha.-adrenergic and .beta.-adrenergic agent to stimulate the .alpha.-adrenergic and .beta.-adrenergic functions of the central nervous system of mammalian animals and are expectable to be useful for therapeutic treatment of disorders as invoked by reduced biological activities or functions of the .alpha.- and/or .beta.-adrenergic neurons. N-methyl-L-threo-3-(3,4-dihydroxyphenyl)serine (C.sub.1 -C.sub.6) alkyl esters are preferred amongst the new compounds of this invention.
摘要:
DL- or L-Threo-3-(3,4-dihydroxyphenyl)-N-methyl-serine which may also be termed as DL- or L-threo-adrenalinecarboxylic acid are now provided, which are new compounds useful for therapeutic treatment of Parkinson's disease and mental depression disease. DL-Adrenalinecarboxylic acid may be produced by a new process comprising reacting glycine with O-protected 3,4-dihydroxybenzaldehyde, hydrolyzing the resultant reaction product under acidic conditions to form O-protected DL-3-(3,4-dihydroxyphenyl)serine, isolating the O-protected DL-3-(3,4-dihydroxyphenyl)serine into the threo isomer and the erythro isomer by recrystallization from a suitable organic solvent, introducing an unsubstituted or substituted benzyl group into the 2-amino group of the resulting O-protected DL-threo-3-(3,4-dihydroxyphenyl)serine, then N-methylating the resulting O-protected DL-threo-3-(3,4-dihydroxyphenyl )-N-benzylserine, and removing the O-protecting groups as well as the unsubstituted or substituted benzyl group at the 2-methylamino group of the N-methylation product.L-Adrenalinecarboxylic acid may be produced by a new process comprising introducing a p-methoxybenzyloxycarbonyl group into the 2-amino group of the O-protected DL-threo-3-(3,4-dihydroxyphenyl)serine obtained as an intermediate product, optically resolving the resultant O-protected DL-threo-3-(3,4-dihydroxyphenyl)-N-p-methoxybenzyloxycarbonyl-serine by reacting the latter with an optically active amine and recrystallizing the resultant amine salt products from a suitable organic solvent, removing the p-methoxy-benzyloxycarbonyl group from the resultant O-protected L-threo-(3,4-dihydroxyphenyl)-N-p-methoxybenzyloxycarbonyl-serine, reacting the resultant O-protected L-threo-(3,4-dihydroxyphenyl)serine with dimethyl sulfate in dry acetone to form an O-protected L- or D-threo-(3,4-dihydroxyphenyl)-N-methylserine methyl ester, saponifying this methyl ester and then removing the O-protecting groups from the saponification product.
摘要:
L-aminoacylases S.sub.1 and S.sub.2 derived from actinomycetes and having physicochemical characteristics such that it is a L-aminoacylase which acts on a N-acyl-L-amino acid to give a L-amino acid, its substrate profile is wide, and it acts not only on a N-acyl derivative of a natural L-amino acid, but also on a N-acyl derivative of a synthetic L-amino acid, while it does not act on a N-acyl-D-amino acid, a DL-N-acetyl-.alpha.methylbenzylamine and a N-acetyl-D-glucosamine, etc.
摘要:
N-acyl-DL-3-(3,4-dihydroxyphenyl)serine or a catecholic hydroxyl-protected derivative thereof is stereospecifically de-acylated by reaction with a microorganism of the genus Streptomyces or Streptoverticillium having an acylase or with an extract of said microorganism containing said acylase, to produce L-3-(3,4-dihydroxyphenyl)serine or the hydroxyl-protected derivative thereof, with the N-acyl-D-3-(3,4-dihydroxyphenyl)serine compound remaining unaltered. The L-3-(3,4-dihydroxyphenyl)serine compound so produced can be separated from the N-acyl-D-3-(3,4-dihydroxyphenyl)serine compound owing to the difference in the properties of them.
摘要:
A new compound is produced which has the general formula: ##STR1## wherein R represents hydrogen atom or a lower alkyl group and which exhibits an immunopotentiating activity. This new compound as well as its pharmaceutically acceptable salts and hydrates are useful for immunotherapy and treatment of immune diseases and disorders in living animals including human beings. The new compound can be produced by reduction of a hydroxyterephthalic acid alkyl ester or by esterification of the corresponding 3-hydroxy-4-(hydroxymethyl)-benzoic acid.
摘要:
A novel physiologically active peptide Val--X--Ala--X, in which X is 4-amino-3-hydroxy-6-methylheptanoic acid, which is prepared from R--Val--Val--X--Ala--X by the action of a microbial enzyme, N-acyl derivatives thereof which are produced by acylating said new peptide, and the processes for producing thereof and the microbial enzyme are disclosed.
摘要:
A new compound having the formula ##STR1## and now designated forphenicinol is produced, which exhibits an immunopotentiating activity. This new compound as well as its pharmaceutically acceptable salts and hydrates are useful for immunotherapy and treatment of immune diseases and disorders in living animals, including human beings. The new compound can be produced by hydrolysis of the corresponding aminonitrile compound of the formula ##STR2## or by reduction of forphenicine.
摘要:
A 5-substituted amino-4-hydroxy-pentenoic acid or its salt represented by the formula: ##STR1## wherein each of R.sup.1 and R.sup.2 which may be the same or different is a hydrogen atom, a lower alkyl group, an aralkyl group, a lower alkoxycarbonyl group, an aryloxycarbonyl group, an aralkyloxycarbonyl group or a lower alkanoyl group which may be substituted by from one to three substituents selected from the group consisting of an amino group, a hydroxyl group, a carboxyl group, an aryloxy group, an aralkyloxycarbonylamino group, a lower alkoxycarbonylamino group and a ##STR2## group (wherein each of X.sup.1 and X.sup.2 which may be the same or different is a hydrogen atom, a lower alkyl group, an aryl group or an aralkyl group, or X.sup.1 and X.sup.2 form together with the adjacent nitrogen atom a 5- or 6-membered heterocyclic group which may further contain a hetero atom selected from the group consisting of a nitrogen atom, an oxygen atom and a sulfur atom) and which may further contain a double bond in its carbon chain, each of R.sup.3, R.sup.4 and R.sup.6 which may be the same or different is a hydrogen atom, a lower alkyl group, a cycloalkyl group, a cycloalkylalkyl group, an aryl group, an aralkyl group or a residue of an acidic neutral or basic amino acid, R.sup.5 is a hydrogen atom or a lower alkyl group, R.sup.7 is a hydrogen atom, a lower alkyl, cycloalkyl, cycloalkylalkyl or aralkyl group which may be substituted by one or two hydroxyl groups or a residue of an acidic, neutral or basic amino acid, R.sup.8 is a hydroxymethyl group or a --CO--R.sup.9 group (wherein R.sup.9 is a hydroxyl group, a --OY group (wherein Y is a lower alkyl group, an aryl group, an aralkyl group, a lower alkoxyalkyl group, a lower alkanoyloxyalkyl group, a lower alkoxycarbonyloxyalkyl group, or a 1-phthalidyl group) or ##STR3## group (wherein each of Y.sup.1 and Y.sup.2 which may be the same or different is a hydrogen atom, a lower alkyl group, an aryl group, an aralkyl group or a cycloalkyl group, or Y.sup.1 and Y.sup.2 form together with the adjacent nitrogen atom a 5- or 6-membered heterocyclic group which may further contain a hetero atom selected from the group consisting of a nitrogen atom, an oxygen atom and a sulfur atom), and each of n and m which may be the same or different is 0 or 1.
摘要:
An N-acylamino acid derivative of the formula: ##STR1## wherein each of R.sup.1, R.sup.2, R.sup.4 and R.sup.6 is hydrogen lower alkyl, cycloalkyl, cycloalkylalkyl, aryl, aralkyl or a monocyclic or bicyclic heterocyclic group containing from to 4 hetero atoms; each of R.sup.3 and R.sup.5 is hydrogen or lower alkyl; A is --CH(OH)--(CH.sub.2).sub.q R.sup.7 wherein R.sup.7 is hydrogen, lower alkyl, cycloalkyl, cyloalkylalkyl, aryl, aralkyl, a monocyclic or bicyclic heterocyclic group containing from to 4 hereto atoms or --E--R.sup.10 wherein E is --S(O).sub.i -- wherein i is 0, 1 or 2, oxygen, --NR.sup.11 -- wherein R.sup.11 is hydrogen, lower alkyl, cycloalkyl, cycloalkylalkyl, aryl or aralkyl, or ##STR2## wherein each of R.sup.12 and R.sup.13 is hydrogen, lower alkyl cycloalkyl, cycloalkylalkyl, aryl or aralkyl, and R.sup.10 is hydrogen, lower alkyl, cycloalkyl, cycloalkylalkyl, aryl, aralkyl or a monocyclic or bicyclic heterocyclic group containing from 1 to 4 hetero atoms provided that when R.sup.10 is hydrogen, i is 0, and a is an integer of from 0 to 5; or --CH.sub.2 --CHR.sup.8 --CO--R.sup.9 wherein R.sup.8 is hydrogen, lower alkyl, cycloalkyl, cycloalkylalkyl, aryl, aralkyl or a monocyclic or bicyclic heterocyclic group containing from 1 to 4 hetero atoms, and R.sup.9 is hydroxyl, --OX wherein X is alkyl, aryl, lower alkoxycarbonyloxyalkyl or 1-phthalidyl, or --N(Y.sup.1) (Y.sup.2) wherein each of Y.sup.1 and Y.sup.2 is hydrogen, lower alkyl, aryl, aralkyl or cycloalkyl, or Y and.sup.1 and Y.sup.2 form together with the adjacent nitrogen atom a 5- or 6-membered heterocyclic group which may contain a further hereto atom; m is 0, 1 or 2; and n is an integer of from 1 to 5, provided that when R.sup.1 is hydrogen, m is 0; or a salt thereof, which is useful as hypotensive drugs.
摘要:
An N-acylamino acid derivative of the formula: ##STR1## wherein the substituents are herein defined or a salt thereof, which is useful as hypotensive drugs.