摘要:
2-Amino-4-(hydroxy)(methyl)phosphinoylbutyric acid, which earlier nomenclature referred to as 2-amino-4-methylphosphinobutyric acid or its metal salts, or acid-addition salts thereof are used as perennial weeds and brush controlling agents. The L-isomer is twice effective than the racemic acid. The perennial weeds and brush controlling effect may be obtained by foliar application over a prolonged period and maY be surprisingly enhanced by using the compound with a herbicide or synergist selected from the group consisting of choline salt of maleic hydrazide, a phenoxy series herbicide, a benzoic acid series herbicide, 2,3,6-trichlorophenylacetic acid or a salt thereof, (3,5,6-trichloro-2-pyridyl)oxyacetic acid or a salt thereof, N-phosphonomethylglycine or a salt thereof, ethylcarbamoylphosphoric acid or a salt thereof, 2-(1-allyloxyaminobutylidene)-5,5-dimethyl-4-methoxycarbonyl-cyclohexane-1,3-dione, 3-(3,4-dichlorophenyl)-1-methoxy-1-methylurea,3-amino-1,2,4-triazole, choline or a salt thereof, and diethylamine or a salt thereof.
摘要:
A chemotherapeutic, antibacterial agent, 7.beta.-[(2D-2-amino-2-carboxy)ethylthioacetamido]-7.alpha.-methoxy-3-[(1-methyl-1H-tetrazole-5-yl)thiomethyl]-3-cephem-4-carboxylic acid is produced economically and efficiently starting from cephamycin A and/or B by a "new route" process comprising the consecutive steps of reaction of cephamycin with 5-mercapto-1-methyl-1H-tetrazole; protection of the terminal amino group thereof by acylation; protection of the two carboxyl groups thereof by esterification; replacement of the acyl group initially having attached to the 7-amino group by a halogenoacetyl group; deprotection of the blocked 4-carboxyl group; and condensation of D-cysteine with the halogenoacetyl group attaching to the 7-amino group.
摘要:
PCT No. PCT/JP78/00058 Sec. 371 Date June 15, 1979 Sec. 102(e) Date June 15, 1979 PCT Field Dec. 18, 1978 PCT Pub. No. WO79/00405 PCT Pub. Date July 12, 1979This invention relates to a novel process for preparing D,L-2-amino-4-methylphosphinobutyric acid having herbicidal and antifungicidal activities which comprises subjecting acrolein to reaction with a dialkyl phosphonite to synthesize an acetal of an ester of 3-oxopropylmethylphosphinic acid; treating the thus obtained compound with an acid for deacetalization to obtain an ester of 3-oxopropylmethylphosphinic acid and then applying the Strecker's process used for amino synthesis to the thus obtained ester.
摘要:
5-Alkoxy-picolinic acids and the salts and the esters thereof represented by the formula (I): ##STR1## wherein R represents an alkyl group having 1 to 6 carbon atoms and M represents a hydrogen atom; a calcium atom; a sodium atom; a potassium atom; an aluminum atom; an unsubstituted phenyl group; a phenyl group substituted with one or more of an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms or a halogen atom (such as a chlorine, bromine, iodine, etc., atom); a phthalidyl group; an alkoxyalkyl group wherein the alkyl moiety and the alkoxy moiety each has 1 to 4 carbon atoms; or an acyloxyalkyl group having the formula ##STR2## wherein R.sub.2 represents a hydrogen atom or a methyl group and R.sub.3 represents an alkyl group having 1 to 5 carbon atoms (such as a methyl, n-propyl, isobutyl, t-butyl, etc., group), an alkoxy group having 1 to 4 carbon atoms, a phenyl group, a phenyl group substituted with one or more of an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms or a halogen atom (such as a chlorine, bromine, iodine, etc., atom) or an aralkyl group wherein the alkyl moiety has 1 to 3 carbon atoms, which are useful as anti-hypertensive agents, a process for preparing 5-alkoxy-picolinic acids and the salts and the esters thereof, and anti-hypertensive compositions containing the 5-alkoxy-picolinic acids and the salts and the esters thereof.
摘要:
Novel compounds useful as hypotensive agents are presented having the general formula I ##STR1## wherein R.sub.1 represents a lower aliphatic acyl group, a straight or branched chain alkyl or alkenyl group or an aralkyl group of the general formula ##STR2## wherein R.sub.2 represents hydrogen, a lower alkyl group or a halogen atom. Furthermore, new therapeutic compositions of matter are also described incorporating the above novel 3-substituted-2(1H)pyridone-6-carboxylic acids (I) as an active ingredient with carriers and showing uses as hypotensive agents. These new compounds of the formula I are prepared either by reacting D-glucaro-.delta.-lactam or its salt with an acid anhydride or by reacting 3-hydroxy-2(1H)pyridone-6-carboxylic acid with an acyl anhydride or alkyl halide, aralkyl halide and an alkenyl halide.
摘要:
A 9-O-alkanoyl-3"-O-alkanoyloxymethyl-SF-837 substance is now synthetized, which is a new compound useful in that this new 9-O-alkanoyl-3"-O-alkanoyloxymethyl derivative of the SF-837 substance exhibits an antibacterial activity comparable to that of the parent SF-837 substance but is advantageously free from the unpleasant bitter taste inherent to the SF-837 substance and is hence adapted for oral administration. A process of producing the 9-O-alkanoyl-3"-O-alkanoyloxymethyl-SF-837 substance is also provided, which comprises hydrolysing partially and selectively a 9,2'-di-O-alkanoyl-3"-O-alkanoyloxymethyl-SF-837 substance in an aqueous alkanol or aqueous acetone. The 9,2'-di-O-alkanoyl-3"-O-alkanopyloxymethyl-SF-837 substance may be prepared by reacting a 9,2'-di-alkanoyl- or O-mono-O-alkanoyl-3"-O-thiomethoxymethyl-SF-837 substance with an alkanoic anhydride which is exemplified by acetic anhydride or propionic anhydride in the specification.
摘要:
Disclosed are compounds represented by formula (I) and pharmaceutically acceptable salts and solvates thereof. The compounds can inhibit the biosynthesis of triglycerides in the liver and can inhibit the secretion of lipoprotein containing apolipoprotein B from the liver. Therefore, they are useful for the prevention or treatment of hyperlipidemia (particularly hyper-very-low-density-lipoproteinemia) and arteriosclerotic diseases, such as cardiac infarction, or pancreatitis induced by hyperlipidemia. wherein A represents group —CR1R2—(CH2)i— where R1 and R2 each represent a hydrogen atom or alkyl, —CH═CH—, —O—CH2—, or —S(O)j—CH2—; B represents a hydrogen or halogen atom; X represents —CR3R4R5, —NR6R7, —(CH2—CH═C(CH3)—CH2)p—CH2CH═C(CH3)2, alkyl, cycloalkyl, phenyl, cinnamyl, or heteroaromatic ring; Y represents —(CH2)q—, —CH═CH—, —NR8—, an oxygen atom, or a bond; Z represents carbonyl or a bond; K represents alkylene or a bond; L represents —CH═CH— or a bond; and M represents a hydrogen atom, alkyl, cycloalkyl, phenyl, heterocyclic ring, biphenyl, or diphenylmethyl.
摘要:
New antibacterial 1-oxadethiacephalosporin derivatives of the general formula ##STR1## wherein R is a heterocyclic group or a group --S--Het where Het denotes a heterocyclic group, Y is a hydrogen atom or a methoxy group; x and y are each an integer of 1 to 3 is produced by a process comprising condensing a 1-oxacephem compound of the formula ##STR2## wherein R, Y, y are as defined above; R' is a hydrogen atom or a carboxyl-protecting group; and Z is a halo group, with a sulfur-containing amino acid of the formula ##STR3## wherein x is as defined above, in a solvent and removing, if necessary, the residual protective group from the resultant condensation product. The new 1-oxadethiacephalosporin derivatives and the pharmaceutically acceptable salts and esters thereof exhibit high and broad "in vitro" and "in vivo" antibacterial activity, particularly against .beta.-lactamase-producing strains of gram-negative bacteria.
摘要:
A new, efficient process is provided for the production of 7.beta.-[(2D-2-amino-2-carboxy)-ethylthio-acetamido]-7.alpha.-methoxy-3-[(1-methyl-1H-tetrazole-5-yl) thiomethyl]-3-cephem-4-carboxylic acid useful as new antibacterial agent. This process is economic in using as the starting material the inexpensive, corresponding cephem compound containing no 7.alpha.-methoxy group on the cephem nucleus and comprises 7.alpha.-methoxylation of a protected derivative of the starting cephem compound with t-butyl hypochlorite and lithium methoxide, followed by inactivation of the excessive methoxylation reagents with a trialkyl phosphite and acetic acid to prevent undesired side-reactions such as oxidation of the alkylthioacetyl group of the product, and further by conventional removal of the protecting groups.