摘要:
Catechol derivatives of the formula ##STR1## wherein Ra, Rb and Rc have the significance given herein, the ester and ether derivatives thereof which are hydrolyzable under physiological conditions and the pharmaceutically acceptable salts thereof are described and possess valuable pharmacological properties. In particular, they inhibit the enzyme catechol-O-methyltransferase (COMT), a soluble, magnesium-dependent enzyme which catalyses the transference of the methyl group of S-adensoylmethionine to a catechol substrate, whereby the corresponding methyl ethers are formed. Suitable substrates which can be O-methylated by COMT and which can thus be deactivated are, for example, extraneuornal catecholamines and exogeneously-administered therapeutically active substances having a catechol structure.Formula Ia above embraces not only compounds which form part of the invention, but also known compounds; the compounds which form part of the invention can be prepared according to known methods.
摘要:
Novel 2,2-disubstituted glycerol-like compounds are disclosed for use as anti-allergic and anti-inflammatory compounds. The compounds are antagonists of platelet activating factor ("PAF"). Also disclosed are methods of synthesizing and using the compounds of the invention as well as pharmaceutical compositions thereof. The compounds have the formula ##STR1## wherein R.sup.1, R.sup.2, R.sup.3, and R.sup.4 are as defined in the specification.
摘要:
The present invention relates to a compound having the formula: ##STR1## wherein R is a hydrogen atom, a carboxyl-protecting group or a negative charge and Q is a hydrogen atom, a halogen atom, a hydroxyl group, an acetoxy group, a carbamoyl group, an azide group, a substituted or unsubstituted quarternary ammonio group or a substituted or unsubstituted heterocyclic thio group having at least one hetero atom selected from the group consisting of a nitrogen atom, an oxygen atom and a sulfur atom, or a non-toxic salt or physiologically hydrolyzable non-toxic ester thereof; a process for producing it; and an antibacterial agent comprising it as an active ingredient.Further, the present invention also relates to a compound having the formula: ##STR2## wherein R.sup.3 is a hydrogen atom or an amino-protecting group, and each of R.sup.4 and R.sup.5 which may be the same or different is a hydrogen atom or a carboxyl-protecting group, or a salt thereof; and a process for producing it.
摘要:
Process for the production of known 2-oximinoacetamido-3-cephem-4-carboxylic derivatives comprising acylation of 7-amino-3-cephem-4-carboxylic acid derivatives with novel 2-oximinoacetic acid thio esters, as well as such thioesters and their production.
摘要:
Thiazolyl phenoxy derivatives are provided as well as pharmaceutical compositions containing such derivatives. The compositions are useful for lowering lipid activity in a subject and accordingly useful for reducing cholesterol and triglycerides.
摘要:
A compound of the formula: ##STR1## wherein A is the group of the formula:Ar.sup.1 --D--Ar.sup.2 --wherein Ar.sup.1 is a phenyl or thienyl group which may be optionally substituted with at least one of the same or different halogen atom; Ar.sup.2 is a phenylene or thienylene group which may be optionally substituted with at least one of the same or different halogen atom; D is a divalent radical selected from the group consisting of >C.dbd.N--OR.sup.4 [wherein R.sup.4 is a hydrogen atom or lower alkyl group], >C.dbd.O, ##STR2## >CHOH, >NH radical, or single bond, ##STR3## wherein R.sup.5 is a lower alkoxy or a phenyl group which may be optionally substituted with at least one of the same or different halogen atom; E is a methine group or a nitrogen atom; F is a vinylene group or an oxygen atom, ##STR4## wherein R.sup.6 is a lower alkoxy group; R.sup.7 is a lower alkyl group; R.sup.8 is a benzoyl group which may be optionally substituted with at least one of the same or different halogen atom, B is a divalent azole group; R.sup.1 is a hydrogen atom or a lower alkyl group; R.sup.2 is a hydrogen atom, lower alkyl, aryl-lower alkyl, or the group of the formula:R.sup.9 --G--wherein R.sup.9 is a hydrogen atom, lower alkyl, halo-lower alkyl, amino-lower alkyl, aryl or aryl-lower alkyl group or the group of the formula: ##STR5## wherein R.sup.10 is a hydrogen atom or lower alkoxy group; R.sup.11 is a hydrogen atom, lower alkyl, lower alkenyl, lower cycloalkyl, aryl-lower alkyl, aryl or aroyl group; or the group of the formula: --NR.sup.10 R.sup.11 is a 5-, 6- or 7-membered saturated heterocyclic ring; or the group of the formula:R.sup.12 --O--wherein R.sup.12 is a lower alkyl or polyhalo-lower alkyl group; G is a divalent group selected from the group consisting of >C.dbd.O, >C.dbd.S, >(C.dbd.O).sub.2 or >SO.sub.2 radical; or the group of the formula: --NR.sup.1 R.sup.2 is a 5-, 6- or 7-membered saturated heterocyclic ring: R.sup.3 is a hydrogen atom or lower alkyl group, or its acid addition salts, which is useful for immunomodulator.
摘要:
Broad spectrum antibiotics are provided which are compounds of the formula: ##STR1## wherein -W-R is a residue of a nucleophilic compound and R.sup.5 is hydroxyl or protected hydroxyl, or a pharmaceutically acceptable salt or 4-carboxy ester which is the alkoxymethyl, .alpha.-alkoxyethyl, .alpha.-alkoxy-.alpha.-substituted methyl, alkylthiomethyl, acyloxymethyl or .alpha.-acyloxy-.alpha.-substituted methyl ester thereof.
摘要:
Novel tricyclic triazolopyrimidine compounds represented by formula (I) shown in the specification and physiologically acceptable salts thereof are disclosed. These compounds have an excellent anti-allergic activity and are useful for treatment and prophylaxis of allergic diseases.
摘要:
There is described a process for the manufacture of a compound of the formula ##STR1## wherein R.sup.1 is lower alkyl, lower alkanoyl, lower alkenyl or the group --CH.sub.2 COOR.sup.2 or --C(CH.sub.3).sub.2 COOR.sup.2 and R.sup.2 is a readily cleavable group, by reacting a compound of the formula ##STR2## wherein R is lower alkyl, with an alkali metal allylate and reacting the resulting compound of the formula ##STR3## wherein M is an alkali metal atom, with a compound of the formula R.sup.1 -X, wherein X is a leaving group. This process can be used to manufacture antimicrobially active mono-.beta.-lactam, cephalosporin and penicillin derivatives.