摘要:
The invention relates to processes for preparing a compound of formula (X) and the enantiomer of said compound, wherein the benzoic acid moiety is attached at position 6 or 7 of the chroman ring, and R?1, R2, and R3¿ are as defined herein. The invention further relates to intermediates that are useful in the preparation of the compound of formula (X).
摘要:
There are disclosed compounds of formulae (I) or (II) in which A is selected from the group consisting of (1), (2), (3) and (4); OH, and one of R1 and R2 is selected from H, OH and OCH3, and the other of R1 and R2 is selected from OH and OCH3; one of R3 and R4 is selected from H, OH and OCH3, and the other of R3 and R4 is selected from OH and OCH3; provided that at least one of the pairs R1, R2 and R3, R4 are both OH; R5 is selected from OH and OCH3; and ----- denotes a single or double bond; and pharmaceutically acceptable salts and prodrugs thereof. The compounds of the invention are useful for the treatment of hormone-dependent conditions and cancers.
摘要:
This invention relates to new chemical compounds which possess valuable therapeutic activity particularly as lipoxygenase inhibitors possessing antiflammatory and antiallergic properties. The present new compounds are of the formula
wherein, Z and Z, each are alkylene chains containing up to three carbon atoms in the principal chain and a total of up to five carbon atoms and include from 0-1 double bonds; R is H or lower alkyl; R, and R, each are H, lower alkyl, OH, lower alkoxy, benzyloxy, carboxy, alkylenecarboxy or alkylcarbonyl. R, IS H, lower alkyl, aralkyl or lower alkanoyl; and X IS -O(CH 2 ) n -, -CH =CH-, - (CH 2 ) n -, -S(CH 2 ) n - or
摘要:
A method is provided for preparing alkenylthiophenols, e.g. para-vinylthiophenol, or their esters, e.g., para-vinylthiophenol acetate by reacting a hydroxy aromatic ketone, e.g., 4-hydroxyacetophenone (4-HAP) with an N,N-di(organo)thiocarbamoyl halide, e.g., N,N-dimethylthiocarbamoyl chloride (DMTC) to form an O-(acylaryl) N,N-di(organo)thiocarbamate, e.g., O-(4ʹ-acetophenyl) N,N-dimethylthiocarbamate, and pyrolytically rearranging the latter compound to form an S-(acylaryl) N,N-di(organo)thiocarbamate, e.g., S-(4ʹ-acetophenyl) N,N-dimethylthiocarbamate. In one procedure, the latter compound is directly reduced to form an S-(1-hydroxyalkylaryl) N,N-di(organo) thiocarbamate, e.g., S-[4ʹ-(1-hydroxyethyl)phenyl] N,N-dimethylthiocarbamate, which is either hydrolyzed to form a (1-hydroxyalkyl) thiophenol, e.g., 4ʹ-(1-hydroxyethyl) thiophenol, which, optionally after acylation of its thiol group, is dehydrated to form the alkenylthiophenol wherein the double bond is at the ring-bonded carbon atom, e.g., para-vinylthiophenol, or the S-(1-hydroxyalkylaryl) N,N-di(organo) thiocarbamate is dehydrated to form an S-(alkenylaryl) N,N-di(organo) thiocarbamate, e.g., S-(4-vinylphenyl) N,N-dimethylthiocarbamate which is hydrolyzed to form the alkenylthiophenol. In an alternative procedure, the S-(acylaryl) N,N-di(organo)thiocarbamate is hydrolyzed and the resulting thiol acylated with an acylating agent, e.g., acetyl chloride, to produce an acylthiophenol ester, e.g., 4-acetothiophenol acetate, which is then reduced and hydrolyzed to produce the (1-hydroxyalkyl) thiophenol. The latter compound is then dehydrated to produce the alkenylthiophenol, or acylated and dehydrated to produce the alkenylthiophenol thioester, as described in the first procedure.
摘要:
A catechol derivative represented by the formula wherein R' represents a hydrogen atom or a C, to C 5 alkyl group; R 2 represents a hydrogen atom or a halogen atom; X represents a straight chain or branched alkylene group having 1 to 15 carbon atoms or a vinylene group; Y represents a carbonyl group or a group represented by represents a hydrogen atom or a C, to C. alkyl group) and Z represents a hydrogen atom, a straight chain or branched alkyl group having 1 to 15 carbon atoms ora cycloalkyl group; the sum of the carbon atoms of said X and Z being at least 3. The compounds of this invention are useful for the prophylaxis and treatment for various allergic diseases, ischemic heart diseases an inflammations caused by slow reacting substance of anaphylaxis (SRS-A), since the compounds inhibit very potently the formation and release of SRS-A.
摘要:
1. A process for the preparation of 1-4-hydroxy-phenyl)-butan-3-one (I), wherein A. a corresponding 4-tert.-alkoxy-benzaldehyde of the general formula II see diagramm : EP0038480,P5,F2 where R is H or CH3 , is condensed with acetone under alkaline conditions to give the novel 1-(4-tert.-alkoxy-phenyl)-but-1-en-3-one of the general formula IIIa see diagramm : EP0038480,P5,F4 B. the latter is hydrogenated, during of after this condensation, to give the novel 1-(4-tert.-alkoxyphenyl)-butan-3-one of the formula IIIb see diagramm : EP0038480,P5,F6 and C. isobutene or 2-methyl-but-1(2)-ene is eliminated therefrom, at from 40 to 150 degrees C, in the presence of a catalytic amount of an acid.
摘要:
The compounds of the formula (II): wherein one of A is a CHOH group and B is a CHOH or CO group have been found to be effective anti-inflammatory agents. Their preparation and use is described.