摘要:
2-(3-phenoxy-phenyl)-propionic acid or its pharmaceutical treatments, are prepared by hydrolyzing and partially decarboxylating ##STR1## wherein R=C.sub.1 -C.sub.6 alkyl or amino, the latter compounds being themselves new and, where R=C.sub.1 -C.sub.6 alkyl, have antiinflammatory pharmaceutical properties.
摘要:
2-(3-Phenoxy-phenyl)-propionic acid or its pharmaceutical treatments, are prepared by hydrolyzing and partially decarboxylating ##STR1## wherein R=C.sub.1 -C.sub.6 alkyl or amino, the latter compounds being themselves new and, where R=C.sub.1 -C.sub.6 alkyl, have antiinflammatory pharmaceutical properties.
摘要:
3-Phenoxybenzene derivatives are prepared by a method which comprises the steps of(a) chlorinating benzaldehyde with chlorine gas in the presence of a hydrocarbon and a Lewis acid catalyst to obtain 3-chlorobenzaldehyde; (b) reacting the 3-chlorobenzaldehyde with ethylene glycol to obtain 2-(3-chlorophenyl)-1,3-dioxolane; (c) etherifying said dioxolane with an alkali phenolate to yield the intermediate 2-(3-phenoxyphenyl)-1,3-dioxolane and converting this intermediate to the corresponding aldehyde, cyanohydrin, sulfonic acid salt or oxime derivative.
摘要:
The invention relates to a process for the preparation of compounds of formula (I) ##STR1## wherein R.sup.1 stands for hydrogen or the group COR.sup.2, whereinR.sup.2 stands for a straight or branched chained alkyl having 1 to 8 carbon atoms optionally substituted with phenyl, naphthyl, tetrahydronaphthyl or m-phenoxy-benzyl, cycloalkyl having 3 to 6 carbon atoms optionally substituted with one or more straight or branched chained alkyl or alkenyl having 1 to 6 carbon atoms, phenyl or naphthyl.The compounds of formula (I) are prepared according to the invention by(a) reacting esters of formula (II) ##STR2## wherein X stands for chlorine or bromine andR.sup.2 has the same meanings as defined above with a phenol alkali metal salt and(b) if desired converting the diphenyl ethers so obtained to a specific compound of formula (I), m-phenoxybenzyl alcohol by the hydrolysis of the ester group.
摘要:
Arylacetic acid derivatives of the formula ##STR1## with R.sup.1, R.sup.2 and R.sup.3 specifically defined and which are useful as antirheumatic and antiinflammatory pharmaceuticals are prepared by catalytic hydrogenation of new compounds of the formula ##STR2## in which R and R.sup.10 are also specifically defined. The method of making the latter compound is also set forth.
摘要:
Arylacetic acid derivatives of the formula ##STR1## with R.sup.1, R.sup.2 and R.sup.3 specifically defined and which are useful as antirheumatic and antiinflammatory pharmaceuticals are practiced by catalytic hydrogenation of new compounds of the formula ##STR2## in which R and R.sup.10 are also specifically defined. The method of making the latter compound is also set forth.
摘要:
New compounds of the formula (VIIIa) are disclosed ##STR1## wherein R.sup.1 is hydrogen, methyl or ethyl;R.sup.2 is hydrogen, fluoro, or alkyl having 1 to 4 carbon atoms;R.sup.3 is hydrogen, phenyl, alkoxy having 1 to 6 carbon atoms; phenoxy, thenoyl, or benzoyl; orR.sup.2 and R.sup.3 together with the phenyl group to which they are attached form a naphthyl group which is unsubstituted or substituted by C.sub.1 to C.sub.4 alkyl or C.sub.1 to C.sub.4 alkoxy;R.sup.10 is phenylaminocarbonyl, 1-phenyl-5-tetrazolyl, a group --SO.sub.2 OMe, wherein Me is a metal atom selected from the group which consists of sodium or potassium, or a group --SO.sub.2 R.sup.6 in which R.sup.6 is alkyl having 1 to 4 carbon atoms, 4-methylphenyl, amino, C.sub.1 to C.sub.4 alkoxycarbonyl-amino, or benzoylamino, or R.sup.10 is a group ##STR2## in which R.sup.7 is cycloalkyl having 5 to 6 carbon atoms, and R is vinyl. The compounds are intermediates useful in the preparation of arylacetic acids having antiinflammatory compounds.
摘要:
A process for the preparation of anthelmintic compounds of the formula: ##STR1## wherein R.sup.1 is hydrogen or --COOR;R.sup.5 is C.sub.1 to C.sub.4 alkyl;R.sup.2 is halogen, alkyl, trifluoromethyl, alkoxy, aryloxy, or aralkoxy; andR.sup.4 is hydrogen, alkyl, cycloalkyl; alkenyl, alkynyl or aralkyl;or pharmaceutically acceptable salts thereof comprises subjecting a bis compound of the formula: ##STR2## to reduction to cleave the disulfide linkage and where R.sup.4 is other then hydrogen, subsequent reaction of the mercapto group. Intermediate compounds and a process for preparing same are also disclosed.
摘要:
A process is described for the preparation of 4-Methyl-5-(2-Chloroalkyl)-thiazole wherein the alkyl ranges from C.sub.2 -C.sub.5, by providing the steps of either a) converting the 3-thiocyanato-5-chloro-2-alkanone into 2-chloro-4-methyl-5-(2-chloroalkyl)-thiazole by gaseous hydrochloric acid in an organic solvent and hydrogenating the compound in the presence of a metal catalyst in an organic solvent, or b) reacting 3-thiocyanato-5-choro-2-alkanone with aqueous mineral acid and treating the thiazole obtained with a halogenating agent, and hydrogenating the 2-chloro-4-methyl-5-(2-chloroalkyl)-thiazole in an organic solvent in presence of a metal catalyst.
摘要:
The present invention relates to a process for the preparation of compounds of general formula (I), wherein R stands for a straight chained C.sub.1-5 alkyl group substituted by a chlorine atom in the 2-position, and acid addition salts thereof, characterized by reacting a 3,5-dichloro-2-alkanone of general formula (V), wherein R is a defined above, with an inorganic thiocyamate, and a) converting the 3-thiocyanato-5-chloro-2-alkanone of general formula (IV), thus obtained, wherein R is as defined above, into 2-chloro-4-methyl-5-(2-chloroalkyl)-thiazole of general formula (II), wherein R is as defined above, by gaseous hydrochloric acid in an organic solvent, hydrogenating the said compound in the presence of a metal catalyst in an organic solvent, or b) reacting said compound of general formula (IV) with an aqueous mineral acid and treating the 2-hydroxy-4-methyl-5-(2-chloroalkyl)-thiazole of general formula (III), thus obtained with a halogenating agent, and hydrogenating the 2-chloro-4-methyl-5-(2-chloroalkyl)-thiazole of general formula (II) thus obtained, wherein R is as defined above, in an organic solvent in presence of a metal catalyst, and optionally converting the 4-methyl-5-(2-chloroalkyl)-thiazole of general formula (I), wherein R is as defined above, thus obtained or a hydrochloride salt thereof, in a manner known per into another acid addition salt or setting free a compound of general formula (I), wherein R is a defined above, from its acid addition salt.