摘要:
The present invention provides medicinal compounds that are characterized by a cyclic moiety (A) linked through a carboxamido group (more specifically, a carbamate group or a urea group) to another cyclic moiety (B) which is in turn linked to another, N-substituted carboxamido group. These compounds can be used an anti-inflammatory and immunosuppressive agents, as demonstrated by their inhibition of the production of IL-1.beta. in vitro and TNF.alpha. in vivo.
摘要:
The compounds of formula ##STR1## wherein R, R.sub.1, R.sub.2, R.sub.3, and R.sub.4 have the meanings given in the specification, are described.The compounds of formula I are active as inhibitors of the enzyme HMG-CoA reductase and can be used in therapy as anti-hypercholesterolemics.
摘要:
The present invention refers to a new process for the synthesis of tapentadol comprising the quantitative resolution of the racemic mixture (V) to obtain the stereoisomer of (S)-3-(dimethylamino)-2-methyl-1-(3-nitrophenyl)-propan-1-one (VII) according to the Scheme 2 below using the (2R,3R)—O,O′-dibenzoyltartaric chiral acid wherein said resolution is quantitative. The present invention also refers to some intermediate compounds of the new synthesis process of tapentadol.
摘要:
The object of the present invention is a new process for the synthesis of tapentadol, both as free base and in hydrochloride form, which comprises the step of alkylation of the ketone (VII) to yield the compound (VIII), as reported in Diagram 1, with high stereoselectivity due to the presence of the benzyl group as substituent of the amino group. It was surprisingly found that this substitution shifts the keto-enol equilibrium towards the desired enantiomer and amplifies the capacity of the stereocenter present in the compound (VII) to orient the nucleophilic addition of the organometallic compound at the carbonyl towards the desired stereoisomer. This substitution thus allows obtaining a considerable increase of the yields in this step, and consequently allows significantly increasing the overall yield of the entire tapentadol synthesis process.A further object of the present invention is constituted by the tapentadol free base in solid form, obtainable by means of the process of the invention.Still another object of the invention is represented by the crystalline forms I and II of the tapentadol free base.A further object of the present invention is the mixture of the crystalline forms I and II of the tapentadol free base.
摘要:
A novel process for the synthesis of Lacosamide using D,L-serine as starting material is described, where the methylation reaction of hydroxyl is carried out using an inexpensive base such as NaOH and an inexpensive alkylating agent, non-toxic and non-carcinogenic, such as methyl p-toluenesulfonate; the R enantiomer is isolated from the racemic mixture of Lacosamide after selective hydrolysis of the acetamide, salification of the racemic mixture with a chiral acid (HX*) in an organic solvent, resolution of the diastereoisomeric mixture, preferably by precipitation of the R enantiomer, and subsequent acetylation of the optically pure intermediate.
摘要:
Compounds of formula I ##STR1## wherein R represents hydrogen, C.sub.1 -C.sub.6 alkyl, C.sub.5 -C.sub.7 cycloalkyl, methylene-dioxy or phenyl, which may be substituted by one or two groups independently selected from hydroxy, halogen, nitro, C.sub.1 -C.sub.6 alkyl or C.sub.1 -C.sub.6 alkoxy; R.sub.1 and R.sub.2 independently represent hydrogen, COOR.sub.3, --CONR.sub.4 R.sub.5, ##STR2## --OCONR.sub.4 R.sub.5, --OCOR.sub.3, --NR.sub.4 R.sub.5, --OCOOR.sub.6, --NR.sub.3 COR.sub.7, --NR.sub.CONR.sub.4 R.sub.5, --N.dbd.CH--NR.sub.4 R.sub.5, NO.sub.2, CN, OH, SR.sub.3, wherein R.sub.3 is hydrogen or C.sub.1 -C.sub.6 alkyl, R.sub.4 and R.sub.5 independently are hydrogen or C.sub.1 -C.sub.6 alkyl, R.sub.6 is C.sub.1 -C.sub.6 alkyl, and R.sub.7 is hydrogen, C.sub.1 -C.sub.6 alkyl or C.sub.1 -C.sub.6 alkoxy, with the proviso that R.sub.1 and R.sub.2 cannot be hydrogen at the same time; X is oxygen or sulphur; Y represents a C.sub.2 -C.sub.6 alkylene chain or a C.sub.5 -C.sub.7 cycloalkylene group; and their pharmaceutically acceptable salts are provided and their use in pharmaceutical compositions which may be used in the treatment of cardiovascular diseases.
摘要:
Cardioactive steroidal compounds of the formula I ##STR1## wherein R, R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6 and R.sub.7 have the meanings shown in the description, and pharmaceutical compositions containing them.
摘要:
The present invention relates to an enantioselective enzymatic process for the preparation of an optically active 3-hydroxypiperidinecarboxylic acid derivative.
摘要:
A process for preparing fexofenadine is described, which provides for the hydrolysis of 4-[4-[4-(hydroxydiphenylmethyl)-1-piperidyl]-1-oxobutyl]-α,α-dimethylbenzeneacetic acid-alkyl ester, in a mixture of water and optionally an organic solvent, in the presence of a base; the carboxylate salt of 4-[4-[4-(hydroxydiphenylmethyl)-1-piperidyl]-1-oxobutyl]-α,α-dimethylbenzeneacetic acid is thus obtained, which is then directly reduced as carboxylate in a basic environment with hydrogen in the presence of a suitable hydrogenation catalyst to give the carboxylate of fexofenadine, which is precipitated by neutralization of the solution.