摘要:
New 3-[N-(mercaptoacyl)]amino-4-arylbutanoic acid derivatives are now provided, which exhibit analgesic activity and are effective to enhance the analgesia induced by a known analgesic compound, ]D-ala.sup.2,met.sup.5 ]-enkephalin (DAME).
摘要:
Thioalkanoyl-carnitines of general formula (I) ##STR1## wherein R is a straight alkylene radical having from 2 to 6 carbon atoms, or is a branched alkylene radical having from 3-6 carbon atoms, or is a branched alkylene radical having from 3-6 carbon atoms,R.sub.1 is a straight or branched lower alkyl radical having from 1 to 4 carbon atoms, andX.sup.- is a halogen anionare prepared by reacting a thio-acid (II) of general formula R.sub.1 COSH(a) if in (I) the thioalkanoyl radical R.sub.1 COS-- is in terminal position, with a compound of general formula (III) ##STR2## wherein n is an integer comprised between 0 and 4 or(b) if in (I) the thioalkanoyl radical R.sub.1 COS-- is not in terminal position, with a compound of general formula (IV) ##STR3## wherein m and m.sup.1 are integers comprised between 0 and 3, andR.sub.2 is a lower alkyl radical having from 1 to 4 carbon atoms.The pharmaceutical compositions containing the thioalkanoyl-carnitines (I) possess mucolytic and antitussive activity.
摘要:
Methods and intermediates are disclosed for the preparation of trifluoromethylthioacetic acid using the reaction of trifluoromethylsulfenyl halides with certain orthoesters.
摘要:
A new class of anti-spasmodic compounds having three branch chains is provided. These compounds have the general formula: ##STR1## where R.sub.1, R.sub.2 and R.sub.3 are saturated straight chain or branched alkyl groups contained from 1 to 8 carbon atoms, and are separated or linked to one another to form an aliphatic ring system. k is an integer from 0 to 5, and the total number of carbon atoms in R.sub.1 plus R.sub.2 plus R.sub.3 plus k are equal to or less than 12. Furthermore, l is an integer from 1 to 3, m is an integer from 1 to 3, n is an integer from 1 to 3, and X may be nonexistent or may be O, S, NH or CH.sub.2 or salts thereof. However, when X is nonexistent the terminal group in both the m chain and the n chain is a methyl group.
摘要:
Novel fluorinated thiocarbonic acid ester-fluorides of the formula ##STR1## in which R.sup.1 represents alkyl, cycloalkyl or optionally substituted aryl andR.sup.2 and R.sup.3 independently of one another represent hydrogen or alkyl, orR.sup.1 and R.sup.2 together represent an alkylene chain,a new process for the preparation of the new compounds and their use as intermediates for the preparation of compounds having herbicidal properties.Novel intermediates of the formulae ##STR2## in which R.sup.2 and R.sup.3 have the above-mentioned meaning,R.sup.4 is optionally substituted aryl,R.sup.5 is alkyl or cycloalkyl, andX is fluorine or chlorine, at least one X representing chlorine.
摘要:
Compounds of the structure: ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, and R.sub.6 are independently hydrogen, alkyl, alkenyl, alkynyl, phenyl-alkyl, or cycloalkyl,n is an integer from 0 to 4 inclusive,M is alkenyl, alkynyl, cycloalkyl, cycloalkyl-alkyl, polycycloalkyl, polycyclo-alkyl-alkyl, aryl, aryalkyl, heteroaryl, heteroaryl-alkyl, hetero-cycloalkyl, hetero-cycloalkyl-alkyl, alkoxyalkyl, alkylthioalkyl, alkylamino-alkyl, dialkylaminoalkyl, fused aryl-cycloalkyl, fused aryl-cycloalkyl-alkyl, fused hetero-aryl-cycloalkyl, or fused heteroaryl-cycloalkyl-alkyl,Y is hydroxy, alkoxy, amino, or substituted amino, amino-alkanoyl, aryloxy, aminoalkoxy, or hydroxyalkoxy, andR.sub.7 is a group of the formula ##STR2## wherein X is a branched alkane or cycloalkyl; and where Y is hydroxy their non-toxic, pharmaceutically acceptable alkali metal, alkaline earth metal, and amine salts.The compounds of this invention and their salts possess antihypertensive and angiotensin converting enzyme inhibitory activity.
摘要:
Zinc compounds of formula IICF.sub.3 CCl.sub.2 ZnCl.yL (II)wherein y is 1 or 2 and L is a solvent ligand selected from the group of the N-disubstituted acid amides, N-substituted lactams and the organic sulfoxides, are suitable for reaction with CO.sub.2, COS or SO.sub.2 to give, after working up, the acids of formula ICF.sub.3 CCl.sub.2 --X (I)wherein X is --CO.sub.2 H, --CSOH or --SO.sub.2 H, in good yield.
摘要:
Disclosed is a mild, efficient, stereo-selective process for a one step conversion of primary and secondary alcohols to their corresponding thiol ester and thiol derivatives with inversion of configuration. The process comprises the reaction of the alcohol in question (4), the thiolacid of choice (5) in the presence of adduct 3; the resulting thiol ester 6 may be converted to the free thiol 7 by hydrolysis or reductive methods: ##STR1##
摘要:
This invention relates to a process for the optical resolution of DL-.alpha.-methyl-.beta.-acylthiopropionic acids of the formula [I], ##STR1## wherein R is a lower alkyl group having 1-4 carbon atoms, phenyl or substituted phenyl bearing methyl or chloro radical; a method for the racemization of an optically active .alpha.-methyl-.beta.-acylthiopropionic acid of the formula [Ia], ##STR2## wherein R is as defined above; and a process for the synthesis of captopril of the formula [II], ##STR3## using the D-acid [Ia] as an intermediate. The optically active .alpha.-methyl-.beta.-acylthiopropionic acids are useful as intermediates for the production of medicines, for example, captopril or its congeners.
摘要:
Thioesters of the formula RCOSR are produced from a mercaptan of the formula RSH wherein R is a benzylic, aromatic or aliphatic moiety by reacting the mercaptan with carbon monoxide in the presence of a polyunsaturated olefinic hydrocarbon and as catalyst a metal component selected from iron, cobalt, nickel, molybdenum, ruthenium, rhodium and iridium, the metal component being in free or combined form.