Abstract: Novel 2,3,4-benzothiadiazepines-2,2-dioxides and processes for the preparation thereof are disclosed. The compounds influence the central nervous system and may be used to treat or prevent Alzheimer's disease, Parkinson's disease or Huntington's disease, senile dementia not of the Alzheimer's type, vascular dementia, post-stroke dementia, Korsakoff's syndrome, Down's syndrome, schizophrenia, panic disorder, post-traumatic stress disorder, anxiety or depression.

Abstract: The invention relates to new 2-(substituted imino)-thiazolidines, a process for the preparation thereof, pharmaceutical compositions comprising the same, the use of the said 2-(substituted imino)thiazolidines for the treatment of diseases and for the preparation of pharmaceutical compositions suitable for the treatment of diseases.The new 2-(substituted imino)-thiazolidine derivatives provided by the present invention correspond to the general formula (I), ##STR1## wherein R.sup.1 and R.sup.2 each represent halogen, nitro, C.sub.1-4 alkoxy or C.sub.1-4 alkyl, which latter may optionally carry one or more halogen substituent(s),R.sup.3 and R.sup.4 each represent hydrogen or C.sub.1-4 alkyl,Z denotes oxygen, sulfur or imino, which latter is substituted by a C.sub.1-6 alkyl or a C.sub.1-6 alkenyl group,R.sup.5 stands for hydrogen, C.sub.1-4 alkyl, C.sub.1-4 alkylthio or a group or the formula --NH--R, wherein R represents C.sub.1-6 alkyl, aryl, aralkyl or C.sub.

Abstract: The invention relates to novel iminothiazolidine derivatives of the formula (I), ##STR1## wherein R.sup.1 and R.sup.3 represent, independently from each other, hydrogen or lower alkyl group,R.sup.3 is nitro or amino group,R stands for halo, lower alkyl, haloalkyl, nitro, amino, hydroxy, lower alkoxy, carboxy or lower alkoxycarbonyl group, andn is 0, 1 or 2,and pharmaceutically acceptable acid addition salts thereof.The iminothiazolidine derivatives of the formula (I) possess valuable antidepressant, antiparkinsonic, antiepileptic and spasmolytic activities.

Abstract: The invention relates to compounds of the general formula (X) ##STR1## wherein R is as a removable protecting substituent of the amido group a phenyl group or a benzyl group substituted by one or more alkoxy group(s) having 1-4 carbon atoms andR.sup.1 stands for a hydrogen atom or an alkyl group having 1-4 carbon atoms and a process for the preparation thereof.The compounds of the general formula (X) can be prepared from the starting materials of the general formula (V), wherein R and R.sup.1 are as stated above and Z is an alkyl group having 1-4 carbon atoms.The compounds of the general formula (X) are useful pharmaceutical intermediates which can be used in the preparation of known antibiotics (e.g. Thienamycin and PS-5).

Abstract: The invention relates to a process for the preparation of the compound of the formula I, ##STR1## which comprises (a.sub.1) splitting off the ethylene ketal protecting group from the azetidinone derivative of the formula IVa, ##STR2## reducing the compound of the formula III thus obtained, ##STR3## treating the resulting compound of the formula II ##STR4## with concentrated aqueous hydrogen chloride solution; or (a.sub.2) reducing the compound of the formula III, treating the compound of the formula II thus obtained with concentrated aqueous hydrogen chloride solution; or (a.sub.3) treating the compound of the formula II with concentrated aqueous hydrogen chloride solution; and isolating the compound of the formula I thus obtained from the reaction mixture. The compound of the formula I is useful as an intermediate in the production of thienamycin, a highly potent antibiotic.

Abstract: The invention relates to new heterocyclic compounds containing a protected C-acetyl group. More particularly, the invention concerns new compounds of the Formula (V) ##STR1## wherein R is a group suitable for the protection of amides;Z is alkyl; andY.sup.1 and Y.sup.2 together form a group suitable for temporary protection of a keto group. The new compounds are valuable intermediates in the synthesis of thienamycin.

Abstract: The invention relates to new heterocyclic compound containing an alkoxycarbonyl and a substituted methyl group a process for the preparation of these and analogeous compound and pharmaceutical compositions containing them.More particularly, the invention concerns compounds of the general formula (IVa) ##STR1## wherein R' is hydrogen, 2-ethoxycarbonylethyl, aryl or a group suitable for a temporary protection of amides andY' represents a group of the formula --COOZ or --CH.sub.2 M, in whichZ is lower alkyl andM is hydroxyl, halogen, cyano or a group of the formula --O--SO.sub.2 R.sup.2, in whichR.sup.2 is lower alkyl or aryl,with the proviso that if R' is phenyl, Y' cannot stand for the group --COOC.sub.2 H.sub.5.The invention further relates to a process for the preparation of compounds of the general formula (IV) ##STR2## in which R and Y are identical with R' and Y', respectively, except the proviso.

Abstract: The invention relates to new heterocyclic compounds containing a protected C-acetyl group. More particulary, the invention concerns new compounds of the formula (VI) ##STR1## wherein R.sup.1 is hydrogen or a group suitable for a temporary protection or amides,X is hydroxyl, halogen, cyano or an --O--SO.sub.2 --R.sup.2 group, in whichR.sup.2 is lower alkyl or aryl,Y.sup.1 and Y.sup.2 together form a group suitable for a temporary protection of a keto group.The new compounds possess anaphylactic properties and are valuable intermediates of thienamycin synthesis. Their preparation and the new intermediates obtained during their preparation are also within the scope of the invention.

Abstract: The invention relates to new heterocyclic compounds containing a C-acetyl group and a process for their preparation. More particularly, the invention concerns new compounds of the formula (III). ##STR1## in which R is a protecting group suitable for temporary protection of amines and amides or an aryl group, and Z is alkyl.The compounds are intermediates in the preparation of penicillins.