Abstract: Compounds of the formula I ##STR1## in which n represents 1, 2 or 3, Ar represents a carbocyclic or heterocyclic aryl radical, Ac represents the acyl radical of an acid, Z represents a radical --OR.sub.7 or --NR.sub.8 R.sub.9, R.sub.1 represents hydrogen, unsubstituted or substituted lower alkyl, a carbocyclic or heterocyclic aryl radical or free, etherified or esterified hydroxy, R.sub.2 and R.sub.3, independently of one another, each represents hydrogen, unsubstituted or substituted lower alkyl, formyl or functionally modified formyl, carboxy or functionally modified carboxy, a carbocyclic or heterocyclic aryl radical or unsubstituted or mono- or di-substituted amino, R.sub.4 represents hydrogen or lower alkyl, R.sub.5 and R.sub.6, independently of one another, each represents hydrogen, unsubstituted or substituted lower alkyl or a carbocyclic or heterocyclic aryl radical, R.sub.7, R.sub.8 and R.sub.

Abstract: Cyclic octapeptides of the formula ##STR1## in which Aaa represents a radical of a straight-chained .alpha.,.omega.-diaminoalkanoic acid having from 4 to 7 carbon atoms,trp represents a radical L-Trp or, especially, D-Trp, or a radical derived therefrom, which carries a halogen atom in the indole nucleus,Ac.sub.A represents an acyl radical Ac of an optionally substituted carboxylic acid which is positioned at the .omega.-amino group, or represents an amidino group or hydrogen, andAc.sub.B represents an acyl radical Ac.sup.1 of an amino acid or of an oligopeptide which is positioned at the .epsilon.-amino group, or, preferably, represents hydrogen,as well as physiologically tolerable salts and therapeutically acceptable complexes thereof can be used as antidiabetics and for the treatment of gastro-intestinal bleeding in an analogous manner to somatostatin. They can be obtained by conventional processes of peptide chemistry, especially by the cyclization of corresponding linear peptides.

Abstract: The present invention relates to new lipopeptides and in particular to compounds of either of the formulae ##STR1## wherein R.sub.1 and R.sub.2 each represent a saturated or unsaturated aliphatic or mixed aliphatic-cycloaliphatic hydrocarbon radical which has 11-21 C atoms and which is also optionally substituted by oxygen functions, R.sub.3 represents hydrogen or the radical R.sub.1 --CO--O--CH.sub.2 --, where R.sub.1 has the same meaning, R.sub.1 ' is a saturated or unsaturated aliphatic hydrocarbon radical of at least 9 C atoms, which is optionally substituted at one of the C atoms non adjacent to the sulfur atom by a free hydroxyl group or a hydroxyl group esterified with a monobasic carboxylic acid and which is optionally interrupted in the C atoms chain by one or more oxygen atoms, and which hydrocarbon is optionally substituted by a maximum of 2 cycloaliphatic hydrocarbon radicals having 5-8 ring C atoms, or R.sub.1 ' is the radical --CO--R.sub.1 ", wherein R.sub.

Abstract: Acylpeptides derived from somatostatin or from a derivative thereof having analogous action, in which the amino acids sequence is modified by omitting individual amino acids and/or by exchanging them for other amino acids, and in which the .epsilon.-amino group of the lysine residue in the 9-position, and optionally also the .epsilon.-amino group of the lysine residue in the 4-position and/or the N-terminal .alpha.-amino group carries the acyl radical of an optionally substituted alkanecarboxylic acid, and salts and complexes thereof can be used as antidiabetics and/or for combating gastrointestinal bleeding. They are manufactured by conventional methods of peptide chemistry.

Abstract: Cyclic peptides of the formula ##STR1## in which trp represents L-Trp, D-Trp, or an analogous radical which carries a halogen atom in the indole nucleus, Ac.sub.A represents hydrogen, or an acyl radical Ac of a carboxylic acid present at the .epsilon.-amino group, A represents L-Phe, D-Phe, L-Phg or D-Phg, or a corresponding radical having a substituted or saturated phenyl ring, and B represents the residue of a .gamma.- or .delta.-amino-lower alkanecarboxylic acid which may carry an optionally substituted cyclic hydrocarbyl radical Ar, and also pharmacologically tolerable salts and therapeutically acceptable complexes thereof can be used as an antidiabetic in an analogous manner to somatostatin. They can be obtained by conventional processes of peptide chemistry, especially by cyclisation of corresponding linear peptides.

Abstract: The somatostatin-analogous cyclic octapeptides according to the invention of the general formula ##STR1## in which trp represents L-Trp or D-Trp, in which the benzene ring may be substituted by a halogen atom, andGaba(Ar) represents the residue of a .gamma.-aminobutyric acid substituted by a cyclic hydrocarbyl radical,and their acid addition salts and complexes are distinguished by a strong inhibition of the insulin and glucagon secretion of the pancreas and are therefore therapeutically acceptable, preferably in the form of pharmaceutical preparations, in similar indications to those of somatostatin, especially as anti-diabetics. The compounds are manufactured by conventional processes of peptide synthesis, especially by liberation from corresponding protected intermediates after intramolecular cyclization of a corresponding linear octapeptide.

Abstract: The somatostatin-analogous peptides according to the invention of the general formula ##STR1## in which Bmp represents the desaminocysteine radicalX represents Asn or His,trp represents D-Trp that may be substituted in the benzene ring by a halogen atom, andY represents the radical of a secondary .alpha.-amino acid having a maximum of 8 carbon atomsand the corresponding peptide amides and also acid addition salts and complexes thereof are distinguished by strong insulin-antagonistic and glucagon-antagonistic effects and are therefore therapeutically acceptable, preferably in the form of pharmaceutical preparations, in similar indications to those of somatostatin, especially also as antidiabetics. The compounds are manufactured by conventional processes of peptide synthesis, especially by liberation from corresponding protected intermediates and by the formation of the cystine disulphide bridge by means of oxidation.

Abstract: The invention concerns an improved process for the manufacture of cystine-containing peptides from cysteine-containing aminoacid sequences whose mercapto groups are protected by trityl groups, wherein the S-trityl cysteine-containing sequences are directly oxidized with iodine to yield the cystine disulfide bond.

Abstract: Sulphur-free cyclopeptides with somatostatin-analogous aminoacid partial sequences, of the formula ##STR1## in which R is Asn, Ala or de-R, trp is D-Trp or L-Trp, which can be substituted in the benzene ring by halogen atoms or nitro groups, W is a free or etherified hydroxyl group or halogen atom present as a substituent on the benzene ring of the L-phenylalanine radical, or is hydrogen, X is the radical of an .omega.-amino-lower alkane-(mono or di)-carboxylic acid or de-X and Y is the radical of an .omega.-amino-lower alkane-(mono or di)-carboxylic acid or de-Y, and also acid addition salts and complexes thereof have biological properties similar to those of somatostatin and can be used, especially in the form of pharmaceutical preparations, for the treatment of excessive secretion of somatotropin, insulin and/or glucagon. The compounds according to the invention are obtained by cyclising a corresponding linear peptide compound in which the .epsilon.

Abstract: The new hypocalcaemically active peptides of formula I ##STR1## and corresponding compounds in which one or more of the asparagine and glutamic acid radicals are replaced by the aspartic acid or glutamic acid radical and/or the aspartic acid radical is replaced by the asparagine radical, their dimers, especially those in which 2 identical peptide sequences (1-32 and 1'-32') are joined in an anti-parallel arrangement via the cysteine radicals 1,7' and 7,1' by means of a disulfide bond, and derivatives are useful as hypocalcaemic agents and are prepared by splitting off groups protecting at least one amino or one carboxyl group or oxidizing the corresponding sulfides to the disulfides or condensing together adequate peptides.

Abstract: Process for the manufacture of peptides which contain more than one disulphide bond characterized in that in one or two aminoacid sequences containing cysteine, in which disulphide bonds are to be produced, two cysteine radicals which are to be linked are protected by a mercapto-protective group R.sub.1 of the aralkyl type, two further cysteine radicals are protected by an acylaminomethyl group R.sub.2, the protective groups R.sub.1 are removed by treatment with iodine in the presence of a polyhalogenated lower aliphatic hydroxy compound or oxo compound, or a corresponding lower alkanoic acid lower alkyl ester, at the same time forming the disulphide bond between these cysteine radicals, which are protected by R.sub.1, and at any desired point after removal of the polyhalogenated compound the second disulphide bridge is formed in the usual manner.

Abstract: Synthetic hypocalcaemic dotriacontapeptide of the formulaH-Cys-Ser-Asn-Leu-Ser--Thr-Cys-Val-Leu-Ser-Ala-Tyr-Try-Arg-Asn-Leu-Asn-Asn- Phe-His-Arg-Phe-Ser-Gly-Met-Gly-Phe-Gly-Pro-Glu-Thr-Pro-OH Iand analogues and derivatives, salts and complexes thereof and process for their manufacture.

Abstract: The new hypocalcaemically active peptides of formula Ih-cys-Gly-Asn-Leu-Ser-Thr-Cys-Met-Leu-Gly-Thr-Tyr-Thr-Gln-Asp-Phe-Asn-Lys-P he-His-Thr-Phe-Pro-Gln-Thr-Ala-Ile-Gly-val-Gly-Ala-Pro-OHand corresponding compounds in which one or more of the asparagine and glutamic acid radicals are replaced by the aspartic acid or glutamic acid radical and/or the aspartic acid radical is replaced by the asparagine radical, their dimers, especially those in which 2 identical peptide sequences (1-32 and 1'-32') are joined in an anti-parallel arrangement via the cysteine radicals 1,7' and 7,1' by means of a disulfide bond, and derivatives are useful as hypocalcaemic agents and are prepared by splitting off groups protecting at least one amino or one carboxyl group or oxidizing the corresponding sulfides to the disulfides or condensing together adequate peptides.