摘要:
Compounds of the formula 1 or 1a ##STR1##HSCH.sub.2 CH(R)CO--Lys--Asn--Phe--Phe--Trp--Lys--Thr--Phe--Thr--Ser--NHCH.sub.2 CH.sub.2 SH (1a)In which R is hydrogen or NHR.sup.1 in which R.sup.1 is lower aliphatic acyl containing from 1 - 6 carbon atoms or benzoyl, and pharmaceutically acceptable salts thereof are disclosed. The compounds of formulae 1 and 1a are useful for the management of diabetes and the treatment of acromegaly in mammals. Methods for their use also are disclosed.
摘要:
Compounds of the formula 1 or 1a ##STR1## wherein R.sup.1 is H--, H--Gly or H--Leu and R.sup.2 is H or COOH and pharmaceutically acceptable salts thereof, are disclosed. The compounds of formulae 1 and 1a are useful for the management of diabetes and the treatment of acromegaly. Methods for their use are also disclosed.
摘要:
A new process for preparing the cyclic dodecapeptide triglycyl-lysine vasopressin of the formula ##STR1## which comprises the preparation of a first hexapeptide of formula Boc--Gly--Gly--Gly--Cys(Trt)--Tyr--Phe--NHNH.sub.2 and a second hexapeptide of formula H--Gln(Mbh)--Asn(Mbh)--Cys(Trt)--Pro--Lys(Boc)--Gly--NH.sub.2 by a series of condensations involving the reaction of an appropriately protected peptide unit having an activated carboxyl with an appropriately protected peptide having a free amino group. Subsequently, the first and second hexapeptides are condensed according to the azide coupling method to obtain the linear protected dodecapeptide of formula Boc--Gly--Gly--Gly--Cys(Trt)--Tyr--Phe--Gln(Mbh)--Asn(Mbh)--Cys(Trt)--Pro--Lys(Boc)--Gly--NH.sub.2 ; thereafter the linear protected dodecapeptide is transformed into the desired cyclic dodecapeptide, triglycyllysine vasopressin, by oxidizing and deprotecting processes.
摘要:
A process for preparing the LH- and FSH-releasing hormone of the formula Ih-- pyr-- His-- Trp-- Ser-- Tyr-- Gly-- Leu-- Arg-- Pro-- Gly-- NH.sub.2which comprises the following steps: Condensing N-(5-oxo-L-prolyl)-L-histidine hydrazide by means of the azide method with L-tryptophan benzyl ester and treating the resulting compound with hydrazine hydrate to obtain N-[N-(5-oxo-L-prolyl)-L-histidyl]-L-tryptophan hydrazide (II); treating N-[O-benzyl-N-carboxy-L-tyrosyl]glycine N-benzyl ester with ethyl chloroformate to obtain the corresponding mixed anhydride which is reacted with t-butyl carbazate to obtain the corresponding 2-carboxyhydrazide t-butyl ester which is hydrogenolyzed to N-L-tyrosylglycine 2-carboxyhydrazide t-butyl ester, and condensing the latter with N-carboxy-L-seryl N-benzyl ester 2,4-dinitrophenyl ester followed by hydrogenolysis of the reaction product to obtain N-(N-L-seryl-L-tyrosyl)glycine 2-carboxyhydrazide t-butyl ester (III); condensing N-carboxy-L-proline N-benzyl ester with glycine ethyl ester in the presence of dicyclohexylcarbodiimide, treating the resulting product with ammonia and then hydrogenolyzing, to obtain 2-[(L-prolyl)amino]acetamide, which is condensed with N-carboxy-N.sup.G -nitro-L-arginine N-t-butyl ester in the presence of dicyclohexylcarbodiimide and N-hydroxysuccinimide to obtain N-[N-(N-carboxy-N.sup.G -nitro-L-arginyl)-L-prolyl)]glycinamide N-t-butyl ester (IV); or alternatively condensing L-proline methyl ester with N-carboxy-N.sup.G -nitro-arginine N-t-butyl ester in the presence of dicyclohexylcarbodiimide, condensing the resulting product with glycine ethyl ester in the presence of dicyclohexylcarbodiimide, and treating the resulting product with ammonia to obtain the same compound IV as above; treating said compound IV with acid and then with N-carboxy-L-leucine N-benzyl ester 2,4,5-trichlorophenyl ester and hydrogenolyzing the resulting product in acetic acid, to obtain N-[N-[N-(N-L-leucyl)-L-arginyl]-L-prolyl]-glycinamide diacetate (V); condensing compound II with compound III by means of the azide method to obtain the hexapeptide N-[N-[N-[N-[N-(5-oxo-L-prolyl)-L-histidyl]-L-tryptophyl]-L-seryl]-L-tyrosyl]glycine 2-carboxyhydrazide t-butyl ester, or condensing N-[N-(5-oxo-L-prolyl)-L-histidyl]-L-tryptophan with compound III in the presence of dicyclohexylcarbodiimide to obtain the same hexapeptide as above, and deprotecting and converting the latter to its trifluoroacetate salt (VI); and condensing compound V with compound VI by means of the azide method, to obtain the decapeptide of formula I which is isolated as the diacetate salt and optionally converted to other pharmaceutically acceptable salts.
摘要:
N-[N-[N-[N-[N-(5-Oxo-L-prolyl)-L-histidyl]-L-tryptophyl]-L-seryl]-L-tyrosyl]glycine hydrazide trifluoroacetate is converted to N-[N-[N-[N-[N-(5-oxo-L-prolyl)-L-histidyl]-L-tryptophy]-L-seryl]-L-tyrosyl]glycine azide, a useful intermediate for preparing LH and FSH releasing hormone.
摘要:
Compounds of the formula 1 or 1a ##STR1## IN WHICH R is hydrogen or CONHCH.sub.2 CONHCH.sub.2 CH.sub.3 are disclosed. The compounds are obtained by a process which comprises the following step: preparing peptide fragments II, III, V and VII see below, by a series of condensations involving the reaction of an appropriately protected peptide having an activated ester group with an appropriately protected peptide having a free amino group; condensing ##STR2## by means of the azide method with ##STR3## followed by hydrogenolysis of the reaction product to obtain ##STR4## condensing the latter by means of the azide method with ##STR5## followed by treating the resulting compound with hydrazine hydrate to obtain ##STR6## condensing the latter by means of the azide method with ##STR7## in which R is hydrogen or CONHCH.sub.2 CONHCH.sub.2 CH.sub.3 to obtain the linear protected peptide ##STR8## in which R is as defined herein; thereafter said linear peptide is transformed into the desired cyclic peptide of formula 1 by deprotecting and oxidizing processes. In addition, the linear, reduced form of the peptide of formula 1a is obtained by deprotection of the aforementioned linear peptide or by reduction of the cyclic peptide. The peptides of formulae 1 and 1a are useful for the management of diabetes and the treatment of acromegaly. Methods for their use are also disclosed.
摘要:
A process for preparing the LH- and FSH-releasing hormone of the formula Ih--pyr--His--Trp--Ser--Tyr--Gly--Leu--Arg--Pro--Gly--NH.sub.2which is isolated as the hydrochloride salt and optionally converted to other pharmaceutically acceptable salts or to pharmaceutically acceptable metal complexes.
摘要:
.alpha.-Hydrazinocarboxamide and .alpha.-(.alpha.'-acylhydrazino)-carboxamide derivatives of formula I ##STR1## in which R.sup.1 and R.sup.2 each are lower alkyl or R.sup.1 and R.sup.2 together with the nitrogen atom to which they are joined form a piperidino or morpholino radical; R.sup.3 is hydrogen, lower alkanoyl, benzoyl, p-nitrobenzoyl, p-aminobenzoyl, p-chlorobenzoyl, isocyanoacetyl, or protected amino acyl radicals, for example, N-formylglycyl or ##STR2## (N-carbobenzoxyglycylglycyl); R.sup.4 is lower alkyl, CHR.sup.7 COOR.sup.8 or CH.sub.2 CH.sub.2 COOR.sup.8 wherein R.sup.7 is hydrogen or phenyl and R.sup.8 is hydrogen or lower alkyl; R.sup.5 is hydrogen or lower alkyl; or R.sup.4 and R.sup.5 together with the carbon atom to which they are joined form a cyclohexylidene radical; and R.sup.6 is a cyclohexyl or CHR.sup.9 COY wherein R.sup.9 is hydrogen or benzyl and Y is hydroxyl, lower alkoxy or amine, with the provisos that when Y is hydroxyl then R.sup.8 is hydrogen, that when Y is lower alkoxy than R.sup.8 is lower alkyl and that when Y is amino R.sup.4 is lower alkyl, are disclosed herein along with the related .alpha.-hydrazino-carboxamide and .alpha.-(.alpha.'-acylhydrazino)carboxamide compounds of formula III ##STR3## in which R.sup.1, R.sup.2, R.sup.3 , R.sup.5 and R.sup.7 are as defind above and Y is lower alkoxy. These compounds possess antibacterial activity. Methods for their preparation and use are disclosed also.
摘要:
The N-substituted dimeric cyclopeptide derivatives of formula ##STR1## in which A is a peptide residue having one to four amino acid residues; R.sup.1 is lower alkyl, phenyl or pheny(lower) alkylene; R.sup.2 is lower alkyl, cyclo(lower)alkyl or lower alkoxycarbonyl(lower)alkylene; R.sup.3 is a neutral amino acid side chain and a method for the preparation of the compounds of formula I are disclosed. The compounds of formula I are useful for treating microbial infections. Pharmaceutical compositions also are disclosed.
摘要:
Compounds of the formula HSCH.sub.2 CHR.sup.1 CO--Pro--R.sup.2 --R.sup.3 --OH in which R.sup.1 is hydrogen or lower alkyl, R.sup.2 is an amino acid residue exclusive of prolyl and R.sup.3 is an amino acid residue exclusive of glutamyl are useful for alleviating angiotensin related hypertension.