Abstract:
Peptides of the formula I X-Arg-Val-Tyr-Ile-His-Pro-Phegly-OH (I) in which X represents the radical of an aliphatic carboxylic acid of up to 5 carbon atoms or the phthalic acid radical, and Phegly-OH represents L-C-phenylglycine, and a process of preparing them by condensing the O-tert. butyl ester of compound I, in which tyrosine is protected by tert. butyl, and X represents hydrogen, with carboxylic acids of the formula X-OH, in which X has the first mentioned meaning, according to the condensation methods usually employed in peptide chemistry.
Abstract:
PROBLEM TO BE SOLVED: To obtain a novel compound that has high affinity to bradykinin receptor and improved pharmacodynamic effect and is useful for treatment and prevention of hepatocirrhosis and Alzheimer's disease. SOLUTION: This novel compound is represented by formula I D is formula II [X is N, C-R (R is H, a halogen, a lower alkyl; X is N), C-R (R is H, a lower alkyl, an alkenyl; X is N), C-R (R is same as R )]; B is formula III (R and R are each H, a halogen, cyano; R is nitro, amino); R and R are each H, a halogen, a 1-3C alkyl}, typically 8-[6-chloro-2-cyano-3-(N- ethylaminocarbonylglycyloxy)-2-methylquinoline. The objective compound is prepared by reaction of a compound of formula IV with a compound of formula V in an inert solvent in the presence of a metal hydride or an alkali metal carbonate at 0-60 deg.C.
Abstract:
Peptides of the formula (I) A-B-C-E-F-K-(D)-Phe-G-M-F'-I (1) in which A is hydrogen, alkyl, alkanoyl, alkoxycarbonyl, alkylsulphonyl, cycloalkyl, aryl, aryloyl, arylsulphonyl, heteroaryl or an amino acid, each of which can optionally be substituted, B is a basic amino acid, C is a di- or tripeptide, E is the residue of an aromatic amino acid, F is, independently of one another, an amino acid which is optionally substituted in the side chain or is a direct bond, G is an amino acid, F' is defined as F o r can be -NH-(CH2)2-8 or optionally a direct bond, I is -OH, -NH2 or -NHC2H5, and K is a radical -NH-(CH2)1-4-CO- or is a direct bond, act as bradykinin antagonists. Their therapeutic uses comprise all pathological states promoted, induced or assisted by bradykinin and bradykinin-related peptides. The peptides of the formula (I) are prepared by known methods of peptide synthesis.
Abstract:
Compounds of the formula (I) in which R is, for example, ethyl, R is, for example, methyl, n is, for example, zero, R is, for example, COOH and R is, for example, SO2NHCONHCH3 are highly active antagonists of angiotensin II receptors.
Abstract:
La invencion se refiere a conjugados que consisten en derivados de piperidina o pirrolidina una o varias veces carboxilados y en piranosas, furanosas o polialcoholes enlazados a través de una cadena o un ciclo. Los grupos carboxilo de los derivados de piperidina pueden asentarse directamente en el anillo o estar enlazados con el anillo a través de una cadena corta. La invencion se refiere, además, a la preparacion de estos compuestos, así como a su empleo para la preparacion de medicamentos y agentes de diagnostico.
Abstract:
Fluoroalkyl- and fluoroalkoxy-substituted benzyloxy-azaheterocyclic compounds of formula (I) and their salts are new: X1-X3 = N or CR ; R , R = H or halo; R , R = H, halo, 1-5C alkyl or 2-5C alkenyl; R = 2-5C alkenediyl, halo, OR , SR , NHR , -COOR or COOH; 1-6C alkyl, 6-12C aryl or 6-12C aryl-1-3C alkyl (all optionally substituted by e.g. OR , SR , NO2, CN, NHR or halo); R , R = H, 1-5C alkyl, 3-5C alkenyl or 6-12C aryl-1-3C alkyl; R = 1-5C alkyl or 1-5C alkoxy (both substituted by 1 or more F or Cl); B = amino acid; D = 2-5C alkanediyl, 1-5C alkanediyl or -(CH2)n-Yp-(CH2)m-; E = O or S; Y = O, S or NR ; n, m = 0-3; o = 1-3; and p = 0 or 1.
Abstract:
Sulphur-containing bradykinin antagonist compounds of formula (I) and their salts are claimed: one of X1-X3 = COR , and the other X1-X4 = N, CR ; R ,R = H, halo, 1-6C alkyl, OR , SR , NHR , 6-12C aryl, (6-12C aryl)(1-3C alkyl), C(O)OR , C(O)H, 2-5C alkenyl, NO2, SO3R , CN, C(O)NHR , where alkyl, aryl, alkenyl may be substituted by C(O)(O)o(1-5C alkyl), OR , SR , NO2, CN, NHR , halo; R = (II); R ,R = e.g. H; R -R = H, 1-5C alkyl, 3-5C alkenyl, etc.; A = amino acid e.g. methionine, alanine, phenylalanine, etc.; R = H, C(O)(O)o(1-5C alkyl), C(O)(O)o(11-3C alkyl)(6-10C aryl); R = e.g. C(O)DE; D = 2-5C alkendiyl, 1-8C alkandiyl, (CH2)nYo(CH2)m, etc., where any of the groups are optionally substituted by e.g. OR ; E = H, 6-10C aryl, 1-9C heteroaryl, etc.;Y = O, S, NR ; n,m = 0-6; o = 0 or 1.