Compounds having the formula ##STR1## wherein R.sub.1 and R.sub.4 each is hydrogen, lower alkyl or phenyl-lower alkyl; R.sub.2 is lower alkyl; R.sub.3 is hydrogen, hydroxy or lower alkyl; R.sub.5 is hydrogen or lower alkyl; m is 2 or 3; and n is 0, 1 or 2; are useful analytical tools.
Renal-selective prodrugs for control of renal sympathetic nerve activity in the treatment of hypertension
申请人:G.D. Searle & Co.
公开号:US20030220521A1
公开(公告)日:2003-11-27
Renal-selective prodrugs are described which are preferentially converted in the kidney to compounds capable of inhibiting synthesis of catecholamine-type neurotransmitters involved in renal sympathetic nerve activity. The prodrugs described herein are derived from inhibitor compounds capable of inhibiting one or more of the enzymes involved in catecholamine synthesis, such compounds being classifiable as tyrosine hydroxylase inhibitors, or as dopa-decarboxylase inhibitors, or as dopamine-&bgr;-hydroxylase inhibitors. These inhibitor compounds are linked to a chemical moiety, such as a glutamic acid derivative, by a cleavable bond which is recognized selectively by enzymes located predominantly in the kidney. The liberated inhibitor compound is then available in the kidney to inhibit one or more of the enzymes involved in catecholamine synthesis. Inhibition of renal catecholamine synthesis can suppress heightened renal nerve activity associated with sodium-retention related disorders such as hypertension. Conjugates of particular interest are glutamyl derivatives of dopamine-&bgr;-hydroxylase inhibitors, of which N-acetyl-&ggr;-glutamyl fusaric acid hydrazide (shown below) is preferred.
1
Renal-selective prodrugs for control of renal smpathetic nerve activity in the treatment of hypertension
申请人:G.D. Searle & Co.
公开号:US20040101523A1
公开(公告)日:2004-05-27
Renal-selective prodrugs are described which are preferentially converted in the kidney to compounds capable of inhibiting synthesis of catecholamine-type neurotransmitters involved in renal sympathetic nerve activity. The prodrugs described herein are derived from inhibitor compounds capable of inhibiting one or more of the enzymes involved in catecholamine synthesis, such compounds being classifiable as tyrosine hydroxylase inhibitors, or as dopa-decarboxylase inhibitors, or as dopamine-&bgr;-hydroxylase inhibitors. These inhibitor compounds are linked to a chemical moiety, such as a glutamic acid derivative, by a cleavable bond which is recognized selectively by enzymes located predominantly in the kidney. The liberated inhibitor compound is then available in the kidney to inhibit one or more of the enzymes involved in catecholamine synthesis. Inhibition of renal catecholamine synthesis can suppress heightened renal nerve activity associated with sodium-retention related disorders such as hypertension. Conjugates of particular interest are glutamyl derivatives of dopamine-&bgr;-hydroxylase inhibitors, of which N-acetyl-&ggr;-glutamyl fusaric acid hydrazide (shown below) is preferred.
1
Bicyclic oxo-thiolactones, pharmaceutical compositions containing them, processes for their preparation and compounds useful as intermediates for their preparation
申请人:AMERICAN HOME PRODUCTS CORPORATION
公开号:EP0017390A2
公开(公告)日:1980-10-15
Disclosed herein are bicyclic oxo-thiolactones of the formula:
in which R, is hydrogen or lower alkyl; R2 and R3 are, independently, hydrogen, hydroxy, halogen, lower alkyl, lower alkoxy, or aryl; and R4, R5 and R6 are independently, hydrogen, lower alkyl, lower hydroxyalkyl, aryl or aryl-alkyl, except that R4 and R5 may not both be aryl
These compounds act as inhibitors or angiotension converting enzyme and are useful as agents for the treatment of hypertension in mammals. The compounds are stable against oxidation of the sulphur.
Also disclosed are methods of preparation of such compounds and novel intermediates having the formula
where Ra is hydrogen or an amino protecting group, Rb is hydrogen or a carboxylic acid protecting group, n is 1 or 0 and their salts.
Novel inhibitors of angiotensin converting enzyme having the general formula R-A-S-Z are disclosed as potent inhibitors of angiotensin converting enzyme and are useful anti-hypertensive agents.