Novel Syntheses of 2-Butyl-5-chloro-3H-imidazole-4-carbaldehyde: A Key Intermediate for the Synthesis of the Angiotensin II Antagonist Losartan
摘要:
Reaction of glycine methyl ester (19) with imidate 18 under carefully optimized conditions allowed preparation of the rather unstable imidazolinone 11 in ca. 90% yield. Reaction of 11 with POCl3/DMF followed by aqueous workup gave aldehyde 2, a key intermediate for the synthesis of the angiotensin II antagonist Losartan, in ca. 55% yield. Structural identification of intermediates and byproducts formed during both the reaction to prepare 11 and the reaction of 11 with POCl3/DMF allowed development of several closely related syntheses of aldehyde 2.
Styrylamidines are prepared by treating styrylsulfonylamidines with base. The styrylamidines are effective in the prevention of aggregation of blood platelets and as analgesics. Compounds of the invention are also useful as anticonvulsants, diuretics and antihypertensive agents. The styrylsulfonylamidines of the invention which serve as precursors to the styrylamidines also have analgesic properties. Illustrative of the styrylamidines of the present invention are 4-amino-N-(4-aminostyryl)benzamidine and N-(3,4-dichlorostyryl)acetamidine. An example of a styrylsulfonylamidine is N-(styrylsulfonyl)acetamidine.
The invention relates to pyrimidinone derivatives and the pharmaceutically acceptable salts thereof having remarkable antagonistic action against angiotensin II receptor, and thus useful in treating cardiovascular diseases caused by angiotensin II.
A novel series of nonpeptide angiotensinII (A II) antagonists containing a pyrimidinone ring which carries a C-linked biphenyltetrazole moiety and a carboxyheteroaryl group on the 3-position have been prepared. Their affinity for the AT1 receptor was determined in a binding assay on rat adrenal cortical membranes. The in vivo antihypertensive properties were tested by evaluating the inhibition of
NOVEL 1-(BIPHENYL-4-YL-METHYL)-1H-IMIDAZOLE DERIVATIVE AND PHARMACEUTICAL PRODUCT CONTAINING SAME
申请人:Miura Toru
公开号:US20120264753A1
公开(公告)日:2012-10-18
Disclosed is a novel 1-(biphenyl-4-yl-methyl)-1H-imidazole derivative represented by general formula (I), which has both angiotensin II receptor antagonist activity and PPAR-γ activating activity and is useful as a prophylactic and/or therapeutic agent for cardiovascular diseases and metabolic diseases. Also disclosed is a pharmaceutical composition which contains the novel 1-(biphenyl-4-yl-methyl)-1H-imidazole derivative. In general formula (I), ring A represents a group represented by formula (II) or (III); R
1
represents a C
1-6
alkyl group; R
2
represents a C
1-6
alkyl group which may be substituted by a hydroxy group, or a group represented by formula —CO—R
4
(wherein R
4
represents a hydroxy group, a C
1-6
alkoxy group, an amino group, a mono(C
1-6
alkyl)amino group, a di(C
1-6
alkyl)amino group, a morpholino group, a piperidino group or a pyrrolidino group); R
3
represents a halogen atom or a C
1-6
alkoxy group; and X and Y may be the same or different and each represents a nitrogen atom or CH.
[EN] PYRIMIDINONE DERIVATIVES<br/>[FR] DERIVES DE PYRIMIDINONE
申请人:BORYUNG PHARMACEUTICAL CO., LTD.
公开号:WO1996008476A1
公开(公告)日:1996-03-21
(EN) This invention relates to pyrimidinone derivatives and the pharmaceutically acceptable salts thereof having remarkable antagonistic action against angiotensin II receptor, and thus useful in treating cardiovascular diseases caused by angiotensin II.(FR) L'invention concerne des dérivés de pyrimidinone et leurs sels pharmaceutiquement acceptables. Lesdits dérivés, caractérisés par une activité antagoniste par rapport au récepteur de l'angiotensine II, permettent de traiter avantageusement les maladies cardiovasculaires imputables à l'angiotensine II.