Nitrogen containing heteromatics with ortho-substituted P1s as factor Xa inhabitors
AssigneeDuPont Pharmaceuticals Company
InventorsRobert A. Galemmo, Jr., Lori L. Bostrom, Donald J. P. Pinto, Karen A. Rossi
Life of this patent
Estimating the term…
Loading patent…
AssigneeDuPont Pharmaceuticals Company
InventorsRobert A. Galemmo, Jr., Lori L. Bostrom, Donald J. P. Pinto, Karen A. Rossi
Estimating the term…
The present application describes nitrogen containing heteroaromatics with ortho-substituted P1's and derivatives thereof of formula I: or pharmaceutically acceptable salt or prodrug forms thereof, wherein J is N or NH and D is substituted ortho to G on E and may be CH2NH2, which are useful as inhibitors of factor Xa.
A compound of formula I:
Dependencies are inferred from the claim text.
Drawings are temporarily unavailable. Open the PDF at USPTO
From the US filing history. Foreign family members aren’t listed.
Not condensed with other rings: five-membered rings
Having two or three double bonds between ring members or between ring members and non-ring members: with hetero atoms or with carbon atoms having…
One oxygen atom attached in position 3 or 5: with aryl radicals attached to ring nitrogen atoms
With aryl radicals attached to ring nitrogen atoms: having sulfone or sulfonic acid radicals in the molecule
Term ended 21 Dec 2018 (estimated)
USPTO file history isn’t available for this patent, so only indexed dates are shown.
This invention relates generally to nitrogen containing heteroaromatics, with ortho-substituted P1 groups, which are inhibitors of trypsin-like serine protease enzymes, especially factor Xa, pharmaceutical compositions containing the same, and methods of using the same as anticoagulant agents for treatment and prevention of thromboembolic disorders.
WO 95/18111 addresses fibrinogen receptor antagonists, containing basic and acidic termini, of the formula:
wherein R1 represents the basic termini, U is an alkylene or heteroatom linker, V may be a heterocycle, and the right hand portion of the molecule represents the acidic termini. The presently claimed compounds do not contain the acidic termini of WO 95/18111.
Part A: 2-Carboxy-4-methoxyphenylhydrazine: 2-Nitro-5-methoxybenzoic acid (5.0 g) in methanol (150 mL) was shaken under an atmosphere of hydrogen (50 psi) in the presence of 10% palladium on carbon catalyst (0.5 g) until hydrogen uptake ceased (ca. 3 h). The methanol solution was purge with nitrogen, filtered through a pad of Celite® and evaporated. There was obtained 4.2 g (25.1 mmol) of the aniline; ESI mass spectrum analysis m/z (relative intensity) 168 (M+H, 100).
The aniline prepared above (4.2 g, 25.1 mmol) in concentrated hydrochloric acid (50 mL) was cooled to 0° C. and sodium nitrite (2.08 g, 30.2 mmol) in cold water (20 mL) was added dropwise. This mixture was stirred at 0° C. for 30 min −1 h then tin(II)chloride dihydrate (17.0 g, 75.4 mmol) in cold concentrated hydrochloric acid (25 mL) was added dropwise. This mixture was allowed to thaw to ambient temperature over 3-5 h then filtered and air dried for several more. The filter cake was broken up and dried further in a vacuum oven at 60° C. overnight. There was obtained 8.76 g of 2-carboxy-4-methoxyphenylhydrazine tin salt.
Part B: Ethyl 2-N-(methoxy)imino-4-oxopentanoate: A mixture of ethyl pentanoate-2,4-dione (24.5 g, 154.9 mmol) and methoxyamine hydrogen chloride (13.58 g, 162.6 mmol) in ethanol (100 mL) was allowed to stand over activated 3 Å molecular sieves (75 g) at ambient temperature for 18 h. Following removal of the molecular sieves by filtration, dichloromethane (100 mL) was added and the reaction filtered. The resulting solution was evaporated and the residue applied to a silica gel column. The title compound was isolated in a homogenous form by elution with 5:1 hexane:ethyl acetate to give 9.09 g of product.