WO2003094853A2 - Compositions and methods for combating lower urinary tract dysfunctions with delta opioid receptor agonists - Google Patents
Compositions and methods for combating lower urinary tract dysfunctions with delta opioid receptor agonists Download PDFInfo
- Publication number
- WO2003094853A2 WO2003094853A2 PCT/US2003/014730 US0314730W WO03094853A2 WO 2003094853 A2 WO2003094853 A2 WO 2003094853A2 US 0314730 W US0314730 W US 0314730W WO 03094853 A2 WO03094853 A2 WO 03094853A2
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- WO
- WIPO (PCT)
- Prior art keywords
- opioid receptor
- delta opioid
- receptor agonist
- solution
- alpha
- Prior art date
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K31/00—Medicinal preparations containing organic active ingredients
- A61K31/33—Heterocyclic compounds
- A61K31/395—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
- A61K31/495—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with two or more nitrogen atoms as the only ring heteroatoms, e.g. piperazine or tetrazines
- A61K31/496—Non-condensed piperazines containing further heterocyclic rings, e.g. rifampin, thiothixene or sparfloxacin
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K31/00—Medicinal preparations containing organic active ingredients
- A61K31/33—Heterocyclic compounds
- A61K31/395—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
- A61K31/495—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with two or more nitrogen atoms as the only ring heteroatoms, e.g. piperazine or tetrazines
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K45/00—Medicinal preparations containing active ingredients not provided for in groups A61K31/00 - A61K41/00
- A61K45/06—Mixtures of active ingredients without chemical characterisation, e.g. antiphlogistics and cardiaca
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P13/00—Drugs for disorders of the urinary system
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P13/00—Drugs for disorders of the urinary system
- A61P13/02—Drugs for disorders of the urinary system of urine or of the urinary tract, e.g. urine acidifiers
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P13/00—Drugs for disorders of the urinary system
- A61P13/08—Drugs for disorders of the urinary system of the prostate
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P13/00—Drugs for disorders of the urinary system
- A61P13/10—Drugs for disorders of the urinary system of the bladder
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P25/00—Drugs for disorders of the nervous system
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P43/00—Drugs for specific purposes, not provided for in groups A61P1/00-A61P41/00
Definitions
- the present invention relates to lower urinary tract dysfunctions in mammals, and particularly, to compositions and methods of treating urinary tract disorders using delta opioid receptor agonists to modulate contraction and relaxation of muscles controlling micturition.
- Continence requires input from the central nervous system (CNS) and integrity of lower urinary tract function.
- CNS central nervous system
- the role of the CNS is complex and not fully understood, however, it is believed that the parasympathetic, sympathetic and somatic nerves innervate the main structures involved in the maintenance of continence.
- the physiology of micturition (urination) is complex; however a basic understanding is necessary to appreciate the etiology and treatment of incontinence.
- the detrusor muscle stretches allowing the bladder to expand.
- stretch receptors within the bladder wall are stimulated, giving the brain information regarding the amount of urine within the bladder.
- the sympathetic nervous system is stimulated and parasympathetic system is inhibited resulting in internal sphincter contraction and detrusor relaxation.
- the inhibitory signals from the brain are replaced by impulses that stimulate the parasympathetic system resulting in detrusor contraction, and inhibit the sympathetic system resulting in internal sphincter relaxation.
- the intravesicle pressure then rises to a point at which it exceeds the resistance within the urethra, and urine flows out of the bladder.
- the brain Once the bladder is emptied, the brain again sends impulses resulting in parasympathetic inhibition and sympathetic stimulation resulting in detrusor relaxation and internal sphincter contraction.
- the urinary bladder is again ready to be filled with urine.
- dysuria includes urinary frequency, nocturia and urgency, and may be caused by cystitis, prostatitis, benign prostatic hypertrophy (BPH) or neurological disorders.
- Enuresis refers to the involuntary passage of urine at night or during sleep.
- treatment can follow, which may variously include behavioral, surgical and/or pharmacological therapeutic approaches.
- Behavioral therapy may include muscle exercise, adjustment of the timing or amount of fluid ingested, and/or prompted voiding.
- Behavioral therapy may include muscle exercise, adjustment of the timing or amount of fluid ingested, and/or prompted voiding.
- such methods are dependent on motivation and in some settings, such as institutions, the dedication of the nursing staff in charge of the management of incontinent patients.
- Surgery may be required to correct certain disorders, such as blockage, enlarged prostate, and weak pelvic muscles but surgery is considered a last resort because of the inherent complications that may occur concurrently with surgery.
- Drug therapy is more widely used as a urinary tract dysfunction-combating approach in place of behavioral therapy and surgery.
- a variety of therapeutic drugs have been used, including: alpha-adrenergic agonists, such as phenylpropanolamine and pseudoephedrin; anticholinergics, such as oxybutynin, propantheline, dicyclomine and tolterodine; alpha-adrenergic antagonists, such as prazosin, terazosin and doxazosin; and tricyclic antidepressants.
- alpha-adrenergic agonists such as phenylpropanolamine and pseudoephedrin
- anticholinergics such as oxybutynin, propantheline, dicyclomine and tolterodine
- alpha-adrenergic antagonists such as prazosin, terazosin and doxazosin
- tricyclic antidepressants such as adrenergic antagonists, such as pr
- the present invention relates in one aspect to a method of combating urinary tract dysfunctions by administering to a subject in need of such treatment a pharmaceutical composition comprising a delta opioid receptor agonist in an amount effective to reduce the effects of the urinary tract dysfunction.
- the pharmaceutical composition may further comprise an additional active agent that has been found to be effective to treat urinary tract dysfunctions, albeit with some negative side effect(s), e.g., alpha-adrenergic agonists, anticholinergics, alpha-adrenergic antagonists and tricyclic antidepressants, whereby reduced dosages of such additional active agent enable, in combination with the delta opioid receptor agonist, ameliorate or even eliminate such negative side effect(s), or achieve other synergistic benefit by the combination.
- an additional active agent that has been found to be effective to treat urinary tract dysfunctions, albeit with some negative side effect(s), e.g., alpha-adrenergic agonists, anticholinergics, alpha-adrenergic antagonists and tricycl
- Another aspect of the present invention relates to a method for reducing the effects of urinary tract dysfunctions comprising: administering to the subject a pharmaceutical composition comprising an effective amount of a delta opioid receptor agonist selected from the group consisting of:
- Another aspect of the present invention relates to a method for reducing the effects of urinary tract dysfunctions comprising: administering to the subject an effective amount of at least one compound of the formula:
- Ar 1 is a 5- or 6-member carbocyclic or heterocyclic aromatic ring with atoms selected from the group consisting of carbon, nitrogen, oxygen and sulfur and may include thiophenyl, thiazolyl, furanyl, pyrrolyl, phenyl, or pyridyl, and having on a first carbon atom thereof a substituent Y and on a second ring carbon thereof a substituent R ,
- Y is selected from the group consisting of: hydrogen; halogen;
- R and R may be the same or different, and may be hydrogen, C1-C6 alkyl, C2-C6 alkenyl, C2-C6 allcynyl, C2-C6
- G is carbon or nitrogen;
- R is hydrogen, halogen, or C1-C4 alkyl, C2-C4 alkenyl, C2-C4 alkynyl;
- R , R and R may be the same or different, and are independently selected from hydrogen
- R is selected from the group consisting of: hydrogen; C 1 -C alkyl, C2-C6 alkenyl, C2-C6 alkynyl;
- C3-C6 cycloalkyl arylalkyl having C5-C10 aryl and Ci-Cg alkyl moieties; alkoxyalkyl having C1-C4 alkoxy and C1-C4 alkyl moieties;
- R COR where R is C1-C4 alkylene, and R is C1-C4 alkyl or C1-C4 alkoxy or hydroxy, or R 6 is
- Ar 2 is a 5 or 6-member carbocyclic or heterocyclic aromatic ring with atoms selected from the group consisting of carbon, nitrogen, oxygen and sulfur, and having on a carbon atom thereof a substituent X,
- X is selected from the group consisting of a halogen (fluorine, bromine, chlorine, iodine), hydrogen, hydroxy and esters thereof, carboxy and esters thereof; carboxy C1-C4 alkyl and esters thereof; carboxylic acid, alkoxy, hydroxymethyl, and esters thereof; and amino, and carboxamides and sulfonamides thereof; and pharmaceutically acceptable salts thereof.
- a halogen fluorine, bromine, chlorine, iodine
- a pharmaceutical composition for carrying out the methods of the invention.
- the pharmaceutical composition in one embodiment comprises an effective amount of at least one delta opioid receptor agonist selected from the group consisting of:
- the additional active agent may include, but is not limited to: alpha-adrenergic agonists, such as phenylpropanolamine and pseudoephedrein; anticholinergics, such as oxybutynin, propantheline, dicyclomine and tolterodine; alpha-adrenergic antagonists, such as prazosin, terazosin and doxazosin; and tricyclic antidepressants.
- compositions may be inco ⁇ orated in the composition as well, e.g., excipients, surfactants, preservatives, stabilizers, chelating agents and the like, as will be appreciated by those skilled in the art of pharmaceutical composition preparation and drug delivery.
- Administration of the pharmaceutical composition is carried out within the context of a predetermined dosing regime such that the delta opioid receptor agonist is effective in the treatment of lower urinary tract dysfunction.
- Delivery of the pharmaceutical compositions may be accomplished through any administrative route effective to provide relief from the urinary tract dysfunction, including, without limitation, oral, rectal, vaginal, topical, sub-lingual, mucosal, nasal, ophthalmic, subcutaneous, intramuscular, intravenous, transdermal, spinal, infrathecal, intra-articular, infra-arterial, sub- arachnoid, bronchial, lymphatic, transurethral, intracavernosal injection and urethral suppository administration.
- kits for treating a urinary tract dysfunction e.g., enuresis, incontinence or dysuria
- the kit comprises a delta opioid receptor agonist as disclosed herein, e.g., in a pharmaceutically acceptable salt or ester form, wherein the opioid receptor agonist is provided in an amount effective to reduce the effect of the urinary tract dysfunction.
- the kit may also include written instructions with respect to administration, dosing frequency, contraindications for observance by the patient, etc., in a kit container such as a carrying and/or storage case.
- Figures 1A, B and C summarize the delta opioid receptor affinity of illustrative delta opioid receptor agonists of the present invention.
- Figures 2A, B and C summarize the results of cystometric evaluation of two urodynamic parameters for illustrative delta opioid receptor agonists of the present invention administered by intravenous injection.
- Figure 3 summarizes the results of cystometric evaluation of two urodynamic parameters for illustrative delta opioid receptor agonists of the present invention that were orally administered.
- Figure 4 illustrates cystometric traces of test animals experiencing partial urethral restriction and the effects of orally administering compound 1 in accordance with the present invention.
- Traces la, lc; 2a, 2c; and 3a, 3c show the micturition pressure change due to bladder contraction and frequency of voiding.
- Traces lb, Id; 2b, 2d; and 3b, 3d show voiding volume collected in the cage.
- Delta opioid receptors are present in the central and peripheral nervous systems of many species including man. Delta opioid receptors have been identified as having a role in many bodily functions, such as circulatory and pain systems, immunomodulatory activities and gastrointestinal disorders.
- Agonists are agents that recognize and bind to delta opioid receptors thereby affecting biochemical and/or physiological pathways by eliciting a pharmacological response.
- One of the major neuronal effects of opioid receptor activation is blocking the release and liberation of neurotransmitters, such as acetylcholine and norepinephine. While not wishing to be bound by any specific mechanism of action, it is believed that the activation of the delta opioid receptor with one of the specific delta opioid receptor agonists disclosed in the present invention ultimately leads to the inhibition of the release of acetylcholine from parasympathetic nerve endings, and consequently prevents smooth muscle from contracting with a concomitant delay of urination.
- Transdermal delivery includes transdermal (or “percutaneous”) as well as transmucosal administration, i.e., delivery by passage of a drug through the skin or mucosal tissue and into the bloodstream.
- Topical administration as used herein means delivery of a topical drug or pharmacologically active agent to the skin or mucosa.
- Carriers or “vehicles” as used herein refer to carrier materials suitable for drug administration.
- Carriers and vehicles useful herein include any such materials known in the art, e.g., any liquid, gel, solvent, liquid diluent, solubilizer, or the like, which is nontoxic and which does not interact with other components of the composition in a deleterious manner.
- Effective amount of the compound for treating a urinary disorder as used herein is an amount that results in measurable amelioration of at least one symptom or parameter of the disorder.
- a delta opioid receptor agonist in the method of the present invention, an effective amount of a delta opioid receptor agonist is administered to a subject experiencing or susceptible to urinary dysfunction.
- suitable delta opioid receptor agonists include the following compounds:
- the delta opioid receptor agonist also may be administered in the form of an amide or prodrug and/or combination thereof.
- Salts, esters, amides and prodrugs of the active agents may be prepared using standard procedures known to those skilled in the art of synthetic organic chemistry and described, for example, by J. March, Advanced Organic Chemistry: Reactions, Mechanisms and Structure, 4th Ed. (New York: Wiley-Pnterscience, 1992).
- acid addition salts are prepared from the free base (typically wherein the neutral form of the drug has a neutral -NH 2 group) using conventional means, involving reaction with a suitable acid.
- the base form of the active agent is dissolved in a polar organic solvent, such as for example methanol or ethanol and the acid is added thereto.
- Suitable acids for preparing acid addition salts include both organic acids, e.g., acetic acid, propionic acid, glycolic acid, pyruvic acid, oxalic acid, malic acid, malonic acid, succinic acid, maleic acid, fumaric acid, tartaric acid, citric acid, benzoic acid, cinnamic acid, mandelic acid, methanesulfonic acid, ethanesulfonic acid, p-toluenesulfonic acid, salicylic acid, and the like, as well as inorganic acids, e.g., hydrochloric acid, hydrobromic acid, sulfuric acid, nitric acid, phosphoric acid, and the like.
- organic acids e.g., acetic acid, propionic acid, glycolic acid, pyruvic acid, oxalic acid, malic acid, malonic acid, succinic acid, maleic acid, fumaric acid, tartaric acid, citric acid, benzoic
- An acid addition salt may be reconverted to the free base by treatment with a suitable base.
- preparation of basic salts of acid moieties which may be present on an active agent are prepared in a similar manner using a pharmaceutically acceptable base such as sodium hydroxide, potassium hydroxide, ammonium hydroxide, calcium hydroxide, trimethylamine, or the like.
- salts derived from an appropriate base such as an alkali metal (for example, sodium, potassium), an alkaline earth metal (for example,
- salts of an amino group include salts of: organic carboxylic acids, such as acetic, lactic, tartaric, malic, lactobionic, fumaric, and succinic acids; organic sulfonic acids, such as methanesulfonic, ethanesulfonic, isethionic, benzenesulfonic and p-toluenesulfonic acids; and inorganic acids, such as hydrochloric, hydrobromic, sulfuric, phosphoric and sulfamic acids.
- Pharmaceutically acceptable salts of a compound having a hydroxyl group consist of the anion of such compound in combination with a suitable cation such as Na , NH4 , or NR'4
- R' is for example a Ci .4 alkyl group
- esters involves functionalization of hydroxyl and/or carboxyl groups that may be present within the molecular structure of the delta opioid receptor agonist.
- the esters of hydroxyl groups are typically acyl-substituted derivatives of free alcohol groups, i.e., moieties that are derived from carboxylic acids of the formula RCOOH, where R is alkyl, and preferably is lower alkyl.
- Esters can be reconverted to the free acids, if desired, by using conventional hydrolysis procedures.
- esters examples include carboxylic acid esters of the hydroxyl group in compounds of the present invention in which the non- carbonyl moiety of the carboxylic acid portion of the ester grouping is selected from straight or branched chain alkyl (e.g., n-propyl, t-butyl, n-butyl), alkoxyalkyl (e.g., methoxymethyl), arylalkyl (e.g., benzyl), aryloxyalky (e.g., phenoxymethyl), and aryl (e.g., phenyl); alkyl-, aryl-, or arylalkylsulfonyl (e.g., methanesulfonyl); amino acid esters (e.g., L-valyl or L-isoleucyl); dicarboxylic acid esters (e.g., hemisuccinate); carbonate esters (e.g., ethoxycarbonyl
- esters of carboxyl groups within the molecular structure of the drug are typically prepared from C ⁇ -C alcohols (e.g., ethanol, propanol) or arylalkyl alcohols (e.g., benzyl alcohols). Preparation of amides and prodrugs can be carried out in an analogous manner.
- C ⁇ -C alcohols e.g., ethanol, propanol
- arylalkyl alcohols e.g., benzyl alcohols
- chiral active agents may be in isomerically pure form, or they may be administered as a racemic mixture of isomers.
- Formulations of the present invention include those suitable for oral, nasal, topical (including buccal and sublingual), rectal, vaginal and/or parenteral administration.
- the pharmaceutical compositions may be in the form of solid, semi-solid or liquid dosage forms, such as, for example, tablets, suppositories, pills, capsules, powders, liquids, suspensions, creams, ointments, lotions or the like, preferably in unit dosage form suitable for single administration of a precise dosage.
- the compositions include an effective amount of the delta opioid receptor agonist in combination with a pharmaceutically acceptable carrier, if desired, and, in addition, may include other pharmaceutical agents, adjuvants, diluents, buffers, etc.
- the amount of active agent administered will, of course, be dependent on the subject being treated, the subject's weight, the manner of administration and the judgment of the prescribing physician.
- Urinary tract disorders and symptoms thereof include urgency, frequency, incontinence, urine leakage, enuresis, dysuria, hesitancy and difficulty emptying bladder.
- An additional parameter is the volume of urine.
- An effective amount of the delta opioid receptor agonist for treating the disorder can be determined by experimentation known in the art, such as by establishing a matrix of dosages and frequencies and comparing a group of experimental units or subjects to each point in the matrix. It will be understood that any clinically or statistically significant attenuation of any symptom or adverse aspect is within the scope of the invention. Clinically significant attenuation means perceptible to the patient and/or to the physician.
- a single patient may suffer from several symptoms of dysuria simultaneously, such as urgency and frequency, either or both of which may be reduced using the methods of the present invention.
- urgency and frequency either or both of which may be reduced using the methods of the present invention.
- any reduction in the frequency or volume of unwanted passage of urine is considered a beneficial effect of the present methods of treatment.
- the amount of the delta opioid receptor agonist that may be combined with a carrier material to produce a single dosage form preferably will be that amount effective to treat the urinary disorder.
- the amount of the delta opioid receptor agonist will range from about 1 % to 99% by weight of the total formulation, preferably from about 5% to about 70%, and most preferably from about 10% to about 30%.
- the amount of delta opioid receptor agonist administered will further be dependent on the subject being treated, the subject's weight, the manner of administration and the judgment of the prescribing physician.
- conventional nontoxic solid carriers include, for example, pharmaceutical grades of mannitol, lactose, starch, magnesium stearate, sodium saccharin, talc, cellulose, glucose, sucrose, magnesium carbonate, and the like.
- Liquid pharmaceutically administrable compositions can, for example, be prepared by dissolving, dispersing, etc., an active compound as described herein and optional pharmaceutical adjuvants in an excipient, such as, for example, water, saline, aqueous dextrose, glycerol, ethanol, or the like, to thereby form a solution or suspension.
- the pharmaceutical composition to be administered may also contain minor amounts of nontoxic auxiliary substances such as wetting or emulsifying agents, pH buffering agents and the like, for example, sodium acetate, sorbitan monolaurate, triethanolamine sodium acetate, triethanolamine oleate, etc.
- auxiliary substances such as wetting or emulsifying agents, pH buffering agents and the like, for example, sodium acetate, sorbitan monolaurate, triethanolamine sodium acetate, triethanolamine oleate, etc.
- the composition will generally take the form of a tablet or capsule, or may be an aqueous or nonaqueous solution, suspension or syrup. Tablets and capsules are preferred oral administration forms. Tablets and capsules for oral use will generally include one or more commonly used carriers such as lactose and corn starch. Lubricating agents, such as magnesium stearate, are also typically added. When liquid suspensions are used, the delta receptor agonist of the present invention may be combined with emulsifying and suspending agents. If desired, flavoring, coloring and/or sweetening agents may be added as well. Other optional components for incorporation into an oral formulation herein include, but are not limited to, preservatives, suspending agents, thickening agents, and the like.
- Parenteral administration is generally characterized by injection.
- Injectable formulations can be prepared in conventional forms, either as liquid solutions or suspensions, solid forms suitable for solubilization or suspension in liquid prior to injection, or as emulsions.
- sterile injectable suspensions are formulated according to techniques known in the art using suitable carriers, dispersing or wetting agents and suspending agents.
- the sterile injectable formulation may also be a sterile injectable solution or a suspension in a nontoxic parenterally acceptable diluent or solvent.
- the acceptable vehicles and solvents that may be employed are water, Ringer's solution and isotonic sodium chloride solution.
- sterile, fixed oils, fatty esters or polyols are conventionally employed as solvents or suspending media.
- Still another alternative approach for parenteral administration involves use of a slow release or sustained release system, such that a constant level of dosage is maintained.
- the active agent can be administered in a pharmaceutical formulation suitable for transurethral drug delivery.
- the formulation contains one or more selected carriers or excipients, such as water, silicone, waxes, petroleum jelly, polyethylene glycol (“PEG”), propylene glycol (“PG”), liposomes, sugars such as mannitol and lactose, and/or a variety of other materials, with polyethylene glycol and derivatives thereof particularly preferred.
- the dosage form typically comprises a biocompatible, biodegradable material, typically a biodegradable polymer.
- a biodegradable polymer typically include polyester, polyalkylcyanoacrylate, polyorthoester, polyanhydride, albumin, gelatin and starch. These and other polymers can be used to provide biodegradable microparticles that enable controlled and sustained drug release, which in turn will minimize the required dosing frequency.
- the compounds of the invention may also be delivered through the skin or muscosal tissue using conventional transdermal drug delivery systems, i.e., transdermal "patches" wherein a composition of the present invention is typically contained within a laminated structure that serves as a drug delivery device to be affixed to the body surface.
- the pharmaceutical composition is typically contained in a layer, or "reservoir,” underlying an upper backing layer.
- the laminated device may contain a single reservoir, or it may contain multiple reservoirs.
- the reservoir comprises a polymeric matrix of a pharmaceutically acceptable contact adhesive material that serves to affix the system to the skin during drug delivery.
- suitable skin contact adhesive materials include, but are not limited to, polyethylenes, polysiloxanes, polyisobutylenes, polyacrylates, polyurethanes, and the like.
- the active agent-containing reservoir and skin contact adhesive are present as separate and distinct layers, with the adhesive underlying the reservoir which, in this case, may be either a polymeric matrix as described above, or it may be a liquid or gel reservoir, or may take some other form.
- the backing layer in these laminates which serves as the upper surface of the device, functions as the primary structural element of the laminated structure and provides the device with much of its flexibility.
- the material selected for the backing layer should be substantially impermeable to the active agent and any other materials that are present.
- compositions of the invention may be administered in the form of suppositories for rectal administration.
- suppositories for rectal administration.
- suppositories can be prepared by mixing the agent with a suitable nonirritating excipient which is solid at room temperature but liquid at the rectal temperature and therefore will melt in the rectum to release the drug.
- suitable nonirritating excipient include cocoa butter, beeswax and polyethylene glycols.
- the weight of the suppository form will typically be in the range of approximately 1 mg to 50 mg. However, it will be appreciated by those skilled in the art that the size of the suppository can and will vary, depending on the potency of the active agent, the nature of the composition, and other factors.
- compositions of the invention may also be administered by nasal aerosol or inhalation.
- Nasal spray formulations comprise purified aqueous solutions of the active compounds with preservative agents and isotonic agents. Such formulations are preferably adjusted to a pH and isotonic state compatible with the nasal mucous membranes.
- Such compositions are prepared according to techniques well-known in the art of pharmaceutical formulation and may be prepared as solutions in saline, employing benzyl alcohol or other suitable preservatives, absorption promoters to enhance bioavailability, propellants such as fluorocarbons or nitrogen, and/or other conventional solubilizing or dispersing agents.
- the delta opioid receptor agonists of the present invention may be prepared in formulations for topical drug delivery, such as in ointments and creams.
- Ointments are semisolid preparations that are typically based on petrolatum or other petroleum derivatives.
- Creams containing the selected delta opioid receptor agonist are, as known in the art, viscous liquid or semisolid emulsions, either oil-in-water or water-in-oil. Cream bases are water-washable, and contain an oil phase, an emulsifier and an aqueous phase.
- the oil phase also sometimes called the "internal" phase, is generally comprised of petrolatum and a fatty alcohol such as cetyl or stearyl alcohol; the aqueous phase usually, although not necessarily, exceeds the oil phase in volume, and generally contains a humectant.
- the emulsifier in a cream formulation is generally a nonionic, anionic, cationic or amphoteric surfactant.
- the specific ointment or cream base to be used is one that will provide for optimum delivery of the active agent. As with other carriers or vehicles, an ointment base should be inert, stable, nonirritating and nonsensitizing.
- Ophthalmic formulations are prepared by a similar method to the nasal spray, except that the pH and isotonic factors are preferably adjusted to match that of the eye.
- the active agent in a "vectorized” form, such as by encapsulation of the active agent in a liposome or other encapsulant medium, or by fixation of the active agent, e.g., by covalent bonding, chelation, or associative coordination, on a suitable biomolecule, such as those selected from proteins, lipoproteins, glycoproteins, and polysaccharides .
- the pharmaceutical formulations discussed above may further contain one or more pharmacologically active agents in addition to a delta opioid receptor agonist of the present invention wherein the additional active agent is one that has been used to treat urinary tract dysfunctions and is administered in a lower dosage than normally administered without a delta opioid receptor agonist of the present invention, thereby alleviating or even eliminating the usual negative effects of the additional active agent.
- the additional pharmacologically active agent may include, but is not limited to, pseudoephedrine, ephedrine, phenylpropanolamine, prozosin, doxazosin, terazosin, antihistamines, tricyclic antidepressants, oxybutynin, propantheline, tolterodine, dicyclomine hydrochloride, indomethacin, baclofen, estrogens, imipramine, flavoxate, thiroidazine, haloperidol, benztropine, fiuphenazine, terbutaline, propanolol, verapamil, methyldopa, reserpine, guanethidine and narcotics.
- the delta opioid receptor agonists contemplated by the present invention include those illustratively described herein, as well as physiologically functional derivatives thereof.
- physiologically functional derivative is meant a pharmaceutically acceptable salt, ether, ester or salt of an ether or ester of the compounds set forth above or any other compound which, upon administration to the recipient, is capable of providing (directly or indirectly) the said compound or an active metabolite or residue thereof.
- the amount of delta opioid receptor agonist administered, and the dosing regimen used will, of course, be dependent on the particular delta opioid receptor agonist selected, the age and general condition of the subject being treated, the severity of the subject's condition, and the judgment of the prescribing physician, hi general, while the effective dosage of compounds of the invention for therapeutic use may be widely varied in the broad practice of the invention, depending on the specific condition involved, as readily determinable within the skill of the art, suitable therapeutic doses of the compounds of the invention, for each of the appertaining compositions described herein, and for achievement of therapeutic benefit in treatment of each of the conditions described herein, will preferably in the range of 10 micrograms ( ⁇ g) to 500 milligrams (mg) per kilogram body weight of the recipient per day, more preferably in the range of 50 ⁇ g to 75 mg per kilogram body weight per day, and most preferably in the range of 1 mg to 50 mg per kilogram body weight per day.
- orally administered dosages typically are at least twice, e.g., 2-10 times, the dosage levels used in parenteral administration methods, for the same active ingredient.
- dosage levels for compounds of the present invention may be on the order of 5- 200 mg/70 kg body weight/day.
- typical active agent dose levels are on the order of 10-100 mg per tablet.
- the daily dosage when administered locally will be less than the dosage normally given in conjunction with systemic modes of administration, and typically, the delta opioid receptor agonist will be administered one to four times daily.
- a large initial loading dose can be used to achieve effective levels of the delta opioid receptor agonist and can be followed by smaller doses to maintain those levels.
- the dosing regimen can be modulated in order to achieve satisfactory results in treating the urinary disorder.
- the invention also encompasses a kit for patients to carry out the present method of treating lower urinary tract dysfunctions.
- the kit contains the pharmaceutical composition to be administered and/or a device for administering the pharmaceutical composition (e.g., a transurethral drug delivery device such as a syringe, a transdermal patch, etc.), a container, preferably sealed, for housing the composition and/or the delivery device during storage and prior to use, and instructions for carrying out drug administration in an effective manner.
- the formulation may consist of a delta opioid receptor agonist of the present invention in unit dosage form.
- the kit may contain multiple formulations of different dosages of the same agent.
- the instructions may be in written or pictographic form, or can be provided on recorded media including audio tape, video tape, or the like.
- the solution was diluted with anhydrous tetrahydrofuran (1000 mL), cooled to ⁇ 0 °C in an ice/isopropanol bath, and stirred under nitrogen during the addition over ⁇ 20 min of phenylmagnesium bromide (1.0 M in tetrahydrofuran, 500 mL, 500 mmol) through a wide-bore double-tipped needle.
- phenylmagnesium bromide 1.0 M in tetrahydrofuran, 500 mL, 500 mmol
- a suspension of magnesium salts began to form almost immediately, but did not become sufficiently thick to preclude efficient stirring. Initially the suspension was a yellow ochre in color, which persisted until about two-thirds of the Grignard reagent had been added, when the color of the reaction mixture changed rapidly to a ruddy brown.
- the organic layer was separated and washed successively with 1M NaOH (3 x 1000 mL), water (3 x 1200 mL) and saturated aqueous sodium chloride solution (750 mL).
- Ethyl acetate (75 mL) was added to the partially crystallizing suspension, yielding a thick slurry of light-colored crystals in a dark mother liquor.
- the suspension was filtered, and the solid was washed sparingly with cold ethyl acetate and dried under vacuum at room temperature to yield a slightly off-white solid (38.31 g).
- the dark filtrate and washings were evaporated to a dark oil, which again partially crystallized on standing.
- the reaction mixture was stirred under nitrogen for 2 h at room temperature, evaporated to dryness, the residue dissolved in ethyl acetate (120 mL) and diluted with ether (300 mL). The solution was washed with dilute sodium carbonate solution (saturated:H 2 0, 1:3, 3 x 200 mL). The organic solution was diluted with pentane (800 mL) and extracted with 3M hydrochloric acid (5 x 40 mL), followed by 1*M t hydrochloric acid (3 x 50 mL, alternating with water (3 x 50 mL)). The combined aqueous extracts were filtered to remove a small amount of suspended solid and the pH adjusted to 12 with 5 M NaOH.
- the product was recrystalized by dissolving with stirring in hot isopropanol (39 mL) and heating to a gentle boil in a 250 mL Erlenmeyer flask. Water was added in portions until a permanent turbidity was observed in the gently boiling solution (22 mL water added). The flask was cooled to room temperature with stirring, and then was cooled in an ice-water bath with continued stirring for a further lh. The crystals were collected by filtration, washing with cold 2:1 isopropanol/water, to give white crystals (10.11 g, 96%). Calc. for C 31 H 38 FN 3 ⁇ : C, 76.35; H, 7.85; N, 8.62; F, 3.90.
- 3-tert-Butyldimethylsilyloxyphenylmagnesium bromide was formed by the slow addition of a mixture 3-bromophenoxy-tert-butyldimethylsilane (27.3 g, 92.6 mmol) and dibromoethane (3.45 g, 18.4 mmol) in 100 mL of inhibitor-free anhydrous tetrahydrofuran to a solution of magnesium turnings (3.57 g, 147 mmol) in 200 mL of inhibitor-free anhydrous tetrahydrofuran at reflux. After stirring for one hour at reflux the light brown clear mixture was cooled to room temperature.
- the reaction mixture was filtered to remove the white crystalline diethylamine hydrochloride by-product.
- the crystals were washed with ethyl acetate (2 x 600 mL), and the washings set aside.
- the tetrahydrofuran filtrate was evaporated, and the residue dissolved in the ethyl acetate washings.
- the solution was washed sequentially with 1 M-hydrochloric acid (2 x 600 mL), water 2 x 300 mL), dilute sodium carbonate solution (saturated:H 2 0, 1:1, 2 x 600 mL), water (2 x 300 mL) and saturated sodium chloride solution (300 mL).
- the ethyl acetate solution was washed with 4 x 200 mL of 1 M sodium hydroxide, 200 mL of water, and 200 mL of saturated aqueous sodium chloride.
- the organic layer was dried over anhydrous magnesium sulfate and the solvent was removed to give 32.7 g of dark oil.
- the oil was dissolved in 250 mL of tetrahydrofuran and 250 mL of 3 M hydrochloric acid and stirred for 2 hours at room temperature.
- the reaction solution was extracted with 3 x 250 mL of 2:1 diethyl ether/ethyl acetate. Ethyl acetate (300 mL) was added to the aqueous layer and pH was adjusted to 8 with aqueous sodium hydroxide.
- Methyl chloroacetate (350 mL, 434 mg, 4 mmol) was added to the stirred suspension under nitrogen and the reaction was stirred overnight at ambient temperature.
- the reaction mixture was partially neutralized by the passage of carbon dioxide gas (from dry ice), then glacial acetic acid added until the suspension showed a pH of 5 as measured by moistened indicator strips.
- the reaction mixture was evaporated to dryness, and the residue partitioned between ethyl acetate (10 mL) and 1 M HC1 (5 mL).
- the organic layer was extracted with 1 M HC1 (2 3 mL) and the pH of the combined acidic extracts was adjusted to 8 with saturated sodium carbonate solution.
- 3-Fluoro-N-methylaniline was prepared from 3-fluoroaniline using a modified reductive amination.
- 1-hydroxymethylbenzotriazole was prepared by adding 37% aqueous formaldehyde to benzotriazole at 40 °C in a 1:1 ratio, then cooling to room temperature to precipitate the product.
- the crude acid chloride was then dissolved in 150 mL of dry tetrahydrofuran, and cooled in an ice/water bath. N-methyl-3-fluoroaniline hydrochloride (13.05 g, 80.8 mmol) was added. Triethylamine (35 mL, 250 mmol) in 50 mL of dry tetrahydrofuran was then added dropwise via an addition funnel. The cloudy solution was allowed to warm to room temperature over 1 hour, and allowed to stir overnight. To remove the copious amount of precipitate, 100 mL of diethyl ether was added and the reaction mixture was filtered. After rinsing the salts with more ether, the solvents were removed under reduced pressure.
- the mixture was refluxed for 2-3 hours under nitrogen, and -150 mL of toluene/water azeotrope was collected. The remaining toluene was removed under reduced pressure. Due to the water-sensitive nature of the adduct, the amber/yellow-colored oil crude material was used for the subsequent reaction.
- the crude benzotriazole adduct described above was dissolved in 100 mL tetrahydrofuran and added to 40 mL of 1M phenylmagnesium bromide in tetrahydrofuran (40 mmol) via a double- ended needle.
- the reaction was slightly exothermic and turned into a yellow-brown, cloudy solution.
- the reaction was quenched with 5 mL of saturated ammonium chloride solution. Having stirred this for about half an hour, a generous amount of anhydrous magnesium sulfate was added. Filtering and concentrating the solution under reduced pressure gave the crude product contaminated with benzotriazole.
- This residue was dissolved in 150 mL ethyl acetate and 100 mL diethyl ether, and extracted with IM NaOH solution (4 x 100 mL) to remove the benzotriazole.
- the organic layer was extracted with 2N HC1 solution (2 x 75 mL).
- the combined aqueous acidic extracts were adjusted to pH 2.5 with 25% aqueous NaOH solution, extracted with ethyl acetate (3 x 75 mL), and the aqueous portion discarded.
- the combined organic extracts was then adjusted to pH 9 with IM NaOH solution and separated.
- 3-Fluoro-N-methylaniline was prepared from 3-fluoroaniline using a modified reductive amination.
- 1 -hydroxymethylbenzofriazole was prepared by adding 37% aqueous formaldehyde to benzotriazole at 40 °C in a 1 : 1 ratio, then cooling to room temperature to precipitate the product. After filtration the hydroxymethylbenzofriazole (125 g) was heated to reflux in toluene with 3-fluoroaniline (92.2 g). Water was removed azeotropically using a Dean-Stark trap. After three hours, the mixture was cooled to room temperature, then refrigerated for several hours to complete precipitation.
- 3-carboxybenzaldehyde (Fluka; 12.01 g, 80 mmol) was slurried in 80 mL of dry toluene and thionyl chloride (7 mL, 96 mmol) and 5 drops of DMF.
- a reflux condenser with a calcium sulfate drying tube attached was placed on the flask. The mixture was refluxed for 1 hour after the solution went clear, and then allowed to cool. The volatiles were removed on the rotovap. The residue was pumped on briefly on a vacuum pump. The crude acid chloride was then dissolved in 150 mL of dry tetrahydrofuran, and cooled in an ice/water bath.
- N-methyl-3- fluoroaniline hydrochloride 13.05 g, 80.8 mmol was added.
- Triethylamine 35 mL, 250 mmol was then added dropwise via an addition funnel.
- the cloudy solution was allowed to warm to room temperature over 1 hour, and allowed to stir overnight.
- 100 mL of diethyl ether was added and the reaction mixture was filtered. After rinsing the salts with more ether, the solvents were removed under reduced pressure. The residue was extracted with ethyl acetate, washed with IN HC1 twice, then with water, sodium carbonate solution, and saturated NaCl solution.
- the mixture was refluxed for 2-3 hours under nitrogen, and -75 mL of toluene/water azeotrope was collected. The remaining toluene was removed under reduced pressure. Due to the water-sensitive nature of the adduct, the amber/yellow-colored oil crude material was used for the subsequent reaction.
- the reaction was slightly exothermic and turned into a yellow-brown, cloudy solution. After stirring under nitrogen at room temperature for 2 hours, the reaction was quenched with 3-4 mL of saturated ammonium chloride solution. Having stirred this for about half an hour, a generous amount of anhydrous magnesium sulfate was added. Filtering and concentrating the solution under reduced pressure gave the crude silyl ether contaminated with benzotriazole by-product. This residue was dissolved in ethyl acetate and extracted with 10%) aqueous NaOH solution three times to remove most of the benzotriazole. The organic layer was washed with saturated sodium chloride solution, dried over sodium sulfate/magnesium sulfate, and the ethyl acetate was removed under reduced pressure.
- the t-butyldimethylsilyl protecting group was removed by dissolving the residue in 40 mL of tetrahydrofuran and adding 40 mL of 3N aqueous HC1 at room temperature. The solution warmed upon acid addition. The mixture was stirred for 90 minutes at room temperature. The reaction was concentrated under reduced pressure to remove most of the organic solvent. The residue was partitioned between water and a solution of diethyl ether : ethyl acetate / 3:2. The acidic aqueous layer was extracted twice with a solution of diethyl ether : ethyl acetate / 3:2.
- Methylene chloride (-100 mL) was added and stirred briskly. This was separated and the aqueous layer was again washed with more methylene chloride.
- the combined extract was dried over sodium sulfate/magnesium sulfate, and the solvent was evaporated under reduced pressure.
- the crude material was chromatographed on silica gel column (roughly 20 - 25 g of silica gel per gram of crude material) eluting first with methylene chloride, then with 20% ethyl acetate in methylene chloride to remove the less polar contaminant. Then, the column was eluted with a solution of ethyl acetate containing 2% ammonium hydroxide (solution A) in a gradient with methylene chloride (solution B), quickly increasing in polarity from 25% to 100% (solution A in B). The desired fractions were combined and the solvent was removed under reduced pressure to give a 10:1 mixture of diastereomers in 60% crude yield.
- the allyl portion was removed using Pd(dba) 2 /DPPB in the presence of thiosalicyhc acid by the method of Genet [J.P. Genet, S. Lemaire-Audoire, M. Savignac, Tetrahedron Letters, 36. 1267-1270 (1995)].
- the reaction was concentrated and the residue was dissolved m 50 mL ethyl acetate and 100 mL diethyl ether. After washing this with Na 2 C0 3 solution (3 x 100 mL) and water (1 x 100 mL), the organic solution was extracted with 3 N HCl (3 x 20 mL) and 1 N HCl (1 x 20 mL).
- the acidic extract was adjusted to pH 8.5 using NaOH solution and extracted with dichloromethane (3 x 25 mL). The solution was dried (Na 2 S0 4 /MgS0 4 ) and concentrated under reduced pressure. T he residual oil was purified by chromatography on silica gel (EtOAc + 2% NH 4 OH/CH 2 Cl 2 ) to give 4.44 g (7.6 mmol) of 3-((alpha-R)-alpha- ((2S,5R)-2,5-d ⁇ methyl-l-p ⁇ perazmyl)-3-(tr ⁇ fluoromethylsulfonyloxy)benzyl)-N-(3- fluorophenyl)-N-methylbenzamide as a viscous, deep amber-orange colored oil.
- the reaction was stirred for three days at room temperature under nitrogen, and then concentrated under reduced pressure.
- the residue was suspended in 15 mL ethanol, 10 mL of 10% w/v aqueous NaOH solution was added, and the reaction was stirred 2 hours at room temperature.
- the ethanol was removed under vacuum and the residue was partitioned between water and dichloromethane.
- the solution was adjusted to pH 8.5 using 3 N HCl, separated and extracted again with dichloromethane (2 x 15 mL). The solution was dried (Na 2 S ⁇ 4 /MgSO 4 ) and concentrated under reduced pressure.
- the reaction was slightly exothermic and turned into a yellow-brown, cloudy solution. After stirring under nitrogen at room temperature for 2 hours, the reaction was quenched with 5 mL of saturated ammonium chloride solution. Having stirred this for about 5 minutes, a generous amount of anhydrous magnesium sulfate was added. Filtering and concentrating the solution under reduced pressure gave the crude silyl ether contaminated with benzotriazole by-product. This residue was dissolved in ethyl acetate and extracted with IN aqueous NaOH solution (3 x 100 mL) to remove most of the benzotriazole. The organic layer was washed with saturated sodium chloride solution, dried over sodium sulfate / magnesium sulfate, and the ethyl acetate was removed under reduced pressure.
- the t-butyldimethylsilyl protecting group was removed by dissolving the residue in 50 mL anhydrous acetonitrile and adding tetraethyl-ammonium fluoride dihydrate (6.21 g, 33.5 mmol). After stirring for 1 hour under nitrogen at room temperature, the reaction was concentrated and the residue was dissolved in 100 mL ethyl acetate. The mixture was exfracted with dilute NaHC0 3 solution (3 x 75 mL) and with water (1 x 50 mL). The organic layer was diluted with 100 mL diethyl ether and extracted with 10% citric acid solution (5 x 20 mL) until no more colored material was extracted.
- n-Butyllithium (1.61 mL of 1.92 M solution; 3.10 mmol) was added to a mixture of N-(3- fluorophenyl)-3-iodo-N-methylbenzamide (1.0 g; 2.82 mmol) and 4-[3-(tert-butyl-dimethyl- silanyloxy)benzoyl]-piperidine-l -carboxylic acid tert-butyl ester (1.182 g; 2.82 mmol) in THF (150 mL) at -78 °C under nitrogen in one portion. The reaction was stirred under nitrogen overnight while the temperature warmed to room temperature.
- Tetrahydrofuran (70 mL) and 3 N HCl (50 mL) were added to the above crude 4-([3-(tert- butyldimethylsilanyloxy)phenyl] ⁇ 3-[N-(3-fluorophenyl)-N-methylcarbamoyl]phenyl ⁇ - methylene)piperidine-l -carboxylic acid tert-butyl ester (2.75 g).
- the resulting mixture was stirred at 60 °C for 4 h.
- the reaction mixture was cooled to room temperature, followed by the addition of water (100 mL).
- the resulting solution was extracted with diethyl ether (100 mL x 2).
- the remaining water layer was neutralized to pH ⁇ 9.
- the allyl group was removed from 3-((S)-((2S,5R)-4-allyl-2,5-dimethyl-l-piperazinyl)(2- methylphenyl)methyl)phenol (Example 7, 1.07 g, 2.2 mmol) using Pd(dba)2/DPPB in the presence of thiosalicylic acid by the method of Genet [J.P. Genet, S. Lemaire-Audoire, M. Savignac, Tetrahedron Letters, 36, 1267-1270 (1995)]. The reaction was concentrated and the residue was dissolved in 50 mL ethyl acetate and 50 mL diethyl ether.
- Part 3 Reaction of intermediates: The solution of Part 1 was added to the Grignard reagent prepared in Part 2 dropwise via a syringe at room temperature under N 2 in a span of 35 minutes while the reaction solution was stirred vigorously. The reaction was stirred at room temperature under N 2 overnight. The reaction was quenched by the addition of saturated aqueous NH C1 (10 mL). The resulting mixture was diluted by the addition of EtOAc (120 mL) and water (120 mL). The cloudy mixture was filtered through a Celite pad. The filtrate was poured into a separatory funnel. The organic layer and water layer were separated.
- Aqueous hydrochloric acid (3 M, 7 mL) was added to a solution of 4- ⁇ (R)-((2R,5S)-4-allyl- 2,5-dimethyl-piperazin-l-yl)-[3-(tert-butyl-dimethylsilanyloxy)-phenyl]-methyl ⁇ -N,N- dimethyl-benzenesulfonamide (1.3 g) in THF (15 mL). The mixture was stirred at room temperature overnight. Water (15 mL) was added to the reaction. The reaction mixture was extracted with diethyl ether (25 mL x3).
- the resulting mixture was poured into a separatory funnel.
- the EtOAc layer and acidic water layer were separated.
- the acidic water layer was extracted by EtOAc (100 mL x 3).
- the reaction was placed in an oil bath and heated at a bath temperature maintained below 120 °C. The mixture was allowed to reflux for 1 hour after a clear solution was obtained and then cooled to room temperature. The solution was diluted with anhydrous toluene, and all volatiles were removed under vacuum.
- the crude acid chloride was dissolved in 200 mL of dry tetrahydrofuran and cooled in an ice/water bath. Triethylamine (27.88 mL, 200 mmol) in 70 mL of dry tetrahydrofuran was added dropwise via an addition funnel, followed by diethylamine (10.45 mL, 100 mmol). The cloudy solution was allowed to warm to room temperature over 1 hour and stirred overnight. Water was added and the product was extracted with dichloromethane. The organic layer was washed with water and saturated sodium chloride solution and dried over sodium sulfate, and the solvent was removed under vacuum.
- the crude benzotriazole adduct was dissolved in -20 mL of tetrahydrofuran and added to a solution of 3-phenoxy-tert-butyldimethylsilane magnesium bromide (from Example 5, 1.75 equiv.) via a double-ended needle. After stirring under nitrogen at room temperature for 2 hours, the reaction was quenched with 6-8 mL of saturated ammonium chloride solution. After stirring for 30 minutes, a generous amount of anhydrous magnesium sulfate was added. Filtering and concentrating the solution under reduced pressure gave the crude silyl ether contaminated with benzotriazole by-product.
- the t-butyldimethylsilyl protecting group was removed by dissolving the residue in 80 mL of tetrahydrofuran and adding 80 mL of 3N aqueous HCl at room temperature. The solution warmed upon acid addition. The mixture was stirred for 90 minutes at room temperature. The reaction was concentrated under reduced pressure to remove most of the organic solvent. The residue was partitioned between water and a solution of diethyl ether : ethyl acetate / 3:2. The acidic aqueous layer was extracted twice with a solution of diethyl ether : ethyl acetate / 3:2.
- Methylene chloride (-100 mL) was added and stirred briskly. This was separated and the aqueous layer was again washed with more methylene chloride.
- the combined methylene chloride extract was dried over sodium sulfate/magnesium sulfate, and the solvent was evaporated under reduced pressure.
- the crude material was chromatographed on a silica gel column (roughly 20 - 25 g of silica gel per gram of crude material) eluting first with methylene chloride, then with 20% ethyl acetate in methylene chloride to remove the less polar contaminant. Then, the column was eluted with a solution of ethyl acetate containing 2% ammonium hydroxide (solution A) in a gradient with methylene chloride (solution B), quickly increasing in polarity from 25% to 100% (solution A in B). The desired fractions were combined and the solvent was removed under reduced pressure. A 10:1 mixture of diastereomers (approx. 2.01 g) was obtained.
- the allyl group was removed using Pd(dba) 2 /DPPB in the presence of thiosalicylic acid by the method of Genet [J.P. Genet, S. Lemaire-Audoire, M. Savignac, Tetrahedron Letters, 36, 1267-1270 (1995)].
- the reaction was concentrated and the residue was dissolved in 50 mL ethyl acetate and 100 mL diethyl ether. After washing this with Na 2 C0 3 solution (3 x 100 mL) and water (1 x 100 mL), the organic solution was extracted with 3 N HCl (3 x 20 mL) and 1 N HCl (1 x 20 mL).
- the acidic extract was adjusted to pH 8.5 using NaOH solution and extracted with dichloromethane (3 x 25 mL). The solution was dried (Na 2 S0 4 /MgS0 ) and concenfrated under reduced pressure. The residual oil was purified by chromatography on silica gel (2% NH 4 OH in EtOAc /CH 2 C1 2 ) to give 4.39 g (8.32 mmol) of a viscous, deep amber- orange colored oil.
- the salt was made by dissolving the base in ethanol and titrating with 0.2M HCl in ethanol to pH 3.60.
- a group of opioid receptor agonists useful to treat urinary dysfunctions were evaluated for in vitro opioid receptor affinity in rat brain membranes ( ⁇ and ⁇ opioid) and guinea pig cerebellum (K opioid receptor).
- Membranes for radioligand binding were prepared from either rat whole brain or guinea pig cerebellum, supplied by Pel-Freeze Biological Inc. (Rogers, AR.).
- Tissues were homogenized in 50 mM TRIS (Tris[hydfoxymethyl]aminomethane) buffer (pH
- Radioligand binding assays were performed in 10 mM TRIS buffer (pH 7.4) containing 50 ⁇ g/ml soybean trypsin inhibitor, 1 mM EDTA, 5 mM MgCl 2 , and 100 ⁇ M PMSF.
- Tritium- labeled DAMGO ( ⁇ ), Deltorphin II ( ⁇ ), or U69593 (K) purchased from New England Nuclear were used as ligands in competitive experiments (2-3 x 10 ⁇ 10 M final concentrations) with non- specific binding defined by 0.5 x 10 " ⁇ M Naloxone (purchased from SIGMA Chemical Co.).
- mice Male rats weighing 200 to 250 grams were used. The rats were housed with free access to food and maintained on forced 12 hours alternating light-dark cycle at 22-24°C for at least one week, except during performance of the experiment.
- the rats were anesthetized with pentobarbital, 65 mg/kg i.p. and placed in a supine position. An approximately 10 mm long midline incision was made in the shaved and cleaned abdominal wall. The urinary bladder was freed from adhering tissues, emptied and then cannulated, via an incision at the dome with a polyethylene cannula (PE50), which was permanently sutured in place. The cannula was exteriorized through a subcutaneous tunnel in the refroscapular area, where it was connected with a plastic adapter to avoid the risk of removal by the rats.
- PE50 polyethylene cannula
- a polyethylene tubing (PE50) was inserted into the jugular vein and exteriorized in the refroscapular area. Since cystomefrographic parameters have been reported to be influenced by the time elapsed after catheter implantation, the rats were treated with 1 mg/kg Penicilline G, intramuscularly, to prevent infection and allowed to rest 3 days after implantation and before testing commenced.
- a polyethylene tube (PE50) was inserted into the stomach and was permanently sutured in place.
- the cannula was exteriorized through a subcutaneous tunnel in the refroscapular area, where it was connected with a plastic adapter to avoid the risk of removal by the rats.
- the rats were placed in Bollman's cages, the free tip of the bladder catheter was connected through a T-shaped tube to a pressure transducer (Grass PT300 or Gould P23) to record bladder pressure and to a peristaltic pump for continuous infusion, at a constant rate of 0.1 ml/min of saline solution into the urinary bladder.
- the infraluminal pressure signal during infusion was continuously recorded.
- miceturition pressure is defined as the maximal intravesical pressure induced by the contraction of detrusor during micturition.
- Data was calculated as the mean of testing results for several animals at each dosage. The drug effects were expressed as a percent relative to activity of the control data, which was set at 100%.
- Results of the csytomefrographic recordings performed 90 minutes after intravenous injection with several different testing compounds of the present invention are summarized in Figure 2 (Table 2).
- the results indicate that intravenous (i.v.) administration of compounds 1, 2, 3, 4, 10 and 12 effected an inhibition of bladder contractions.
- Compounds 1- 10 and 12 caused a decrease in the frequency of the bladder contractions (increase in the interval between bladder contractions, which reflects an increase in capacity of the bladder).
- Compounds 1, 2, 3, 4, 10 and 12 affected both parameters by causing a decrease in the intensity of bladder contractions and a decrease in the frequency of the bladder contractions.
- the externally dwelling plastic rod was removed, thus ensuring the lumen diameter was constrained to -lmm. Animals were given analgesic buprenorphine and allowed to recover. A second surgical procedure was performed to remove the urethral ligature 6 weeks after its placement and at the time the cystometric catheter is placed. The implantation of the plastic rod for six weeks in the urethra caused inflammation in the area and caused the test rats to experience instability of the bladder muscle similar to those side effects indicative of genuine urinary tract dysfunctions.
- the bladder catheter was connected through a T-shaped tube to a pressure transducer (Grass PT300 or Gould P23) to record bladder pressure isovolumetrically and to a peristaltic pump for continuous infusion, at a constant rate of 0.1 ml/min, of saline solution into the urinary bladder.
- the pressure signal during infusion was continuously recorded.
- FIG. 4 shows cystometric traces of urodynamic parameters for three test rats having compromised urinary tracts due to previously implanted obstructions. The traces illustrate urodynamic parameters for the test animals before administration of the testing compound and after oral administration of 10 mg kg of Compound 1. The traces on the left side of the plot show the pressure and voiding history (la and b, 2a and b, and 3a and b) of the three test animals before administration of compound 1.
- test animal #1 experienced multiple and strong contraction of the bladder muscle. Further from trace lb it can be recognized that the animal was voiding continuously showing almost no storage of urine in the bladder. The traces for the other two test animals are also indicative of an unstable bladder.
- the oral dose of compound 1 there was a marked improvement in contractions and volume storage. Traces lc and Id show that the frequency of the contraction and pressure of each contraction was greatly reduced. Further, frace Id shows that the volume capacity increased and the test animal had increased bladder capacity before voiding. Instead of the continuous voiding shown in frace lb, the test animal was voiding intermittently and therefore storing greater volumes of urine between voidings. Clearly, all three-test animals showed marked improvement in both frequency and intensity of pressure contractions (reduced) and quantity of volume storage after administering of compound 1.
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EP03726769.7A EP1501513B1 (en) | 2002-05-09 | 2003-05-09 | Compositions and methods for combating lower urinary tract dysfunctions with delta opioid receptor agonists |
MXPA04010934A MXPA04010934A (en) | 2002-05-09 | 2003-05-09 | Compositions and methods for combating lower urinary tract dysfunctions with delta opioid receptor agonists. |
JP2004502941A JP4637571B2 (en) | 2002-05-09 | 2003-05-09 | Compositions and methods for treating lower urinary tract dysfunction with delta opioid receptor agonists |
CA2525373A CA2525373C (en) | 2002-05-09 | 2003-05-09 | Compositions and methods for combating lower urinary tract dysfunctions with delta opioid receptor agonists |
AU2003228991A AU2003228991B8 (en) | 2002-05-09 | 2003-05-09 | Compositions and methods for combating lower urinary tract dysfunctions with delta opioid receptor agonists |
NZ536352A NZ536352A (en) | 2002-05-09 | 2003-05-09 | Compositions and uses for combating lower urinary tract dysfunctions with delta opioid receptor agonists |
IL16465404A IL164654A0 (en) | 2002-05-09 | 2004-10-18 | Compositions and methods for combating lower urinary tract dysfunctions with delta opioid receptor agonists |
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US10/434,004 US8476280B2 (en) | 2002-05-09 | 2003-05-08 | Compositions and methods for combating lower urinary tract dysfunctions with delta opioid receptor agonists |
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WO2006014133A1 (en) * | 2004-08-02 | 2006-02-09 | Astrazeneca Ab | Diarylmethyl piperazine derivatives, preparations thereof and uses thereof |
ES2283220A1 (en) * | 2006-04-12 | 2007-10-16 | Consejo Superior Investig. Cientificas | Use of delta opioid receptor agonists in the preparation of pharmaceutical compositions, pharmaceutical compositions that contain them and their applications in the treatment of tumours |
US7396834B2 (en) | 2002-11-07 | 2008-07-08 | Astrazeneca Ab | 4(Phenyl-piperazinyl-methyl) benzamide derivatives and their use for the treatment of pain or gastrointestinal disorders |
US7915413B2 (en) | 2001-05-18 | 2011-03-29 | Astrazeneca Ab | Compounds |
US7960389B2 (en) | 2002-11-07 | 2011-06-14 | Astrazeneca Ab | 4(phenyl-piperazinyl-methyl) benzamide derivatives and their use for the treatment of pain or gastrointestinal disorders |
US8129393B2 (en) | 2004-08-02 | 2012-03-06 | Astrazeneca Ab | Diarylmethyl piperazine derivatives, preparations thereof and uses thereof |
US20190046493A1 (en) * | 2016-02-25 | 2019-02-14 | Hisamitsu Pharmaceutical Co., Inc. | Liquid external preparation |
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CA2471400A1 (en) * | 2001-12-20 | 2003-07-03 | Femmepharma, Inc. | Vaginal delivery of drugs |
US7314880B2 (en) | 2003-01-02 | 2008-01-01 | Mount Cook Biosciences, Inc. | Cardioprotective delta opioid receptor agonists and methods of using same |
US9173836B2 (en) | 2003-01-02 | 2015-11-03 | FemmeParma Holding Company, Inc. | Pharmaceutical preparations for treatments of diseases and disorders of the breast |
AU2004203700B2 (en) * | 2003-01-02 | 2007-06-21 | Femmepharma Holding Company, Inc. | Pharmaceutical preparations for treatments of diseases and disorders of the breast |
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US20080153789A1 (en) * | 2006-12-26 | 2008-06-26 | Femmepharma Holding Company, Inc. | Topical administration of danazol |
US20110003000A1 (en) * | 2009-07-06 | 2011-01-06 | Femmepharma Holding Company, Inc. | Transvaginal Delivery of Drugs |
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US7915413B2 (en) | 2001-05-18 | 2011-03-29 | Astrazeneca Ab | Compounds |
US8022074B2 (en) | 2001-05-18 | 2011-09-20 | Astrazeneca Ab | 4-(phenyl-piperazinyl-methyl)benzamide derivatives and their use for the treatment of pain, anxiety or gastrointestinal disorders |
US7396834B2 (en) | 2002-11-07 | 2008-07-08 | Astrazeneca Ab | 4(Phenyl-piperazinyl-methyl) benzamide derivatives and their use for the treatment of pain or gastrointestinal disorders |
US7960389B2 (en) | 2002-11-07 | 2011-06-14 | Astrazeneca Ab | 4(phenyl-piperazinyl-methyl) benzamide derivatives and their use for the treatment of pain or gastrointestinal disorders |
WO2006014133A1 (en) * | 2004-08-02 | 2006-02-09 | Astrazeneca Ab | Diarylmethyl piperazine derivatives, preparations thereof and uses thereof |
JP2008508350A (en) * | 2004-08-02 | 2008-03-21 | アストラゼネカ・アクチエボラーグ | Diarylmethylpiperazine derivatives, processes for their preparation and uses thereof |
CN1993338B (en) * | 2004-08-02 | 2011-07-06 | 阿斯利康(瑞典)有限公司 | Diarylmethyl piperazine derivatives, preparations thereof and uses thereof |
US8129393B2 (en) | 2004-08-02 | 2012-03-06 | Astrazeneca Ab | Diarylmethyl piperazine derivatives, preparations thereof and uses thereof |
ES2283220A1 (en) * | 2006-04-12 | 2007-10-16 | Consejo Superior Investig. Cientificas | Use of delta opioid receptor agonists in the preparation of pharmaceutical compositions, pharmaceutical compositions that contain them and their applications in the treatment of tumours |
WO2007116114A1 (en) * | 2006-04-12 | 2007-10-18 | Consejo Superior De Investigaciones Científicas | Use of delta opioid receptor agonists in the preparation of pharmaceutical compositions, pharmaceutical compositions that contain them and their applications in the treatment of tumours |
US20190046493A1 (en) * | 2016-02-25 | 2019-02-14 | Hisamitsu Pharmaceutical Co., Inc. | Liquid external preparation |
Also Published As
Publication number | Publication date |
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CA2525373C (en) | 2012-04-24 |
RU2333209C2 (en) | 2008-09-10 |
EP1501513A4 (en) | 2009-08-26 |
MXPA04010934A (en) | 2005-02-14 |
JP2005525416A (en) | 2005-08-25 |
RU2333209C9 (en) | 2009-01-20 |
CN100508980C (en) | 2009-07-08 |
AU2003228991A1 (en) | 2003-11-11 |
CN1652787A (en) | 2005-08-10 |
IL164654A0 (en) | 2005-12-18 |
EP1501513B1 (en) | 2014-04-16 |
AU2003228991B8 (en) | 2009-07-02 |
US8476280B2 (en) | 2013-07-02 |
WO2003094853A3 (en) | 2004-08-19 |
US20040002503A1 (en) | 2004-01-01 |
JP4637571B2 (en) | 2011-02-23 |
CA2525373A1 (en) | 2003-11-20 |
NZ536352A (en) | 2008-07-31 |
EP1501513A2 (en) | 2005-02-02 |
RU2004133054A (en) | 2005-08-10 |
AU2003228991B2 (en) | 2007-12-06 |
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