Tropane-derivatives, their preparation and use

a technology of tropane derivatives and derivatives, applied in the field of new drugs, can solve the problems delay in onset of anti-depressant effect, and low efficacy, and achieve the effect of reducing the risk of undesirable central stimulating effect and reducing the risk of side effects

Inactive Publication Date: 2001-08-30
NEUROSEARCH AS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The delayed onset of anti-depressant effect is considered to be a serious drawback to currently used monoamine re-uptake inhibitors.
A strong dopamine re-uptake inhibiting activity is considered with the risk of undesirable central stimulating effects.

Method used

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  • Tropane-derivatives, their preparation and use
  • Tropane-derivatives, their preparation and use
  • Tropane-derivatives, their preparation and use

Examples

Experimental program
Comparison scheme
Effect test

example 2

[0145] (1R,2S,3S)-2-Carbomethoxy-3-(4-fluorophenyl)tropane and (1R, 2R, 3S)-2-carbomethoxy-3-(4-fluorophenyl)tropane 8

[0146] Grignard reagent was made in a three necked reaction flask equipped with mechanical stirring, an intensive condenser and a pressure equilibrated funnel, using 4bromo-fluorobenzene (27.5 ml, 250 mmol) and magnesium turnings (6.3 g, 260 mmol) in 250 ml absolute diethyl ether. The solution of grignard reagent was cooled to -20.degree. C. and a solution of (-)-anhydroecgonine methyl ester (21.7 g, 120 mmol) in 100 ml absolute diethyl ether was added over 112 hour. The reaction was stirred one hour at -20.degree. C. and the reaction was quenched in one of the following two ways:

[0147] 1) The reaction mixture was stirred into 250 ml crushed ice and the water phase was made acidic by addition of approximately 100 ml 4M hydrochloric acid. The organic phase was discharged and the water phase was washed with 100 ml diethyl ether. The water phase was made basic by additi...

example 3

[0160] (1R, 2R, 3S)-2-Carbomethoxy-3benzyltropane, hydrochloride. 9

[0161] To a solution of (1R, 2S, 3S)-2-carbomethoxy-3-benzyltropane (5.6 g, 20.5 mmol) in absolute methanol (100 ml) was added a solution of sodium methanolate in methanol (2M, 2 ml) and the mixture was refluxed for 16 hours. The reaction mixture was concentrated in vacuo and the residue was dissolved in diethyl ether and was washed with water. The organic phase was dried and concentrated in vacuo. The crude product was purified by column chromatography using a mixture of diethyl ether and pentane (1+1)+1% triethyl amine as eluent yielding (1R, 2R, 3S)-2-carbomethoxy-3-benzyltropane as oil. By dissolution of this product in diethyl ether and subsequent addition of a solution of hydrochloric acid in diethyl ether the title compound precipitated as white crystals, m.p. 188-190.degree. C.

example 4

[0162] 2-Carbomethoxy-3-tropanone. 10

[0163] To a suspension of sodium hydride (3.2 g 80%, 107 mmol, prewashed in cyclohexane) and dimethylcarbonate (9.13 ml, 108 mmol) in absolute cyclohexane heated to reflux temperature, a solution of (+-)-3-tropanone (6.9 g, 50 mmol) in 50 ml absolute cyclohexane was added over 15 minutes. No hydrogen evolution was apparent so 0.2 ml methanol was added. The reaction mixture was stirred over night at reflux temperature and after cooling to ambient temperature 75 ml water was carefully added. To the water phase was added 40 g ammonium chloride and the resulting mixture was extracted 8 times with methylene chloride. The combined methylene chloride organic phases were dried and concentrated in vacuo followed by column chromatography of the crude product using methylene chloride with increasing amounts (up to 10%) of methanol as eluent. The fractions containing the product were concentrated in vacuo and the resulting oil was subjected to Kugelrohr dest...

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Abstract

Compounds of formula (a), (b), (c), or (d), or any mixture thereof, or a pharmaceutically-acceptable salt thereof; wherein R is hydrogen, alkyl, alkenyl, alkynyl, cycloalkyl, cycloalkylalkyl or 2-hydroxyethyl; R3 is -CH2-X-R', wherein X is O, S or NR'', wherein R'' is hydrogen or alkyl and R' is alkyl, alkenyl, alkynyl, cycloalkyl, cycloalkylalkyl, or -CO-alkyl; R4 is phenyl optionally substituted with halogen, CF3, CN, alkoxy, cycloalkoxy, alkyl, cycloalkyl, alkenyl, alkynyl, amino, nitro, heteroaryl, or aryl; 3,4-methylenedioxyphenyl; benzyl optionally substituted with halogen, CF3, CH, alkoxy, cycloalkoxy, alkyl, cycloalkyl, alkenyl, alkynyl, amino, nitro, heteroaryl, or aryl; heteroaryl optionally substituted with halogen, CF3, CN, alkoxy, cycloalkoxy, alkyl, cycloalkyl, alkenyl, alkynyl, amino, nitro, heteroaryl, or aryl; or naphthyl optionally substituted with halogen, CF3, CN, alkoxy, cycloalkoxy, alkyl, cycloalkyl, alkenyl, alkynyl, amino, nitro, heteroaryl, or aryl. The compounds are monoamine neurotransmitter, i.e., dopamine, serotonin, noradrenaline, reuptake inhibitors.

Description

[0001] The present invention relates to novel tropane-derivatives which are valuable monoamine neurotransmitter, i.e dopamine, serotonin and noradrenaline, re-uptake inhibitors and the use of the novel tropane derivatives for the treatment of disorders or diseases responsive to the inhibition of monoamine neurotransmitter re-uptake, such as Parkinson's disease, depression, obsessive compulsive disorders, panic disorders, dementia, memory deficits, attention deficit hyperactivity disorder, obesity, anxiety, eating disorders and drug addiction or misuse, including cocaine abuse.[0002] The brain consists of a plurality of neurons that communicate with each other via chemical messengers. Each neuron generates neurochemicals or neurotransmitters which act at sites being referred to as receptors on the cellular membrane of neurons. One group of neurotransmitters, referred to as the monoamine neurotransmitters, includes serotonin, dopamine and noradrenaline.[0003] Monoamine neurotransmitte...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): A61K31/46A61P25/00A61P25/28C07D451/02
CPCC07D451/00C07D451/02A61P25/00A61P25/16A61P25/24A61P25/28A61P25/30A61P25/36A61P3/04A61K31/46
Inventor SCHEEL-KRUGER, JORGENMOLDT, PETERWATJEN, FRANK
Owner NEUROSEARCH AS
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