Classifications

• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
  • C07C47/00—Compounds having —CHO groups
  • C07C47/52—Compounds having —CHO groups bound to carbon atoms of six—membered aromatic rings
  • C07C47/548—Compounds having —CHO groups bound to carbon atoms of six—membered aromatic rings having unsaturation outside the six-membered aromatic rings
• • 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
  • A61P25/18—Antipsychotics, i.e. neuroleptics; Drugs for mania or schizophrenia
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
  • C07C45/00—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
  • C07C45/56—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds from heterocyclic compounds
  • C07C45/57—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds from heterocyclic compounds with oxygen as the only heteroatom
  • C07C45/59—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds from heterocyclic compounds with oxygen as the only heteroatom in five-membered rings
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D307/00—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom
  • C07D307/77—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom ortho- or peri-condensed with carbocyclic rings or ring systems
  • C07D307/78—Benzo [b] furans; Hydrogenated benzo [b] furans
  • C07D307/86—Benzo [b] furans; Hydrogenated benzo [b] furans with an oxygen atom directly attached in position 7
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D307/00—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom
  • C07D307/94—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom spiro-condensed with carbocyclic rings or ring systems, e.g. griseofulvins
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D317/00—Heterocyclic compounds containing five-membered rings having two oxygen atoms as the only ring hetero atoms
  • C07D317/08—Heterocyclic compounds containing five-membered rings having two oxygen atoms as the only ring hetero atoms having the hetero atoms in positions 1 and 3
  • C07D317/10—Heterocyclic compounds containing five-membered rings having two oxygen atoms as the only ring hetero atoms having the hetero atoms in positions 1 and 3 not condensed with other rings
  • C07D317/14—Heterocyclic compounds containing five-membered rings having two oxygen atoms as the only ring hetero atoms having the hetero atoms in positions 1 and 3 not condensed with other rings with substituted hydrocarbon radicals attached to ring carbon atoms
  • C07D317/18—Radicals substituted by singly bound oxygen or sulfur atoms
  • C07D317/20—Free hydroxyl or mercaptan

Definitions

• the present invention relates to a new process for the preparation of [2- (2,3-dihydro-benzofuran or benzofuran-7-yloxy) -ethyl] - (3-cyclopenten-1-yl-benzyl) -amino derivatives of formula (3)
• (a) represents a single or double bond
• W represents a group CH, CH 2 , CHCH 3 , CCH 3 , C (CH 3 ) 2 , a group C (CH 2 ) 2 (ie, a carbon atom carrying two methylene groups linked together so as to form a unit spiro-cyclopropane) with the proviso, however, that when (a) is a double bond then W is exclusively CH or CCH 3 and when (a) is a single bond, then W is exclusively CH 2 , CHCH 3 , C (CH 3 ) 2 or C (CH 2) 2
• the compounds of formula (3) are D 2 dopaminergic receptor antagonists and receptor agonists.
• formula (3) has a low propensity to cause extra-pyramidal disorders.
• the compounds of formula (3) are potentially useful in the treatment of acute and chronic psychotic states in humans. Because of their important therapeutic potential and considerable therapeutic need in this field, a method of synthesis of compounds (3), applicable industrially, is highly desirable.
• the first step involves a coupling reaction, of Heck type, catalyzed by a palladium complex.
• the use of transition metals poses both the problem of their elimination and the measurement of the residual metal contents, both at the level of the active principle (3) and the effluents.
• the coupling is not completely regioselective and a mixture of isomeric cyclopentenic derivatives is obtained.
• the purification of the compound (4) is then carried out by chromatography on silica gel. This purification step becomes difficult to practice when the amounts of product to be purified increase.
• the separation of the cyclopentenic isomers at a later stage for example at the level of the compounds (5), (1) or (3); nor is it easily achievable.
• the controlled oxidation reaction of the alcohol (5) to the aldehyde (1) requires an excess of the oxidizing agent (MnO 2 ) to obtain an acceptable conversion rate.
• the aldehyde (1) formed is strongly adsorbed on the surface of the precipitate, which must be very carefully extracted, preferably under heat, in order to recover (1) with an acceptable yield.
• the present invention relates to a novel process for synthesizing compounds (3).
• the [2- (2,3-dihydro-benzofuran or benzofuran-7-yloxy) -ethyl] - (3-cyclopenten-1-yl-benzyl) -amino derivatives of formula ( 3) are obtained by means of a reductive amination reaction as described in scheme A from intermediates (2) and (1), the aldehyde (1) used being obtained from the intermediate (6). ).
• intermediate 6 is obtained by condensation of an organolithium derived from 2- (3-bromophenyl) -1,3-dioxolane on cyclopentanone.
• the present invention also relates to a novel process for the synthesis of aldehyde (1).
• the novel process for the synthesis of aldehyde (1) uses as sole intermediate the tertiary alcohol of formula (6).
• the aldehyde of formula (1) is prepared in only two steps according to scheme C with an overall yield much higher than that obtained using the initial sequence (see Scheme B).
• An essential aspect of the invention arises from the fact that the new process for the preparation of aldehyde (1) no longer involves the oxidation step, which is recalled as the treatment was particularly problematic.
• a further advantage of the invention is that the synthesis of the compound (1), and thus ultimately the active ingredient (3), is carried out without the intervention of transition metal catalyst.
• the first step consists in condensing the aryllithium intermediate derived from 2- (3-bromophenyl) -1,3-dioxolane [17789-14-9] on cyclopentanone [120-92-3], commercially available.
• the preparation of said aryllithium utilizes a conventional bromine / lithium exchange reaction in organic chemistry (e.g., J. Med Chem 1998, 41, 358).
• a Lewis acid minimizes the formation of the reduction product (7) resulting from the protonation of aryllithium by cyclopentanone.
• Lithium chloride has been found particularly suitable for promoting the desired condensation reaction at the expense of reduction (see Scheme D).
• the proportion of the product (7) is very low ( ⁇ 2%) which makes it possible to avoid the separation of the expected compound (6) from the by-product (7) by chromatography. It is of course advantageous to avoid chromatographic separation, especially on a large scale.
• the second step combines two reactions: deprotection of the aldehyde function and dehydration of the tertiary alcohol. Separately, each of these reactions is well known to those skilled in the art. There are also precedents, on substrates other than (6), in which these reactions occur concomitantly (eg, J. Org Chem 1997, 62, 4183 and Org Lett 2000, 2, 1791). In the case of intermediate (6), the experimental conditions were chosen to perform the double "one-pot" transformation.
• the method for synthesizing compounds of formula (3) thanks to the new method for obtaining aldehyde (1), is more advantageous both economically and environmentally, so more conducive to industrial exploitation.
• Another aspect of the invention relates to the intermediate of formula (6) ie, 2- [3- (1-cyclopentane-1-hydroxy) phenyl] -1,3-dioxolane, - new compound highlighted, synthesized and used as an intermediate in the synthesis of aldehyde (1) and ultimately in the synthesis of active compounds of formula (3).
• the present invention also relates to a process for the synthesis of the intermediate of formula (6) ie, 2- [3- (1-cyclopentane-1-hydroxy) phenyl] -1,3-dioxolane by condensation of a derived aryllithium intermediate 2- (3-bromophenyl) -1,3-dioxolane on cyclopentanone, preferably in the presence of a Lewis acid such as, for example, lithium chloride.
• a Lewis acid such as, for example, lithium chloride.
• N-Butyl lithium (2.5 M in THF, 9.6 mL, 0.024 mol) is slowly added at -78 ° C. to a solution of 2- (3-bromophenyl) -1,3-dioxolane (5 g). 0.022 mol) in dry THF (50 mL) and containing lithium chloride (1.85 gr, 0.043 mol).
• the reaction mixture is stirred for 1 hour 30 minutes at -78 ° C. and then the cyclopentanone (2.9 mL, 0.033 mol) is added dropwise. The temperature is allowed to rise to room temperature for two hours.
• WO 2004/035561 (0.68 g, 3.26 mmol) in 15 ml of 1,2-dichloroethane and the mixture is heated at 60 ° C. for 17 hours. The mixture is cooled to room temperature, the solid is filtered and the solvent is evaporated under reduced pressure. The residue was diluted with 15 'ml of methanol and then cooled to 0 ° C. then introduced 0.35 g of potassium borohydride (6.52 mmol) and the reaction mixture is stirred for three hours at 0 0 C. The mixture was then poured in ice water, extracted with ethyl acetate and washed with saturated aqueous sodium chloride solution.

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• Chemical & Material Sciences (AREA)
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• Health & Medical Sciences (AREA)
• Engineering & Computer Science (AREA)
• Bioinformatics & Cheminformatics (AREA)
• Psychiatry (AREA)
• Biomedical Technology (AREA)
• Neurology (AREA)
• Neurosurgery (AREA)
• Chemical Kinetics & Catalysis (AREA)
• General Chemical & Material Sciences (AREA)
• Medicinal Chemistry (AREA)
• Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
• Pharmacology & Pharmacy (AREA)
• Life Sciences & Earth Sciences (AREA)
• Animal Behavior & Ethology (AREA)
• General Health & Medical Sciences (AREA)
• Public Health (AREA)
• Veterinary Medicine (AREA)
• Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
• Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
• Furan Compounds (AREA)

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• 2006
  • 2006-03-14 FR FR0602194A patent/FR2898601A1/fr not_active Withdrawn
• 2007
  • 2007-03-08 CN CNA2007800075294A patent/CN101395146A/zh active Pending
  • 2007-03-08 JP JP2008558854A patent/JP2009530253A/ja active Pending
  • 2007-03-08 US US12/225,048 patent/US20090082582A1/en not_active Abandoned
  • 2007-03-08 WO PCT/FR2007/000479 patent/WO2007104872A1/fr active Application Filing
  • 2007-03-08 AU AU2007226462A patent/AU2007226462A1/en not_active Abandoned
  • 2007-03-08 BR BRPI0708984-8A patent/BRPI0708984A2/pt not_active Application Discontinuation
  • 2007-03-08 CA CA002646346A patent/CA2646346A1/fr not_active Abandoned
  • 2007-03-08 EP EP07731168A patent/EP1996570A1/de not_active Withdrawn
• 2008
  • 2008-07-22 ZA ZA200806371A patent/ZA200806371B/xx unknown

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