The object of the present invention is to provide 1-(1-tert-butoxycarbonyl-4-piperidylacetyl)-4-mesyloxypiperidine having a low content of impurities The object can be solved by a method for preparing 1-(1-benzyl-4-piperidylacetyl)-4-hydroxypiperidine, comprising the steps of: (1) reductively reacting 1-benzyl-4-piperidylidene acetic acid ethyl ester represented by the formula [1]: ##STR00001##
to obtain 1-benzyl-4-piperidyl acetic acid ethyl ester represented by the formula [2]: ##STR00002## (2) adding an ammonium chloride aqueous solution and an organic solvent to the liquid containing 1-benzyl-4-piperidyl acetic acid ethyl ester, mixing the whole, and separating into an organic layer and an aqueous layer, (3) collecting 1-benzyl-4-piperidyl acetic acid ethyl ester from the organic layer, and (4) reacting the obtained 1-benzyl-4-piperidyl acetic acid ethyl ester with 4-hydroxypiperidine represented by the formula [3]: ##STR00003##
in the presence of base, to obtain 1-(1-benzyl-4-piperidylacetyl)-4-hydroxypiperidine represented by the formula [4]: ##STR00004##

The object of the present invention is to provide 1-(1-tert-butoxycarbonyl-4-piperidylacetyl)-4-mesyloxypiperidine having a low content of impurities The object can be solved by a method for preparing 1-(1-benzyl-4-piperidylacetyl)-4-hydroxypiperidine, comprising the steps of: (1) reductively reacting 1-benzyl-4-piperidylidene acetic acid ethyl ester represented by the formula [1]: ##STR00001##
to obtain 1-benzyl-4-piperidyl acetic acid ethyl ester represented by the formula [2]: ##STR00002## (2) adding an ammonium chloride aqueous solution and an organic solvent to the liquid containing 1-benzyl-4-piperidyl acetic acid ethyl ester, mixing the whole, and separating into an organic layer and an aqueous layer, (3) collecting 1-benzyl-4-piperidyl acetic acid ethyl ester from the organic layer, and (4) reacting the obtained 1-benzyl-4-piperidyl acetic acid ethyl ester with 4-hydroxypiperidine represented by the formula [3]: ##STR00003##
in the presence of base, to obtain 1-(1-benzyl-4-piperidylacetyl)-4-hydroxypiperidine represented by the formula [4]: ##STR00004##

This invention relates to compounds of formula (I) and their use as allosteric modulators of mGluR5 receptor activity, pharmaceutical compositions containing the same, and methods of using the same as agents for the treatment and/or prevention of neurological and psychiatric disorders associated with glutamate dysfunction, such as schizophrenia or cognitive decline, dementia or cognitive impairment, or other pathologies that can be related directly or indirectly to glutamate dysfunction. ##STR00001##

This invention relates to compounds of formula (I) and their use as allosteric modulators of mGluR5 receptor activity, pharmaceutical compositions containing the same, and methods of using the same as agents for the treatment and/or prevention of neurological and psychiatric disorders associated with glutamate dysfunction, such as schizophrenia or cognitive decline, dementia or cognitive impairment, or other pathologies that can be related directly or indirectly to glutamate dysfunction. ##STR00001##

Derivatives of N,N-diethyl-N′-phenyl-piperazine, a silent agonist of the mammalian α7 nicotinic acetylcholine receptor, are provided. These silent agonists control the desensitization state of the receptor. Further provided are pharmaceutical compositions that allow the administration of the silent agonists of the disclosure to a subject animal or human in need of treatment for a pathological condition arising from such as inflammation. The novel silent agonists also may be co-administered to a patient simultaneously or consecutively with a type II positive allosteric modulator to modulate the activity of the receptor.

Derivatives of N,N-diethyl-N′-phenyl-piperazine, a silent agonist of the mammalian α7 nicotinic acetylcholine receptor, are provided. These silent agonists control the desensitization state of the receptor. Further provided are pharmaceutical compositions that allow the administration of the silent agonists of the disclosure to a subject animal or human in need of treatment for a pathological condition arising from such as inflammation. The novel silent agonists also may be co-administered to a patient simultaneously or consecutively with a type II positive allosteric modulator to modulate the activity of the receptor.

Derivatives of N,N-diethyl-N′-phenyl-piperazine, a silent agonist of the mammalian α7 nicotinic acetylcholine receptor, are provided. These silent agonists control the desensitization state of the receptor. Further provided are pharmaceutical compositions that allow the administration of the silent agonists of the disclosure to a subject animal or human in need of treatment for a pathological condition arising from such as inflammation. The novel silent agonists also may be co-administered to a patient simultaneously or consecutively with a type II positive allosteric modulator to modulate the activity of the receptor.

Derivatives of N,N-diethyl-N′-phenyl-piperazine, a silent agonist of the mammalian α7 nicotinic acetylcholine receptor, are provided. These silent agonists control the desensitization state of the receptor. Further provided are pharmaceutical compositions that allow the administration of the silent agonists of the disclosure to a subject animal or human in need of treatment for a pathological condition arising from such as inflammation. The novel silent agonists also may be co-administered to a patient simultaneously or consecutively with a type II positive allosteric modulator to modulate the activity of the receptor.

Aniline compounds are provided which bind to CCR(4) and are useful for the treatment of diseases such as allergic diseases, autoimmune diseases, graft rejection and cancer.

Aniline compounds are provided which bind to CCR(4) and are useful for the treatment of diseases such as allergic diseases, autoimmune diseases, graft rejection and cancer.