This invention relates to compounds of formula I
their use as positive allosteric modulators of mGlu5 receptor activity, pharmaceutical compositions containing the same, and methods of using the same as agents for treatment and/or prevention of neurological and psychiatric disorders associated with glutamate dysfunction such as schizophrenia or cognitive decline such as dementia or cognitive impairment. R
1
, R
2
, R
3
, R
4
, Q have meanings given in the description.
Piperazine derivatives and their use as positive allosteric modulators of mGluR5 receptors
申请人:Heimann Annekatrin
公开号:US08883789B2
公开(公告)日:2014-11-11
This invention relates to compounds of formula I
their use as positive allosteric modulators of mGlu5 receptor activity, pharmaceutical compositions containing the same, and methods of using the same as agents for treatment and/or prevention of neurological and psychiatric disorders associated with glutamate dysfunction such as schizophrenia or cognitive decline such as dementia or cognitive impairment. R1, R2, R3, R4, Q have meanings given in the description.
Regioselective synthesis of carboxylic and fluoromethyl tetrazoles enabled by silver-catalyzed cycloaddition of diazoacetates and aryl diazonium salts
作者:Ming-Yang Xiao、Zhen Chen、Fa-Guang Zhang、Jun-An Ma
DOI:10.1016/j.tet.2020.131063
日期:2020.4
Here we present a dipolar [3 + 2] cycloaddition transformation of diazoacetates with arenediazonium salts under silver catalysis, thus offering a straightforward approach for the regioselective construction of carboxylic tetrazoles. Several merits are accompanied with this reaction including readily available starting reagents, broad coupling scope, high yields, and friendly reaction conditions. The synthetic value is further showcased by one-pot conversion of commercially available primary arylamines to tetrazoles and successful transformations of the cycloadducts into valuable 5-fluoromethyltetrazoles and an analogue of P2X3 receptor antagonist. (C) 2020 Elsevier Ltd. All rights reserved.
Development of a Grignard-Type Reaction for Manufacturing in a Continuous-Flow Reactor
作者:Fabrice G. J. Odille、Anna Stenemyr、Fritiof Pontén
DOI:10.1021/op500290x
日期:2014.11.21
This paper describes the scale-up of a highly exothermic and fast reaction from a microreactor with an internal volume of less than 1 mL to a mesoreactor with an internal volume of 13.5 mL. The development of a continuous process for manufacturing a ketone from an ester using a Grignard reagent is described. The different steps undertaken and the considerations made to be able to operate in continuous mode and achieve a product output of ca. 0.5 kg are presented.