[3+1+1] type cyclization of ClCF<sub>2</sub>COONa for the assembly of imidazoles and tetrazoles <i>via in situ</i> generated isocyanides
作者:Ya Wang、Yao Zhou、Qiuling Song
DOI:10.1039/d0cc01919d
日期:——
A facile synthesis of imidazoles and tetrazoles via [3+1+1] type cyclization of ClCF2COONa is developed. A diverse array of imidazoles and tetrazoles were obtained in decent yields via isocyanide intermediates. Notably, this is the first example of the cycloaddition of in situ generated isocyanides.
[EN] IMIDAZOL-4-YL-ETHYNYL-PYRIDINE DERIVATIVES<br/>[FR] DERIVES DE L'IMIDAZOL-4-YL-ETHYNYL-PYRIDINE
申请人:HOFFMANN LA ROCHE
公开号:WO2004080998A1
公开(公告)日:2004-09-23
4-[1-Aryl-imidazol-4-ylethynyl]-2-alkyl-pyridine and 1-heteroaryl-imidazol-4-ylethynyl]-2-alkyl-pyridine derivatives and pharmaceutically acceptable salts thereof for the treatment or prevention of disorders mediated full or in part by metabotropic glutamate receptor 5, e.g. acute, traumatic and chronic degenerative processes of the nervous system, such as Alzheimer's disease, senile dementia, Parkinson's disease, Huntington's chorea, amyotrophic lateral sclerosis and multiple sclerosis, psychiatric diseases such as schizophrenia and anxiety, depression, pain and drug dependency.
Novel synthesis of 1-substituted-4-imidazolecarboxylates via solvent-free cycloaddition reaction between formamidines and isocyanides
作者:Han Cao、Fu-sheng Bie、Xue-jing Liu、Ying Han、Jie Ma、Yi-jun Shi、Peng Yan、Chao-yue Sun、Hai-meng Wang
DOI:10.1016/j.tet.2020.131205
日期:2020.5
A simple and efficient protocol for cyclization between formamidines and ethyl isocyanoacetate has been described in the absence of metal catalyst and solvent. A series of 1-substituted-4-imidazolecarboxylates were synthesized in moderate to good yields with DABCO as base additive.
The present invention relates to imidazole derivatives of formula I
1
wherein R
1
, R
2
, R
3
and R
4
are described hereinbelow. These compounds can be used in the treatment or prevention of mGluR5 receptor mediated disorders. These compounds are useful, inter alia, in the treatment or prevention of acute and/or chronic neurological disorders such as psychosis, epilepsy, schizophrenia, Alzheimer' disease, cognititve disorders and memory deficits, as well as chronic and acute pain.
The present invention provides compounds of formula (I), Formula (I) wherein R1, R2 or R3 are as described herein, as well as pharmaceutically acceptable salts thereof. Further the present invention is concerned with the manufacture of the compounds of formula (I), pharmaceutical compositions comprising them and their use as medicaments.