Efficient and Mild Ullmann-Type N-Arylation of Amides, Carbamates, and Azoles in Water
作者:Maud Bollenbach、Pedro G. V. Aquino、João Xavier de Araújo-Júnior、Jean-Jacques Bourguignon、Frédéric Bihel、Christophe Salomé、Patrick Wagner、Martine Schmitt
DOI:10.1002/chem.201700832
日期:2017.10.4
A simple, sustainable, efficient, mild, and low‐cost protocol was developed for d‐glucose‐assisted Cu‐catalyzed Ullmann reactions in water for amides, carbamates, and nitrogen‐containing heterocycles. The reaction was compatible with diverse aryl/heteroaryl iodides, giving highly substituted pyridine, indole, or indazole rings. This method offers an attractive alternative to existing protocols, because
The present invention relates to O-GlcNAc hydrolase (OGA) inhibitors. The invention is also directed to pharmaceutical compositions comprising such compounds, to processes for preparing such compounds and compositions, and to the use of such compounds and compositions for the prevention and treatment of disorders in which inhibition of OGA is beneficial, such as tauopathies, in particular Alzheimer's disease or progressive supranuclear palsy; and neurodegenerative diseases accompanied by a tau pathology, in particular amyotrophic lateral sclerosis or frontotemporal lobe dementia caused by C90RF72 mutations.
[EN] METHOD FOR THE PREPARATION OF FUNCTIONALIZED TRIHALOMETHOXY SUBSTITUTED PYRIDINES<br/>[FR] PROCÉDÉ DE PRÉPARATION DE PYRIDINES SUBSTITUÉES PAR UN RÉSIDU TRIHALOGÉNOMÉTHOXY FONCTIONNALISÉES
申请人:BAYER CROPSCIENCE AG
公开号:WO2010040461A1
公开(公告)日:2010-04-15
The present invention pertains to a process for the preparation of functionalized trihalomethoxypyridines of formula (I) comprising reacting hydroxypyridines with thiophosgene in the presence of a base; reacting the obtained chlorothionoformiates with elemental chlorine and finally converting trichloromethoxy pyridines to trihalomethoxy pyridines using a fluoride source.