[EN] NOVEL PYRAZINE DERIVATIVES<br/>[FR] NOUVEAUX DÉRIVÉS DE PYRAZINE
申请人:HOFFMANN LA ROCHE
公开号:WO2013060751A1
公开(公告)日:2013-05-02
The invention relates to a compound of formula (I), wherein R1 to R4 are defined as in the description and in the claims. The compound of formula (I) can be used as a medicament.
The invention relates to a compound of formula (I)
wherein R
1
to R
4
are defined as in the description and in the claims. The compound of formula (I) can be used as a medicament. In particular, the compound may be used as a preferential agonist of Cannabinoid Receptor 2.
Selectfluor-promoted regioselective chlorination/bromination of 2-aminopyridines and 2-aminodiazines using LiCl/LiBr
作者:Jiao Hu、Gang Zhou、Yawei Tian、Xiaoming Zhao
DOI:10.1039/c9ob00972h
日期:——
source, the chlorination of 2-aminopyridines or 2-aminodiazines in the presence of Selectfluor and DMF is established under mild conditions. This method gives chlorinated pyridines or diazines in good to high yields with high regioselectivities. Also, this method is extended to the bromination of 2-aminopyridines or 2-aminodiazines by using LiBr. The regioselectivity of the chlorination reaction is