converted to 6-[1-(arylamino)ethyl]pteridine derivatives 8 and 7, respectively, in good to moderate yields by stepwise reactions with p-substituted anilines via imine intermediates using a Lewis acid catalyst followed by treatment with sodium tetrahydroborate. The one-step reductive amination of the starting acetylpteridine also proceeded in the presence of 2-picoline-borane complex in satisfactory yield
New 7,8-dihydro-1,6-naphthyridin-5(6h)-one-derivatives as PDE4 inhibitors
申请人:Almirall, S.A.
公开号:EP2380890A1
公开(公告)日:2011-10-26
New 7,8-dihydro-1,6-naphthyridin-5(6H)-one derivatives derivatives having the chemical structure of formula (I) are disclosed; as well as process for their preparation, pharmaceutical compositions comprising them and their use in therapy as inhibitors of the phosphodiesterase IV (PDE4).