136117-71-0Relevant articles and documents
BICYCLIC PYRIDINE, PYRAZINE, AND PYRIMIDINE DERIVATIVES AS PI3K BETA INHIBITORS
-
Page/Page column 111; 115, (2018/01/19)
The present invention relates to bicyclic pyridine, pyrazine, and pyrimidine derivatives of Formula (I) wherein the variables have the meaning defined in the claims. The compounds according to the present invention are useful as pI3Kβ inhibitors. The invention further relates to pharmaceutical compositions comprising said compounds as an active ingredient as well as the use of said compounds as a medicament.
Imidazo[1,2-a]pyridines. Synthesis and inotropic activity of new 5-imidazo[1,2-a]pyridinyl-2(1H)-pyridinone derivatives
Yamanaka,Miyake,Suda,Ohhara,Ogawa
, p. 1556 - 1567 (2007/10/02)
A series of 1,2-dihydro-5-imidazo[1,2-a]pyridinyl-2(1H)-pyridinones was synthesized and evaluated for positive inotropic activity. 1,2-Dihydro-5-imidazo[1,2-a]pyridin-6-yl-6-methyl-2-oxo-3- pyridinecarbonitrile (11a) hydrochloride monohydrate (E-1020) was found to be a potent and selective inhibitor of phosphodiesterase III and a long-acting, potent, orally active positive inotropic agent. Additional imidazo[1,2-a]pyridin-2-yl (3a), -3-yl (16), -7-yl (20) and -8-yl (24a) compounds were also prepared. Altering the pyridine substitution from the 2-position to the 6-position produced a 2-fold increase in the i.v. cardiotonic potency (ED50) from 52 to 23 μg/kg, while substitution at the 3-, 7- or 8-position reduced potency. In the 2-positional isomers, introduction of halogen groups enhanced the activity and 3-chloro-1,2-dihydro-5-(6-fluoroimidazo[1,2-a]pyridin-2-yl)-6-methyl-2(1H)- pyridinone (3a) was the most potent (i.v. ED50 11 μg/kg) in this seris. E-1020 is presently under development for the treatment of congestive heart failure.