Accumulation of intracellular sorbitol, the reduced product of glucose, catalyzed by aldose reductase (AR) (EC 1.1.1.21), is thought to be the cause of the development of diabetic complications. Our attention is focused on finding compounds which inhibit AR without significantly inhibiting aldehyde reductase (ALR) (EC 1.1.1.2). The uracil or 2,4-dioxoimidazolidine skeleton having the benzothiazolyl or 4-chloro-3-nitrophenyl group as an aryl part indicated not only extremely high AR inhibitory activity but also AR selectivity. The ratio of IC50(ALR)/IC50(AR) of 3-[(5-chlorobenzothiazol-2-yl)methyl]-1,2,3,4-tetrahydro-2,4-dioxopyrim-idine-1-acetic acid (47d) was more than 17 500. The uracil skeleton with the benzothiazolyl moiety seemed to be the best combination for selective AR inhibition.
Herein, we report the first synthesis of two recently discovered, prenylated 2-thiouridine derivatives, 5-methylaminomethyl-S-geranyl-2-thiouridine (mnm5geS2U) and 5-carboxymethylaminomethyl-S-geranyl-2-thiouridine (cmnm5geS2U). S-Geranylated 2-thiouridines were obtained by S-alkylation of the parent (c)mnm5S2U nucleosides suitably protected at their C5-alkylamino function. Comparative physicochemical
There are provided compounds having a superior PHD2 inhibitory effect that are represented by general formula (I′):
(in the above-mentioned general formula (I′),
W, Y, R2, R3, R4, and Y4 are as described hereinabove), or pharmaceutically acceptable salts thereof.