To develop a highly safe measure to treat Alzheimer's disease using a secretase-inhibiting substance, there is provided a compound represented by the following general formula (I) or a salt thereof:
wherein A represents a phenyl group or the like, R1 represents a chlorine atom, a bromine atom, or a nitro group or the like, R2, R3, R4, and R5 each represent a hydrogen atom or the like, and L represents CH2—CH2 or CH═CH.
The present invention provides a novel compound that is structurally similar to curcumin and has a suppressive effect on Aβ aggregation, a degradative effect on Aβ aggregates, an inhibitory effect on β-secretase, and a protective effect on neurons. The novel compound is a compound represented by the following general formula (Ia) or a salt thereof:
wherein R1 represents a 4-hydroxy-3-methoxyphenyl group or the like, and R2 represents a 1H-indol-6-yl group or the like.
To develop a highly safe measure to treat Alzheimer's disease using a secretase-inhibiting substance, there is provided a compound represented by the following general formula (I) or a salt thereof:
wherein A represents a phenyl group or the like, R1 represents a chlorine atom, a bromine atom, or a nitro group or the like, R2, R3, R4, and R5 each represent a hydrogen atom or the like, and L represents CH2-CH2 or CH=CH.