Patent number: 8956589
Abstract: Disclosed are a curcumin derivative or a salt thereof, which contains a fluorine atom, represented by formula (I): (wherein R1a and R1b are each independently a hydrogen atom, alkyl, acetyl, or methoxycarbonyl; R2s are each independently a fluorine atom, CHF2—, CF3—, CHF2O—, or CF3O—; R3s are each independently a hydrogen atom or a fluorine atom; A is alkyl, cyano, carboxyl, alkoxycarbonyl, or R4—(CH2)m—; R4 is hydroxy, carboxy, cyano, acetyloxy, alkoxycarbonyl, alkoxyalkoxy, hydroxyalkoxy, or CONR5R6; R5 and R6 are each independently a hydrogen atom or alkyl; and m is an integer from 1 to 5), and a diagnostic imaging agent for diagnosing a disease in which an amyloid ? peptide aggregate accumulates, the diagnostic imaging agent containing a compound having a 1,3-dicarbonyl structure, wherein the compound exists in a keto form and an enol form, and the keto form and the enol form have different affinities, respectively, to the amyloid ? peptide aggregate.
Type:
Grant
Filed:
February 26, 2010
Date of Patent:
February 17, 2015
Assignee:
Shiga University of Medical Science
Inventors:
Ikuo Tooyama, Hiroyasu Taguchi, Shigehiro Morikawa, Makoto Urushitani, Daijiro Yanagisawa, Tomone Nagae, Nobuaki Shirai, Koichi Hirao, Masanari Kato, Hirohiko Kimura, Takashi Okada