title: Synthesis and biological evaluation of 9Z-retinoic acid analogs having 2-substituted benzo[b]furan.
abstract: Palladium-catalyzed cross-coupling reactions of a 2-substituted 3-iodobenzo[b]furans and stannanyl ester afforded the stereoselective production of 9Z-retinoic acid ester analogs in good yields. These esters were then converted to the corresponding acids via basic hydrolysis in excellent yields, and their biological activities were evaluated. The analog changed the connected position of polyene side chain from 2-position to 3-position of benzo[b]furan decreased the biological activities dramatically, and the introduction of various substituents at 2-position afforded almost no effect on the activities.
authors.affiliation: Department of Organic Chemistry for Life Science, Kobe Pharmaceutical University, Kobe 658-8558, Japan.
authors.forename: Takashi
authors.initials: T
authors.lastname: Okitsu
authors.forename: Daisuke
authors.initials: D
authors.lastname: Nakazawa
authors.forename: Kimie
authors.initials: K
authors.lastname: Nakagawa
authors.forename: Toshio
authors.initials: T
authors.lastname: Okano
authors.forename: Akimori
authors.initials: A
authors.lastname: Wada
mesh_terms: D000077556:Alitretinoin; D000818:Animals; D001572:Benzofurans / Q000737:chemistry*; D045744:Cell Line, Tumor; D006801:Humans; D008024:Ligands; D015394:Molecular Structure; D051381:Rats; D018168:Receptors, Retinoic Acid / Q000737:chemistry* / Q000235:genetics; D047488:Retinoid X Receptors / Q000737:chemistry* / Q000235:genetics; D013237:Stereoisomerism; D013329:Structure-Activity Relationship; D014158:Transcription, Genetic / Q000187:drug effects / Q000235:genetics; D015533:Transcriptional Activation / Q000187:drug effects; D014212:Tretinoin / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology*
chemical_list: D001572:Benzofurans; D008024:Ligands; D018168:Receptors, Retinoic Acid; D047488:Retinoid X Receptors; D000077556:Alitretinoin; D014212:Tretinoin