title: 1H and 13C NMR spectral assignments of novel chromenylchalcones.
abstract: Several types of chalcones containing 2H-chromen group were synthesized. Claisen-Schmidt condensation of 2H-chromen-3-carbaldehydes (I) with methoxy substituted acetophenones afforded (E)-3-(2H-chromen-3-yl)-1-(methoxyphenyl)prop-2-en-1-ones (chromenylchalcones, 1-7). Other types of chromenylchalcone, (E)-1-(6-methoxy-2H-chromen-3-yl)-3-(methoxyphenyl)prop-2-en-1-ones (8-13) were also obtained between reaction of methoxy substituted benzaldehydes and 1-(6-methoxy-2H-chromen-3-yl)ethanone (II). Dichromenylchalcones (14-16) were also synthesized through the same reaction between aldehydes (I) and ketone (II). Their complete (1)H-NMR and (13)C-NMR assignments are reported here and more polysubstituted chromenylchalcones synthesized or isolated from the natural sources in the future can be identified on the basis of the NMR data reported here.
authors.affiliation: Division of Bioscience and Biotechnology, BMIC, Konkuk University, Seoul 143-701, South Korea.
authors.forename: Hyuk
authors.initials: H
authors.lastname: Yoon
authors.forename: Seunghyun
authors.initials: S
authors.lastname: Ahn
authors.forename: Doseok
authors.initials: D
authors.lastname: Hwang
authors.forename: Geunhyeong
authors.initials: G
authors.lastname: Jo
authors.forename: Dong Woon
authors.initials: DW
authors.lastname: Kim
authors.forename: Sang Ho
authors.initials: SH
authors.lastname: Kim
authors.forename: Dongsoo
authors.initials: D
authors.lastname: Koh
authors.forename: Yoongho
authors.initials: Y
authors.lastname: Lim
mesh_terms: D002247:Carbon Isotopes; D047188:Chalcones / Q000138:chemical synthesis / Q000737:chemistry* / Q000302:isolation & purification; D009682:Magnetic Resonance Spectroscopy / Q000592:standards; D015394:Molecular Structure; D011522:Protons; D012015:Reference Standards
chemical_list: D002247:Carbon Isotopes; D047188:Chalcones; D011522:Protons