Open AccessNovel Photosynthesis of 5,8a-dichloro-2-(4- Methoxyphenyl)-8ah-chromene from Its Chalcone Isomer And Ft-ir, 1 H And 13 C Nmr Spectroscopic Investigation
Author(s) -
Abdullah A. Yousif,
Ghazwan F. Fadhil
Publication year - 2020
Publication title -
maǧallaẗ ǧāmi'aẗ duhūk
Language(s) - English
Resource type - Journals
eISSN - 2521-4861
pISSN - 1812-7568
DOI - 10.26682/sjuod.2020.23.2.14
Subject(s) - chalcone , chemistry , aldol condensation , condensation , mass spectrometry , elemental analysis , base (topology) , carbon 13 nmr , proton nmr , claisen rearrangement , organic chemistry , medicinal chemistry , catalysis , chromatography , mathematical analysis , physics , mathematics , thermodynamics
In the presence of alcoholic alkali, the base-catalyzed aldol condensation of equimolar quantities of substituted acetophenones and aldehydes to give good yields of condensation product. This reaction is known as the Claisen-Schmidt condensation. The Trans-3-(2,6-dichlorophenyl)-1-(4-methoxyphenyl)prop- 2-en-1-one (trans 2,6-methoxy chalcone) was synthesised by Clasien Schmidt reaction, then it exposed to the Xenon lamp to prepare the 5,8a-dichloro-2-(4-methoxyphenyl)-8aH-chromene (2,6-methoxy chromene). A number of techniques were used to characterise the mentioned two products such as, thin layer chromatography, FT-IR, 1H and 13C nuclear magnetic resonance, liquid chromatography/quadrupole time-of-flight mass spectrometry and elemental analysis (CHNO).