%0 Journal Article %T New Convenient Synthesis of 8-C-Methylated Homoisoflavones and Analysis of Their Structure by NMR and Tandem Mass Spectrometry %A Santosh Kumar Yadav %J International Journal of Organic Chemistry %P 46-54 %@ 2161-4695 %D 2021 %I Scientific Research Publishing %R 10.4236/ijoc.2021.111005 %X Homoisoflavonoids are in the subclass of the larger family of flavonoids having one more alkyl carbon than flavonoids. Among them, 8-C-Methylated homoisoflavones have not been extensively studied for synthesis and biological evaluation. AuthorĄ¯s current objective is to synthesize 8-C-Methylated homoisoflavones by the reaction of 3-C-methylated dihydrochalcones with N,NĄ¯-dimethyl (chloromethylene) ammonium chloride generated in situ from DMF and PCl5 for one carbon extension at about room temperature. The 3-C-methylated dihydrochalcones were synthesized by the reduction of 3-C-methylated chalcones, which were prepared from 3-C-methylated acetophenones and aromatic aldehydes in the presence of base. All the synthesized novel homoisoflavonesĄ¯s structures were characterized by NMR and Tandem Mass Spectrometry. %K 8-C-Methylated Homoisoflavones %K 3-C-Methylated Dihydrochalcones %K 3-C-Methylated Chalcones %K 3-C-Methylated Acetophenones %K Dimethylformamide %K BF< %K sub> %K 3< %K /sub> %K & %K middot %K Et< %K sub> %K 2< %K /sub> %K O %K PCl< %K sub> %K 5< %K /sub> %U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=108051