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Watanabe, Y., Sanada, S., Ida, Y. and Shoji, J. (1985) Comparative Studies on the Constituents of Ophiopogonis Tuber and Its Congeners. IV. Studies on the Homoisoflavonoids of the Subterranean Part of Ophiopogon Ohwii Okuyama and Ophiopogon Jaburan (Kunth) Lodd. Chemical and Pharmaceutical Bulletin, 33, 5358-5363.
https://doi.org/10.1248/cpb.33.5358

has been cited by the following article:

• TITLE: New Convenient Synthesis of 8-C-Methylated Homoisoflavones and Analysis of Their Structure by NMR and Tandem Mass Spectrometry

  AUTHORS: Santosh Kumar Yadav

  KEYWORDS: 8-C-Methylated Homoisoflavones, 3-C-Methylated Dihydrochalcones, 3-C-Methylated Chalcones, 3-C-Methylated Acetophenones, Dimethylformamide, BF3·Et2O, PCl5

  JOURNAL NAME: International Journal of Organic Chemistry, Vol.11 No.1, March 26, 2021

  ABSTRACT: 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. Author’s current objective is to synthesize 8-C-Methylated homoisoflavones by the reaction of 3-C-methylated dihydrochalcones with N,N’-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 homoisoflavones’s structures were characterized by NMR and Tandem Mass Spectrometry.