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Asano, T., Murayama, T., Hirai, Y. and Shoji, J. (1993) Comparative Studies on the Constituents of Ophiopogonis Tuber and Its Congeners. VII. Studies on the Homoisoflavonoids of the Subterranean Part of Ophiopogon Japonicas Ker-Gawler cv. Nanus. Chemical and Pharmaceutical Bulletin, 41, 566-570.
https://doi.org/10.1248/cpb.41.391

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.